WDM components, manufacturing methods, and communication devices

Abstract

The present application provides a wavelength division multiplexing WDM component. The WDM component includes multiple bandpass filters or multiple bandstop filters. The WDM component may further include a total reflection structure or a low-pass / high-pass filter. By using the WDM component, multiple channels of single-fiber multi-wavelength signals can be combined into one channel of single-fiber multi-wavelength signals. In this way, the optical signal processing cost is reduced.

Description

[Technical field]

[0001] The present application relates to the field of communications, and more particularly to wavelength division multiplexing (WDM) components, manufacturing methods, and communications devices. [Background technology]

[0002] Optical fiber communication is a common communication technology. For example, in wireless communication systems, optical fiber communication is widely applied between base stations, between core networks and base stations, between core network devices, and between baseband units and radio units of base stations.

[0003] Wavelength division multiplexing (WDM) is a technology used to combine multiple optical signals of different wavelengths through a multiplexer and then couple the signals into the same optical fiber for data transmission.

[0004] A small form-factor pluggable (SFP) is an optical module that can implement optical-electrical conversion, i.e., modulate an electrical signal into a light wave to obtain an optical signal, and / or demodulate an optical signal to obtain an electrical signal. A single-channel single-wavelength optical signal output by the SFP or input into the SFP is carried on an optical fiber for transmission. To improve the transmission efficiency, through WDM, the single-fiber single-wavelength signal output by the SFP and the single-fiber single-wavelength signal input into the SFP can be combined into a single-fiber multi-wavelength signal for transmission.

[0005] Currently, industrial applications of dual small form-factor pluggable (DSFP) are being implemented due to the advantages of dual channel interface and the same encapsulation style as small form-factor pluggable SFP. Although limited by the optical fiber density that can be supported by the SFP encapsulation style, DSFP can currently support dual channel single fiber bidirectional optical signaling, i.e. BiDi (bidirectional) optical signaling.

[0006] However, in current WDM components, a single WDM component does not support multiplexing of multiple channel single-fiber multi-wavelength optical signals (also called multiple-path single-fiber multi-wavelength optical signals or multiple single-fiber multi-wavelength optical signals), for example, multiplexing of dual channel (also called dual channel) single-fiber multi-directional optical signals of DSFP. How to enable a single WDM component to support multiple channel single-fiber multi-wavelength optical signals is an urgent problem to be solved. Summary of the Invention

[0007] The present application provides a WDM component, a WDM component manufacturing method, and a communications device, in which a single WDM component can support multiplexing of multiple channel single-fiber, multi-wavelength optical signals, and correspondingly can also support demultiplexing to split a one channel single-fiber, multi-wavelength optical signal into multiple channel single-fiber, multi-wavelength optical signals.

[0008] According to a first aspect, the present application further provides a wavelength division multiplexing WDM component, the WDM component comprising: It includes at least two first input ports, at least two bandstop filter groups, a first low-pass or high-pass filter group, and a first common port.

[0009] The at least two first input ports include a first input port I1,1 and the first input port I 1,2 The first input port I 1,1 is configured to input a first input signal M1 of a first channel having X1 wavelengths. 1,2 is configured to receive a first input signal N1 of a second channel having Y1 wavelengths.

[0010] The at least two bandstop filter groups include a first bandstop filter group and a second bandstop filter group.

[0011] The X1 first band-stop filters in the first band-stop filter group filter the incident input signal M1 of the first channel having the X1 wavelengths as a signal M 1,1 From signal M 1,X1 The X1 wavelengths are split into single wavelength signals of the E 1,1 from the wavelength of E 1,X1 The signal M 1,1 From signal M 1,X1 The single-wavelength signal of X1 channels is 1,1 from the wavelength of E 1,X1 The wavelength of the E-th 1,1 from the wavelength of E 1,X1 The wavelengths of the i-th first bandstop filter among the X1 first bandstop filters are within the stopband ranges of the E 1,i1 A signal with wavelength M 1,i1 and transmits a signal input to a first bandstop filter of a first different wavelength, i1, where X1 is an integer greater than 1 and i1 is an integer ranging from 1 to X1, the first different wavelength being a first bandstop filter of a first different wavelength, i1. 1,1 from the wavelength of E 1,X1 It belongs to the wavelength.

[0012] The Y1 second band-stop filters in the second band-stop filter group filter the incident input signal N1 of the second channel having the Y1 wavelengths as a signal N 1,1 From signal N1,Y1 The Y1 wavelengths are F 1,1 from wavelength F 1,Y1 Signal N 1,1 From signal N 1,Y1 The single-wavelength signal of Y1 channel is the F 1,1 from wavelength F 1,Y1 The wavelength of F is in one-to-one correspondence with that of F. 1,1 from wavelength F 1,Y1 The wavelengths of the j1-th second bandstop filter among the Y1 second bandstop filters are within the stopband range of the corresponding second bandstop filter. 1,j1 Signal with wavelength N 1,j1 and transmits the input signal to a second band stop filter of a second different wavelength, j1, where Y1 is an integer greater than or equal to 1, j1 is an integer ranging from 1 to Y1, and the second different wavelength is F 1,1 from wavelength F 1,Y1 It belongs to the wavelength.

[0013] The W second band-stop filters in the second band-stop filter group are 1,1 From signal M 1,X1 The single-wavelength signals of X1 channels are respectively represented as signals N 1,1 From signal N 1,Y1 This is combined with the Y1 channel single wavelength signal to obtain the W1 channel multi-wavelength signal T 1,t1=1…W1 where W1 is the greater of X1 and Y1. When X1 is greater than Y1, the W1 second bandstop filters include the Y1 second bandstop filters. When X1 is less than Y1, the W1 second bandstop filters are part of the Y1 second bandstop filters. When X1 is equal to Y1, the W1 second bandstop filters are the Y1 second bandstop filters. The j1th second bandstop filter among the Y1 second bandstop filters is a j1th second bandstop filter of the signal M input to the j1th second bandstop filter. 1,i1 and transmit the multi-wavelength signal T 1,t1The multi-wavelength signal T 1,t1 is the Eth 1,i1 and F 1,j1 t1 is an integer ranging from 1 to W1.

[0014] The first low-pass or high-pass filter group includes Z1 first low-pass or high-pass filters, and the multi-wavelength signal P 1,k1=1…Z1 to obtain a single-channel multi-wavelength output signal Q1. 1,k1=1…Z1 A multi-wavelength signal P with W1 channels in 1,t1=1…W1 The multi-wavelength signal P of the t1st channel in 1,t1 is the multi-wavelength signal T with W1 channels. 1,t1=1…W1 The multi-wavelength signal T of the t1st channel in 1,t1 The Z1 first low-pass or high-pass filters include W1 first low-pass or high-pass filters. 1,t1=1…W1 are within the stopband range of the corresponding first low-pass or high-pass filter among the W1 first low-pass or high-pass filters. The t1-th first low-pass or high-pass filter among the W1 first low-pass or high-pass filters is 1,t1 and transmit a signal input to a first low-pass or high-pass filter of a different wavelength, t1, where k1 is an integer ranging from 1 to Z1, and Z1 is an integer greater than or equal to W1.

[0015] The first common port is configured to output the single-channel multi-wavelength output signal Q1 obtained by the first low-pass or high-pass filter group.

[0016] By using WDM components, optical signal processing costs can be reduced.

[0017] According to a second aspect, the present application further provides a WDM component, the WDM component comprising: It includes at least two first input ports, at least one group of combiner splitter structures, and a first common port.

[0018] At least one group of combiner splitter structures includes a first combiner splitter structure.

[0019] The first combiner splitter structure includes two bandpass filters and two total reflection structures.

[0020] The at least two first input ports include a first input port I 1,1 and the first input port I 1,2 The first input port I 1,1 There are two wavelengths, E 1,1 and E 1,2 The first input port I is configured to receive a first input signal M1 of a first channel having a wavelength of 1,2 There are two wavelengths, F 1,1 and F 1,2 The second channel is configured to receive a first input signal N1 having a wavelength of 100 .mu.m.

[0021] The two band-pass filters include a first band-pass filter and a second band-pass filter.

[0022] The two total reflection structures include a first total reflection structure and a second total reflection structure.

[0023] The first bandpass filter is connected to the first input port I 1,1 The first channel input signal M1 having two wavelengths is input from 1,2 transmits wavelength E 1,1 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0024] The first bandpass filter is connected to the first input port I 1,2 The F-th input signal in the second channel N1 having two wavelengths is input from 1,1 and F 1,2The optical fiber is further configured to reflect wavelengths of .

[0025] The first total reflection structure receives the E 1,1 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0026] The second total reflection structure is the first bandpass filter E 1,2 The wavelength of F 1,1 wavelength, and F 1,2 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0027] The second bandpass filter is the E 1,1 transmits wavelength E 1,2 The wavelength of F 1,1 wavelength, and F 1,2 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0028] The first common port is configured to output a single-channel multi-wavelength signal Q1, the wavelengths of the multi-wavelength signal Q1 being the E 1,1 Wavelength of E 1,2 The wavelength of F 1,1 wavelength, and F 1,2 Includes wavelengths of.

[0029] Optical signal processing costs can be reduced by using WDM components because they use bandpass filters, which are easier to implement than bandstop filters, because bandpass filters are simpler to manufacture.

[0030] According to a third aspect, the present application further provides a WDM component, the WDM component comprising: It includes at least two first output ports, at least two bandstop filter groups, a first low-pass or high-pass filter group, and a first common port.

[0031] The first common port is configured to input a single-channel multi-wavelength output signal Q1, and the wavelength of the single-channel multi-wavelength output signal Q1 is the E 1,1from the wavelength of E 1,X1 wavelength, and F 1,1 from wavelength F 1,Y1 Includes wavelengths of.

[0032] The first low-pass or high-pass filter group includes Z1 first low-pass or high-pass filters, and splits the single-channel multi-wavelength output signal Q1 to generate the Z1 channel multi-wavelength signal P 1,k1=1…Z1 The multi-wavelength signal P 1,k1=1…Z1 A multi-wavelength signal P with W1 channels in 1,t1=1…W1 The multi-wavelength signal P of the t1st channel in 1,t1 is the multi-wavelength signal T with W1 channels. 1,t1=1…W1 The multi-wavelength signal T of the t1st channel in 1,t1 The Z1 first low-pass or high-pass filters include W1 first low-pass or high-pass filters. 1,t1=1…W1 are within the stopband range of the corresponding first low-pass or high-pass filter among the W1 first low-pass or high-pass filters. The t1-th first low-pass or high-pass filter among the W1 first low-pass or high-pass filters is 1,t1 and transmits a signal of another wavelength input to the t1th first low-pass or high-pass filter, where k1 is an integer ranging from 1 to Z1, and Z1 is an integer equal to or greater than W1. The W1 second band-stop filters in the second band-stop filter group are configured to reflect the W1 channel multi-wavelength signal T 1,t1=1…W1 , signal M 1,1 From signal M 1,X1 X is a single-wavelength signal with one channel, and N is a signal 1,1 From signal N 1,Y1The signal M is configured to split the signal M into Y1 channel single wavelength signals, W1 being the greater of X1 and Y1. When X1 is greater than Y1, the W1 second bandstop filters include the Y1 second bandstop filters. When X1 is less than Y1, the W1 second bandstop filters are part of the Y1 second bandstop filters. When X1 is equal to Y1, the W1 second bandstop filters are the Y1 second bandstop filters. 1,1 From signal M 1,X1 The single-wavelength signal of X1 channels is 1,1 from the wavelength of E 1,X1 There is a one-to-one correspondence between the wavelength of signal N 1,1 From signal N 1,Y1 The single-wavelength signal of Y1 channel is the F 1,1 from wavelength F 1,Y1 The wavelength of F is in one-to-one correspondence with that of F. 1,1 from wavelength F 1,Y1 The wavelengths of the j1 second bandstop filters are each within the stopband range of the corresponding one of the Y1 second bandstop filters. The j1 second bandstop filter among the Y1 second bandstop filters receives the signal T 1,t1 E in 1,i1 transmits a single wavelength signal M 1,i1 and the signal T input to the j1th second band-elimination filter is 1,t1 F in 1,j1 The wavelength of the single-wavelength signal N 1,j1 where t1 is an integer ranging from 1 to W1, Y1 is an integer greater than or equal to 1, and j1 is an integer ranging from 1 to Y1.

[0033] The Y1 second band-stop filters are 1,1 From signal N 1,Y1The j1-th second bandstop filter among the Y1 second bandstop filters is a second different wavelength and is further configured to transmit a signal input to the j1-th second bandstop filter, the second different wavelength being a F-th channel output signal. 1,1 from wavelength F 1,Y1 It belongs to the wavelength of F 1,j1 does not include the wavelengths of

[0034] The X1 first bandstop filters in the first bandstop filter group are 1,1 From signal M 1,X1 The X1 wavelengths are configured to combine the single-wavelength signals of the X1 channels into a first channel output signal M1 having X1 wavelengths, the X1 wavelengths being 1,1 from the wavelength of E 1,X1 The wavelengths of E 1,1 from the wavelength of E 1,X1 The wavelengths of the i-th first bandstop filter among the X1 first bandstop filters are within the stopband ranges of the E 1,i1 A signal with wavelength M 1,i1 and transmits a signal input to a first bandstop filter of a first different wavelength, i1, where X1 is an integer greater than 1 and i1 is an integer ranging from 1 to X1, the first different wavelength being a first bandstop filter of a first different wavelength, i1. 1,1 from the wavelength of E 1,X1 It belongs to the wavelength.

[0035] The at least two first exit ports are first exit ports I 1,1 and the first exit port I 1,2 The first exit port I 1,1 is configured to output a first output signal M1 of a first channel having X1 wavelengths. 1,2 is configured to output a first output signal N1 of a second channel having Y1 wavelengths.

[0036] In WDM components, band-stop filters are used to split one multi-wavelength signal into multiple multi-wavelength signals, thereby reducing lightwave signal processing costs.

[0037] According to a fourth aspect, the present application further provides a wavelength division multiplexing WDM component, the wavelength division multiplexing WDM component comprising: It includes at least two first exit ports, at least one group of combiner splitter structures, and a first common port.

[0038] The first common port is configured to input a single-channel multi-wavelength signal Q1, the wavelengths of the multi-wavelength signal Q1 being the E 1,1 Wavelength of E 1,2 The wavelength of F 1,1 wavelength, and F 1,2 Includes wavelengths of.

[0039] At least one group of combiner splitter structures includes a first combiner splitter structure.

[0040] The first combiner splitter structure includes two bandpass filters and two total reflection structures.

[0041] The at least two first exit ports are first exit ports I 1,1 and the first exit port I 1,2 The first exit port I 1,1 There are two wavelengths, E 1,1 and E 1,2 The first output port I is configured to output a first output signal M1 of a first channel having a wavelength of 1,2 There are two wavelengths, F 1,1 and F 1,2 1. The optical fiber 10 is configured to output a first output signal N1 in a second channel having a wavelength of 100 .mu.m.

[0042] The two band-pass filters include a first band-pass filter and a second band-pass filter.

[0043] The two total reflection structures include a first total reflection structure and a second total reflection structure.

[0044] The second bandpass filter is connected to the first common port and receives the first E 1,1 transmits wavelength E 1,2 The wavelength of F 1,1 wavelength, and F 1,2 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0045] The first total reflection structure receives the E 1,1 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0046] The second total reflection structure is the second bandpass filter E 1,2 The wavelength of F 1,1 wavelength, and F 1,2 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0047] The first bandpass filter is the E 1,2 and transmits the wavelength F from the second total reflection structure. 1,1 and F 1,2 The first total reflection structure reflects the wavelength of the E 1,1 It reflects the wavelength of E into two wavelengths, 1,1 and E 1,2 A first output signal M1 of the first channel having a wavelength of F 1,1 and F 1,2 2. The optical fiber 10 is configured to obtain an output signal N1 of a second channel having a wavelength of 100 .mu.m.

[0048] In WDM components, bandpass filters are used to split one multi-wavelength signal into multiple multi-wavelength signals, which can reduce the cost of lightwave signal processing. Moreover, compared with bandstop filters, bandpass filters are simpler to manufacture.

[0049] According to a fifth aspect, the present application further provides a wavelength division multiplexing WDM component including two four-port thin film filter TFFs, a first TFF and a second TFF, the four ports including port a, port b, port c and port d, and each of the TFFs including two fiber collimators.

[0050] A first bandpass filter is fixed to the first TFF and disposed between the two fiber collimators of the first TFF, and a second bandpass filter is fixed to the second TFF and disposed between the two fiber collimators of the second TFF.

[0051] A signal 1 having a first wavelength and a second wavelength is input through port a of the first TFF. The first wavelength is within the passband range of the first TFF. The second wavelength is within the stopband range of the first TFF. The signal 1-1 at the first wavelength is output from port d. The signal 1-2 at the second wavelength is output from port b.

[0052] A signal 2 having a third wavelength and a fourth wavelength is input through port c of the first TFF, both of which are within the stopband range of the first TFF, and the signal 2 having the third wavelength and the fourth wavelength is output from port d.

[0053] Port c of the first TFF is connected to port a of the second TFF. Port d of the first TFF is connected to port c of the second TFF.

[0054] The second wavelength is within the passband range of the second TFF. The first wavelength, the third wavelength, and the fourth wavelength are all within the stopband range of the first TFF. The signal 1-1 having the first wavelength, the signal 1-2 having the second wavelength, and the signal 2 having the third wavelength and the fourth wavelength are combined into a signal having four wavelengths output from port d of the second TFF.

[0055] Optionally, each of the above TFFs further comprises a sleeve.

[0056] The WDM component further includes a housing configured to package a plurality of TFFs.

[0057] The WDM components use a TFF structure with built-in bandpass filters, which makes the assembly of the WDM much simpler.

[0058] According to a sixth aspect, the present application further provides a wavelength division multiplexing WDM component including two four-port thin film filter TFFs, a first TFF and a second TFF, the four ports including port a, port b, port c and port d, and each of the TFFs including two fiber collimators.

[0059] A first bandstop filter is fixed to the first TFF and disposed between the two fiber collimators of the first TFF, and a second bandstop filter is fixed to the second TFF and disposed between the two fiber collimators of the second TFF.

[0060] A signal 1 having a first wavelength and a second wavelength is input through port a of the first TFF. The first wavelength is within the stopband range of the first TFF. The second wavelength is within the passband range of the first TFF. The signal 1-1 at the first wavelength is output from port b. The signal 1-2 at the second wavelength is output from port d.

[0061] A signal 2 having a third wavelength and a fourth wavelength is input through port c of the first TFF. Both the third wavelength and the fourth wavelength are within the stopband range of the first TFF. The signal 2 having the third wavelength and the fourth wavelength is output from port b.

[0062] Port b of the first TFF is connected to port a of the second TFF. Port d of the first TFF is connected to port c of the second TFF.

[0063] The second wavelength is within the stopband range of the second TFF. The first wavelength, the third wavelength, and the fourth wavelength are all within the passband range of the first TFF. The signal 1-1 having the first wavelength, the signal 1-2 having the second wavelength, and the signal 2 having the third wavelength and the fourth wavelength are combined into a signal having four wavelengths output from port d of the second TFF.

[0064] Optionally, each of the above TFFs further comprises a sleeve.

[0065] The WDM component further includes a housing configured to package a plurality of TFFs.

[0066] The WDM components use a TFF structure with built-in band-stop filters, which makes the assembly of the WDM much simpler.

[0067] According to a seventh aspect, the present application further provides a wavelength division multiplexing WDM component including a Z-block structure. A plurality of isosceles right triangular prism notches are separately disposed on two sides of the Z-block structure. The right angle surfaces of the isosceles right triangular prisms are perpendicular to the notches. The bevels of the isosceles right triangular prisms of the notches on the same side are disposed in parallel. The notches on the two sides are disposed in a peer-to-peer manner opposite to the bevels disposed in parallel. The notch on the first side includes a notch used for a first input port. The notch on the second side includes a notch used for a first common port. A first triangular prism filter is disposed on each of the piano titch of the notch used for the first input port and the notch used for the first input port. A band-stop filter thin film is plated on the bevels of the first triangular prism filter. A second triangular prism filter is disposed on each of the notches used for the first common port and the piano titch of the notches used for the first common port. A first low-pass or high-pass filter thin film is plated on the bevel of the second triangular prism filter. The band-stop filter thin film is configured to reflect wavelengths within a specific range. The first entrance port is configured to input a single-channel signal having X wavelengths. The amount of wavelengths X of the signal input through at least one notch used for the first entrance port among the plurality of notches is an integer greater than 1. The first low-pass or high-pass filter thin film is configured to combine signals input through the plurality of first entrance ports and obtained based on the single-channel multi-wavelength signal passing through the band-stop filter thin film to obtain a single-channel signal having Y wavelengths. Y is the sum of the amount of wavelengths X input through all the first entrance ports. The first common port is configured to output a single channel signal having Y wavelengths and obtained through synthesis, and the bevel of the first triangular prism filter is parallel to the bevel of the isosceles right triangular prism of the notch in which the first triangular prism filter is disposed, and the bevel of the second triangular prism filter is parallel to the bevel of the isosceles right triangular prism of the notch in which the second triangular prism filter is disposed.

[0068] The WDM components use a Z-block structure with built-in band-stop filter membranes. With Z-blocks, the components can be smaller in size and lower in cost.

[0069] Optionally, a first low-pass or high-pass filter thin film plated on the bevel of a second triangular prism filter disposed in the piano edge of the notch used for the first common port is used for total internal reflection.

[0070] Optionally, the piano titch of the notch used for the first entrance port is further used for the second entrance port. The notches on the first side further include a notch used for the second common port. A third triangular prism filter is disposed on each of the piano titch of the notch used for the second common port and the notch used for the second common port. A second low-pass or high-pass filter thin film is plated on the bevel of the third triangular prism filter. The second low-pass or high-pass filter thin film is configured to combine signals having M wavelengths and obtained through combining the single-channel signals input through the second entrance port passing through the band-stop filter thin film to obtain a single-channel signal having N wavelengths. The second common port is configured to output the single-channel signal having N wavelengths and obtained through combining. The amount M of wavelengths of the signal input through at least one notch used for the second entrance port in the multiple piano titches is an integer greater than 1. N is the sum of the amount M of wavelengths input through all the second entrance ports. The bevel of the third triangular prism filter is parallel to the bevel of the isosceles right angle triangular prism in the notch in which the third triangular prism filter is disposed.

[0071] According to an eighth aspect, the present application further provides a communication device, comprising a WDM component as provided in any one of the above aspects.

[0072] According to a ninth aspect, the present application further provides a WDM component manufacturing method, by disposing and / or connecting components in a WDM component provided in any one of the above aspects, a WDM component according to any one of the above aspects is obtained.

[0073] For possible implementations of the aspects provided in this application, please refer to the description in the claims, and the details will not be described again in this specification.

[0074] By using the above WDM components, the optical signal processing cost, the link insertion loss, and the link configuration complexity are reduced, and therefore the manual configuration cost is reduced. [Brief description of the drawings]

[0075] [Figure 1] A diagram of the WDM structure connected with BiDi-DSFP. [Diagram 2] 1 is a diagram of a structure of a WDM component according to an embodiment of the present application. [Diagram 3] 1 is a diagram of a structure of a double density WDM component according to an embodiment of the present application. [Figure 4] FIG. 2 is a diagram of a structure of a WDM component based on a Z-block according to an embodiment of the present application. [Diagram 5] FIG. 2 is a diagram of the structure of a band-stop TFF according to an embodiment of the present application. [Figure 6] FIG. 2 is a diagram of a structure of a WDM component based on a band-stop TFF according to an embodiment of the present application. [Figure 7] FIG. 2 is a diagram of another structure of a WDM component according to an embodiment of the present application. [Figure 8] FIG. 2 is a diagram of yet another structure of a WDM component according to an embodiment of the present application. [Figure 9] FIG. 2 is a diagram of another structure of a double-density WDM component according to an embodiment of the present application. [Figure 10] FIG. 2 is a diagram of another structure of a TFF according to an embodiment of the present application. [Figure 11]1 is a diagram of another structure of a WDM component based on a band TFF according to an embodiment of the present application. [Figure 12] FIG. 13 is a diagram of yet another structure of a WDM component based on band TFF according to an embodiment of the present application. [Figure 13] FIG. 2 is a diagram of another structure of a WDM component based on a band TFF according to an embodiment of the present application. [Figure 14] FIG. 2 is a diagram of another structure of a WDM component based on a band-stop TFF according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0076] The technical solutions of the present application are described below with reference to the accompanying drawings.

[0077] The technical solutions in the embodiments of the present application may be applied to various communication systems, such as a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a 5th generation (5G) system, a new radio (NR), a wireless local area network (WLAN) system, a broadcasting / television service (BTS) system, or a future next-generation communication system.

[0078] The access network device in the embodiment of the present application may be a device configured to communicate with a terminal device. The access network device may also be called an access device or a radio access network device, may be an evolved NodeB (eNB or eNodeB) in an LTE system, or may be a radio controller in a cloud radio access network (CRAN) scenario. Alternatively, the access network device may be a relay station, an access point, an in-vehicle device, a wearable device, an access network device in a 5G network, or an access network device in a future evolved PLMN network, and may be an access point (AP) in a WLAN, a node in a BTS, or a gNB in ​​a new radio (NR) system. This is not limited in the embodiment of the present application.

[0079] In addition, in an embodiment of the present application, the access network device is a device in a radio access network (RAN), or in other words, a RAN node that connects a terminal device to a wireless network. For example, by way of example and not limitation, the access network device may be a gNB, a transmission reception point (TRP), an evolved NodeB (eNB), a radio network controller (RNC), a NodeB (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., a home evolved NodeB or home NodeB, HNB), a baseband unit (BBU), a wireless fidelity (Wi-Fi) access point (AP), etc. In a network structure, the access network device may include a RAN device including a central unit (CU) node and a distributed unit (DU) node, or may be a RAN device including a CU control plane node (CU-CP node), a CU user plane node (CU-UP node), and a DU node.

[0080] An access network device provides services to a cell. A terminal device communicates with the access network device by using a transmission resource (e.g., a frequency domain resource, in other words, a spectrum resource) used for the cell. A cell may be a cell corresponding to an access network device (e.g., a base station), and a cell may belong to a macro base station or a base station corresponding to a small cell. A small cell in this specification may include a metro cell, a micro cell, a pico cell, a femto cell, etc. These small cells have characteristics of small coverage and low transmission power, and are suitable for providing high-rate data transmission services.

[0081] In an embodiment of the present application, the core network device is a device in a core network (CN) that provides service support to a terminal device. Currently, some examples of core network devices are an access and mobility management function (AMF) entity, a session management function (SMF) entity, a user plane function (UPF) entity, etc., which are not described one by one in this specification. For example, the AMF entity may be responsible for the access management and mobility management of the terminal. The SMF entity may be responsible for session management, such as user session establishment. The UPF entity may be a functional entity on the user plane, and is mainly responsible for connecting to an external network.

[0082] It should be noted that entities in this application may also be referred to as network elements or functional entities. For example, an AMF entity may also be referred to as an AMF network element or an AMF functional entity. In another example, an SMF entity may also be referred to as an SMF network element, an SMF functional entity, etc.

[0083] The technical solutions in the embodiments of the present application may be applied to optical fiber communications in a communication system, including, but not limited to, optical fiber communications between access network devices, optical fiber communications between access network devices and core network devices, optical fiber communications between CU nodes and DU nodes, optical fiber communications between core network devices, optical fiber communications between BBUs of access network devices and radio units (RUs), etc.

[0084] Wavelength division multiplexing (WDM) is a technology that combines multiple optical signals of different wavelengths through a multiplexer and couples this signal into the same optical fiber for data transmission. Wavelength division multiplexing (WDM) is used to combine optical carrier signals of two or more wavelengths (carrying various information) at the transmitting end through a multiplexer and couple this signal into the same optical fiber of an optical line for transmission. At the receiving end, the optical carriers of different wavelengths are separated through a demultiplexer and then processed by an optical receiver to restore the original signal. WDM is characterized by high capacity, long distance, and low cost. High capacity means that the light in the optical fiber is composed of multiple wavelengths, and each of the wavelengths can carry different information independently. In this way, more information can be transmitted. Long distance means that the optical transmission loss is much lower than the electrical transmission loss. Low cost means that the cost of manufacturing optical fiber is low. WDM can be classified into dense wavelength division multiplexing (DWDM) and coarse wavelength division multiplexing (CWDM). In DWDM systems, the spacing between wavelengths is small, for example 0.8 nm, 0.4 nm, or 0.2 nm. In CWDM systems, the spacing between wavelengths is large, for example 20 nm. Currently, DWDM is mainstream. The amount of optical wavelengths that can be used for transmission in a single fiber is 32, 40, 80, 96, 106, or 160. Currently, 40-wavelength and 80-wavelength systems are mostly used.

[0085] A small form-factor pluggable (SFP) is an optical module that can implement optical-electrical conversion, i.e., modulate an electrical signal into a light wave to obtain an optical signal, and / or demodulate the electrical signal from the optical signal. A single-channel single-wavelength optical signal output by the SFP or input into the SFP is carried on an optical fiber for transmission. To improve the transmission efficiency, through WDM, the single-fiber single-wavelength signal output by the SFP and the single-fiber single-wavelength signal input into the SFP can be combined into a single-fiber multi-wavelength signal for transmission.

[0086] Currently, industrial applications of dual small form-factor pluggable (DSFP) are being implemented due to the advantages of dual channel interface and the same encapsulation style as small form-factor pluggable (SFP). Although limited by the optical fiber density supported by the SFP encapsulation style, DSFP currently supports dual channel single fiber bidirectional optical signaling, i.e. BiDi (bidirectional) optical signaling.

[0087] FIG. 1 is a diagram of a WDM structure connected with BiDi-DSFP. In this figure, an example is used in which there is a three-channel BiDi-DSFP. The three-channel BiDi-DSFP component processes signals of wavelengths λ1 to λ6 of six channels. CWDM is used as an example. For example, the wavelengths λ1 to λ6 are 1270 nm, 1290 nm, 1310 nm, 1330 nm, 1350 nm and 1370 nm. Each BiDi-DSFP component of a channel processes signals of two channels having two wavelengths. For example, both signals of the two channels processed by the BiDi-DSFP of the first channel include λ1 and λ4, both signals of the two channels processed by the BiDi-DSFP of the second channel include λ2 and λ5, and both signals of the two channels processed by the BiDi-DSFP of the third channel include λ3 and λ6. In order to combine six channel signals each having two wavelengths processed by a three channel BiDi-DSFP component into two channel signals each having six wavelengths, the WDM structure shown in FIG. 1 uses six 1×2 WDM components and two 1×6 WDM components, and the three 1×2 WDM components obtain six signals processed by one 1×6 WDM component, and the six signals each have wavelengths from λ1 to λ6. The arrows in the accompanying drawings of this application indicate light wave combining, but may be understood not to represent the transmission direction of the signals carried by the light waves. The signals carried by the light waves may be in the same direction, or some signals may be opposite to other signals. For example, the signals carried by λ1 and λ4 may be opposite. This is not limited in this specification.

[0088] It can be seen that in the solution of FIG. 1, multiple WDM components are required to form a WDM structure. For example, in addition to two 1×6 WDM components, six 1×2 WDM components are also required. In this case, the cost is high, the link insertion loss is large, the link configuration is complicated, and the manual configuration cost is increased. However, in the current WDM components, a single WDM component does not support multiple channel single fiber multi-wavelength optical signals (also called multiple path single fiber multi-wavelength optical signals or multiple single fiber multi-wavelength optical signals), for example, multiple channel (also called dual path) single fiber multi-directional optical signals of DSFP.

[0089] In view of this, the embodiments of the present application provide multiple WDM components so that a single WDM component can support multiple-channel single-fiber multi-wavelength optical signal multiplexing processing. Multiplexing processing and demultiplexing processing may be understood as two inverse processing. The WDM components provided in the embodiments of the present application can also support demultiplexing processing, which splits a single-fiber multi-wavelength optical signal into multiple-channel single-fiber multi-wavelength optical signals. In the following embodiments, only multiplexing processing is used as an example for explanation, and demultiplexing processing can be obtained by reversing the multiplexing processing. Details will not be described again. By using the WDM components provided in the embodiments of the present application, optical signal processing costs, link insertion losses, and link configuration complexity are reduced. Thus, manual configuration costs are reduced.

[0090] FIG. 2 is a diagram of a structure of a WDM component according to an embodiment of the present application.

[0091] WDM components use band-stop filters, which reflect only wavelengths within a specific range and transmit wavelengths outside this specific range.

[0092] FIG. 2 is explained by using an example where a single-fiber multi-wavelength signal processed by a WDM component contains N channels, each of which contains M wavelengths, with an offset of N wavelengths between any two wavelengths in the M wavelengths. Through the multiplexing process of the WDM component, M*N A single-fiber multi-wavelength signal can be obtained having wavelengths of M=N, M=M, N=N, where M is a positive integer greater than or equal to 2, and N is a positive integer greater than or equal to 2.

[0093] For example, when the WDM component implements CWDM, a three channel single-fiber multi-wavelength signal may be included, and the wavelengths included by the three channel single-fiber multi-wavelength signal are λ1 and λ4, λ2 and λ5, and λ3 and λ6, respectively.

[0094] The WDM components are: a first input port group 103, the first input port group including N first input ports 1003; N bandstop filter groups 101, each of the N bandstop filter groups 101 including M bandstop filters 1001; a first low-pass or high-pass filter group 102 including M low-pass or high-pass filters 1002, each of which may be a low-pass or high-pass filter, but is not limited herein; A first common port 104 and may include.

[0095] The M wavelengths contained in each single-fiber, multi-wavelength signal of a channel are respectively within the stopband ranges of the M band-stop filters 1001 for processing the single-fiber, multi-wavelength signal. In this way, by passing through the M band-stop filters 1001 successively, the single-fiber, multi-wavelength signal of a channel can be split into M single-wavelength signals of the channel.

[0096] The M band-stop filters 1001 in the band-stop filter group of the N channels are also arranged correspondingly. Specifically, the single-wavelength signal of one channel obtained through splitting the single-fiber multi-wavelength signal of each of the channels passes through the corresponding band-stop filter 1001 in another band-stop filter group to obtain a signal of one channel having N wavelengths. For example, a single-channel single-wavelength signal, e.g., λ1, obtained through splitting a single-fiber multi-wavelength signal of a first channel, passes through a band-stop filter 1001 in a band-stop filter group of a second channel and is combined with a single-channel single-wavelength signal, e.g., λ2, obtained through splitting a single-fiber multi-wavelength signal of the second channel to obtain a single-channel multi-wavelength signal, e.g., λ1 and λ2, and then passes through a band-stop filter 1001 in a band-stop filter group of a third channel and is combined with a single-channel single-wavelength signal, e.g., λ3, obtained through splitting a single-fiber multi-wavelength signal of the third channel to obtain a single-channel multi-wavelength signal, e.g., λ1, λ2, and λ3. The rest can be deduced by analogy. In this way, N wavelengths, e.g., λ1 to λ3, are combined with the single-channel single-wavelength signal, e.g., λ1 to λ3, to obtain a single-channel multi-wavelength signal, e.g., λ1, λ2, and λ3. N In this way, M channel signals each having N wavelengths are obtained.

[0097] The M low-pass or high-pass filters 1002 in the first low-pass or high-pass filter group 102 are also arranged corresponding to the M band-stop filters 1001 in each band-stop filter group of the channel, to successively reflect the input light wave to the next low-pass or high-pass filter 1002 to obtain a single-channel signal having M*N wavelengths, and input the single-channel signal having M*N wavelengths to the first common port 104.

[0098] Optionally, in the WDM component shown in FIG. 2 , the first low-pass or high-pass filter 1002-1 in the first low-pass or high-pass filter group 101, i.e. the first low-pass or high-pass filter corresponding to the band-stop filter from which the first single-wavelength signal is obtained through splitting in the M band-stop filters 1001 of each of the channels, is a total reflector.

[0099] By using the WDM component shown in Figure 2, a single WDM component can combine multiple channel single-fiber multi-wavelength signals into a single channel single-fiber multi-wavelength signal. This reduces optical signal processing costs, link insertion losses, and link configuration complexity. Thus, manual configuration costs are reduced.

[0100] The amount of wavelengths included in the single-fiber, multi-wavelength signal of N channels processed by the WDM component in this embodiment of the present application may be determined separately. In other words, the amount of wavelengths may be the same or different, and the wavelength values ​​included in the single-fiber, multi-wavelength signal of N channels may also be determined separately. For example, the amount of wavelengths and the wavelength values ​​may be determined based on system setting requirements, which are not limited in this specification.

[0101] Therefore, based on the principle of the WDM building block of FIG. 2, an embodiment of the present application may provide a more general WDM building block.

[0102] The WDM components are: at least two first input ports, at least two band-stop filter groups, a first low-pass or high-pass filter group, and a first common port. may include.

[0103] The at least two first input ports include a first input port I 1,1 and the first input port I 1,2 The first input port I 1,1is configured to input a first input signal M1 of a first channel having X1 wavelengths. 1,2 is configured to receive a first input signal N1 of a second channel having Y1 wavelengths.

[0104] The at least two bandstop filter groups include a first bandstop filter group and a second bandstop filter group.

[0105] The X1 first band-stop filters in the first band-stop filter group filter the incident input signal M1 of the first channel having the X1 wavelengths as a signal M 1,1 From signal M 1,X1 The X1 wavelengths are split into single wavelength signals of the E 1,1 from the wavelength of E 1,X1 The signal M 1,1 From signal M 1,X1 The single-wavelength signal of X1 channels is 1,1 from the wavelength of E 1,X1 The wavelength of the E-th 1,1 from the wavelength of E 1,X1 The wavelengths of the i-th first bandstop filter among the X1 first bandstop filters are within the stopband ranges of the E 1,i1 A signal with wavelength M 1,i1 and transmits a signal input to a first bandstop filter of a first different wavelength, i1, where X1 is an integer greater than 1 and i1 is an integer ranging from 1 to X1, the first different wavelength being a first bandstop filter of a first different wavelength, i1. 1,1 from the wavelength of E 1,X1 It belongs to the wavelength.

[0106] The Y1 second band-stop filters in the second band-stop filter group filter the incident input signal N1 of the second channel having the Y1 wavelengths as a signal N 1,1 From signal N 1,Y1 The Y1 wavelengths are F 1,1from wavelength F 1,Y1 Signal N 1,1 From signal N 1,Y1 The single-wavelength signal of Y1 channel is the F 1,1 from wavelength F 1,Y1 The wavelength of F is in one-to-one correspondence with that of F. 1,1 from wavelength F 1,Y1 The wavelengths of the j1-th second bandstop filter among the Y1 second bandstop filters are within the stopband range of the corresponding second bandstop filter. 1,j1 Signal with wavelength N 1,j1 and transmits the signal input to a second bandstop filter of a second different wavelength, j1, where Y1 is an integer equal to or greater than 1 and j1 is an integer ranging from 1 to Y1, the second different wavelength being F1. 1,1 from wavelength F 1,Y1 It belongs to the wavelength.

[0107] The W second band-stop filters in the second band-stop filter group are 1,1 From signal M 1,X1 The single-wavelength signals of X1 channels are respectively represented as signals N 1,1 From signal N 1,Y1 This is combined with the Y1 channel single wavelength signal to obtain the W1 channel multi-wavelength signal T 1,t1=1…W1 where W1 is the greater of X1 and Y1. When X1 is greater than Y1, the W1 second bandstop filters include the Y1 second bandstop filters. When X1 is less than Y1, the W1 second bandstop filters are part of the Y1 second bandstop filters. When X1 is equal to Y1, the W1 second bandstop filters are the Y1 second bandstop filters. The j1th second bandstop filter among the Y1 second bandstop filters is a j1th second bandstop filter of the signal M input to the j1th second bandstop filter. 1,i1 and transmit the multi-wavelength signal T 1,t1 The multi-wavelength signal T 1,t1 is the Eth 1,i1 and F 1,j1t1 is an integer ranging from 1 to W1.

[0108] The first low-pass or high-pass filter group includes Z1 first low-pass or high-pass filters, and the multi-wavelength signal P 1,k1=1…Z1 to obtain a single-channel multi-wavelength output signal Q1. 1,k1=1…Z1 A multi-wavelength signal P with W1 channels in 1,t1=1…W1 The multi-wavelength signal P of the t1st channel in 1,t1 is the multi-wavelength signal T with W1 channels. 1,t1=1…W1 The multi-wavelength signal T of the t1st channel in 1,t1 The Z1 first low-pass or high-pass filters include W1 first low-pass or high-pass filters. 1,t1=1…W1 are within the stopband range of the corresponding first low-pass or high-pass filter among the W1 first low-pass or high-pass filters. The t1-th first low-pass or high-pass filter among the W1 first low-pass or high-pass filters is 1,t1 and transmit a signal input to a first low-pass or high-pass filter of a different wavelength, t1, where k1 is an integer ranging from 1 to Z1, and Z1 is an integer greater than or equal to W1.

[0109] The first common port is configured to output the single-channel multi-wavelength output signal Q1 obtained by the first low-pass or high-pass filter group.

[0110] X1=Y1=Z1=W1=M, and the Eth wavelength included in X1 wavelengths 1,1 from the wavelength of E 1,X1 The wavelengths of λ1 and λ 1+N …, λ 1+(M-1)*N and the Fth wavelength included in the Y1 wavelengths is 1,1 from wavelength F 1,Y1 The wavelengths of λ2 and λ 2+N , …, λ 2+(M-1)*N , the WDM component may be understood to be the WDM component shown in FIG.

[0111] The WDM component shown in FIG. 2 is a quasi-linear optical fiber that transmits M*N wavelengths, i.e., λ1 to λ M*N The embodiment of the present application further provides a double-density WDM component for multiplexing N band-stop filter groups 101, so that the double-density WDM component can be used together with BiDi-DSFP, i.e., connected with the BiDi-DSFP component, to obtain a signal having M*N wavelengths of two channels.

[0112] FIG. 3 is a diagram of the structure of a WDM component according to an embodiment of the present application, namely a double density WDM component.

[0113] Based on the WDM component shown in FIG. 2, the WDM component may further include a second input port group 103', a second low-pass or high-pass filter group 102', and a second common port 104'.

[0114] The second low-pass or high-pass filter group 102' may include M second low-pass or high-pass filters 1002', and the second input port group 103' includes N second input ports 1003'.

[0115] The WDM component shown in FIG. 3 is explained by using an example in which the light waves input by the N second input ports 1003′ are the same as the light waves input by the N first input ports 1003, respectively.

[0116] The N band-stop filter groups 101 in the WDM component further process the N-channel single-fiber multi-wavelength signal input through the second input port group 103'. The processing process is the same as that of processing the N-channel single-fiber multi-wavelength signal input through the first input port group 103 to obtain M-channel signals each having N wavelengths. The specific processing process will not be described again in this specification.

[0117] The M second low-pass or high-pass filters 1002' have the same functions as the M first low-pass or high-pass filters 1002 in Figure 2, and successively reflect the input light wave to the next low-pass or high-pass filter 1002' to obtain a single-channel signal having M*N wavelengths, and input the single-channel signal having M*N wavelengths into the second common port 104'.

[0118] Optionally, in the WDM component shown in FIG. 3, the first second low-pass or high-pass filter 1002'-1 in the second low-pass or high-pass filter group 102', i.e. the second low-pass or high-pass filter corresponding to the band-stop filter from which the first single-wavelength signal is obtained through a split in the M band-stop filters 1001 of each of the channels, is a total reflector.

[0119] By using WDM components, multiple channel double-density single-fiber multi-wavelength signals can be combined into a single channel single-fiber multi-wavelength signal, or a double-density single-channel single-fiber multi-wavelength signal can be split into multiple channel single-fiber multi-wavelength signals. This reduces optical signal processing costs, link insertion losses, and link configuration complexity. Thus, manual configuration costs are reduced.

[0120] As explained above, the WDM component shown in FIG. 3 is explained by using an example in which the light waves input by the N second input ports 1003′ are the same as the light waves input by the N first input ports 1003, respectively.

[0121] Based on the principles of the WDM components of FIGS. 2 and 3, embodiments of the present application may provide a more general double-density WDM component.

[0122] Based on the more general WDM component provided in the embodiment shown in FIG. 2, the double density WDM component: at least two second input ports, a second low-pass or high-pass filter group, and a second common port; Further includes:

[0123] The at least two second input ports include second input port I 2,1 and the second input port I 2,2 The second input port I 2,1 is configured to input a second input signal M2 of the first channel having X2 wavelengths. 2,2 is configured to receive a second input signal N2 of a second channel having Y2 wavelengths.

[0124] The X2 first band-stop filters among the X1 first band-stop filters in the first band-stop filter group filter out the X2 wavelengths of the first channel incident input signal M2 having X3 wavelengths into the signal M 2,1 From signal M 2,X2 The X2 wavelengths are further configured to split the X2 channels into single wavelength signals, 2,1 from the wavelength of E 2,X2 The signal M 2,1 From signal M 2,X2 The single-wavelength signal of X2 channels is 2,1 from the wavelength of E 2,X2 The wavelength of the E-th 2,1 from the wavelength of E 2,X2 The wavelengths of the i-th first bandstop filter among the X1 first bandstop filters are within the stopband ranges of the X2 first bandstop filters. 2,i1 A signal with wavelength M 2,i1 and transmits the signal input to the i1 th first bandstop filter, where X2 is an integer greater than or equal to 1 and less than or equal to X1, and the third different wavelength is a 2,1 from the wavelength of E 2,X2 and X3 is an integer equal to or greater than X2.

[0125] The Y2 second band-stop filters in the Y1 second band-stop filters of the second band-stop filter group filter out the Y2 wavelengths in the incident input signal N2 of the second channel having Y3 wavelengths to the signal N 2,1 From signal N 2,Y2 The Y2 wavelengths are further configured to split the F1 signal into single wavelength signals of Y2 channels, 2,1 from wavelength F 2,Y2 Signal N 2,1 From signal N 2,Y2 The Y2 channel single wavelength signal is the F 2,1 from wavelength F 2,Y2 The wavelength of F is in one-to-one correspondence with that of F. 2,1 from wavelength F 2,Y2 The wavelengths of the j1-th second bandstop filter among the Y1 second bandstop filters are within the stopband range of the corresponding second bandstop filter among the Y2 second bandstop filters. 2,j1 Signal with wavelength N 2,j1 and transmits a signal having a fourth different wavelength, which is input to the j1-th second bandstop filter. The fourth different wavelength is 2,1 from wavelength F 2,Y2 Y2 is an integer greater than or equal to 1 and less than or equal to Y1, and Y3 is an integer greater than or equal to Y2.

[0126] The W2 first bandstop filters in the first bandstop filter group are 2,1 From signal N 2,X2 The single-wavelength signals of Y2 channels are respectively represented as signals M 2,1 From signal M 2,Y1 This is combined with the single-wavelength signal of X2 channels to obtain a multi-wavelength signal T 2,t2=1…W2The signal processing apparatus is further configured to obtain a first band-stop filter of the signal N input to the first band-stop filter. W2 is a larger value of X2 and Y2. When X2 is larger than Y2, the W2 first band-stop filters include the X2 first band-stop filters. When X2 is smaller than Y2, the W2 first band-stop filters are a part of the X2 first band-stop filters. When X2 is equal to Y2, the W2 first band-stop filters are the X2 first band-stop filters. The i1th first band-stop filter in the X1 first band-stop filters is a first band-stop filter of the signal N input to the i1th first band-stop filter. 2,j1 Transmitting the multi-wavelength signal T 2,t2 The multi-wavelength signal T 2,t2 is the Eth 2,i1 and F 2,j1 t2 is an integer ranging from 1 to W2.

[0127] The second low-pass or high-pass filter group includes Z2 first low-pass or high-pass filters, and the multi-wavelength signal P 2,k2=1…Z2 to obtain a single-channel multi-wavelength output signal Q2. 2,k2=1…Z2 A multi-wavelength signal P with W2 channels in 2,t2=1…W2 The multi-wavelength signal P of the t2th channel in 2,t2 is a multi-wavelength signal T with W2 channels. 2,t2=1…W2 The multi-wavelength signal T of the t2th channel in 2,t2 The Z2 first low-pass or high-pass filters include W2 first low-pass or high-pass filters. 2,t1=1…W2 is within the stopband range of the corresponding first low-pass or high-pass filter among the W2 first low-pass or high-pass filters. The t2-th first low-pass or high-pass filter among the W2 first low-pass or high-pass filters is 2,t2 and transmit a signal input to a first low-pass or high-pass filter of a second wavelength, t2, where k2 is an integer ranging from 1 to Z2, and Z2 is an integer greater than or equal to W2.

[0128] The second common port is configured to output the single-channel multi-wavelength output signal Q2 obtained by the second low-pass or high-pass filter group.

[0129] X3 = X2 = Y3 = Y2 = Z2 = W2 = M, and the Eth wavelength included in the X2 wavelengths 2,1 from the wavelength of E 2,X2 The wavelengths of λ1 and λ 1+N , …, λ 1+(M-1)*N And F 2,1 from wavelength F 2,Y2 The wavelengths of λ2 and λ 2+N , …, λ 2+(M-1)*N , the double density WDM component may be understood to be the double density WDM component shown in FIG.

[0130] Based on the structure of the WDM component shown in FIG. 2 or FIG. 3, the embodiment of the present application further provides a WDM component based on a Z-block.

[0131] FIG. 4 is a diagram of a Z-block based WDM building block according to an embodiment of the present application.

[0132] The WDM component is described based on the example in which each of the N-channel single-fiber multi-wavelength signals in the WDM component shown in FIG. 2 or FIG. 3 includes two wavelengths.

[0133] The WDM components are: Z-Block Structure may include.

[0134] N isosceles right triangular prism notches are separately disposed on two sides of the Z-block structure. The right angle surfaces of the isosceles right triangular prisms are perpendicular to the notches. The bevels of the isosceles right triangular prisms of the notches on the same side are disposed in parallel. The notches on the two sides are disposed in a peer-to-peer manner opposite to the bevels disposed in parallel. The notches on the first side include a notch used for the first entrance port 1003. The notches on the second side include a notch used for the first common port 104. A first triangular prism filter is disposed on each of the piano pits of the notch used for the first entrance port 1003 and the notch used for the first entrance port. A band-stop filter thin film is plated on the bevels of the first triangular prism filter. The second triangular prism filter is disposed on each of the notches used for the first common port and the piano edge of the notch used for the first common port. A first low-pass or high-pass filter thin film is plated on the bevel of the second triangular prism filter. The band-stop filter thin film is a band-stop filter 1001 included in at least two band-stop filter groups. The first low-pass or high-pass filter thin film is a low-pass or high-pass filter 1002 included in the first low-pass or high-pass filter group.

[0135] Optionally, a first low-pass or high-pass filter thin film plated on the bevel of a second triangular prism filter disposed in the piano edge of the notch used for the first common port is used for total reflection, i.e., the first low-pass or high-pass filter 1002-1.

[0136] Optionally, the piano edge of the notch used for the first entrance port is further used for the second entrance port 1003'. The notches on the first side further include a notch used for the second common port 104'. A third triangular prism filter is disposed on each of the piano edges of the notch used for the second common port and the notch used for the second common port. A second low-pass or high-pass filter thin film is plated on the bevel of the third triangular prism filter. The second low-pass or high-pass filter thin film is a low-pass or high-pass filter 1002' included in the second low-pass or high-pass filter group. In this way, a double-density WDM component can be implemented to further reduce optical signal processing costs, link insertion losses, and link configuration complexity. Thus, manual configuration costs are reduced.

[0137] Optionally, a second low-pass or high-pass filter thin film plated on the bevel of a third triangular prism filter disposed in the piano edge of the notch used for the second common port is used for total reflection, i.e., the first second low-pass or high-pass filter 1002'-1.

[0138] The above WDM component shown in Figure 4 is implemented based on a Z-block structure. An embodiment of the present application further provides a WDM component based on a thin-film filter (TFF).

[0139] FIG. 5 is a diagram of the structure of a TFF used for bandstop filtering.

[0140] The TFF includes four ports, which are port a, port b, port c, and port d, respectively.

[0141] Optionally, the TFF may include a sleeve and two fiber collimators.

[0142] The bandstop filter 1001 is fixed to the TFF and may optionally be placed between two fiber collimators of the TFF.

[0143] For example, a single multi-wavelength signal having wavelengths λ1 to λ6 is input through port a of the TFF, and the band-stop filter 1001 reflects wavelength λ1 and transmits the other wavelengths. Port b outputs a single multi-wavelength signal having wavelength λ1. Port d outputs signals having wavelengths λ2 to λ6.

[0144] Optionally, the TFF may further implement demultiplexing processing for the multi-wavelength signals of another channel. For example, if a single multi-wavelength signal having wavelengths λ1 to λ6 is input through port c, port d outputs a single multi-wavelength signal having wavelength λ1, and port b outputs signals having wavelengths λ2 to λ6.

[0145] Based on the TFF shown in FIG. 5, the WDM components provided in the embodiment of the present application are shown in FIG.

[0146] The WDM building block includes a band-stop TFF group 101 of N channels, which corresponds to the band-stop filter group 101 of Figure 2 or Figure 3, respectively. Each TFF group of channels includes M band-stop TFFs 1001, which corresponds to the band-stop filters 1001 of Figure 2 or Figure 3, respectively.

[0147] The WDM component further includes a TFF group 102 of one channel, for example, a first low-pass or high-pass TFF group 102, corresponding to the first low-pass or high-pass filter group 102 in Fig. 2 or Fig. 3. The first low-pass or high-pass TFF group 102 includes M first low-pass or high-pass TFFs 1002, which respectively correspond to the first low-pass or high-pass filters 1002 in Fig. 2 or Fig. 3. In other words, the first low-pass or high-pass filter 1002 is fixed to the M first low-pass or high-pass TFFs 1002.

[0148] Optionally, the WDM component may further include a TFF group 102' of one channel, for example, a second low-pass or high-pass TFF group 102', corresponding to the second low-pass or high-pass filter group 102' in Fig. 2 or Fig. 3. The second low-pass or high-pass TFF group 102' includes M second low-pass or band TFFs 1002', which respectively correspond to the first low-pass or band filter 1002' in Fig. 2 or Fig. 3. In other words, the second low-pass or band filter 1002' is fixed to the M second low-pass or high-pass TFFs 1002'.

[0149] The connection relationships between the TFFs included in the WDM component are shown in Fig. 6. For the vth band-stop TFF in each of the columns of the N-channel band-stop TFF group 101, i.e., in the vth row, a signal having multiple wavelengths is input through port a of the band-stop TFF. For example, the multiple wavelengths are λ v , λ v+N , …, λ v+(M-1)*N or a combination thereof, where v∈{1,2,...,N}, M and N are integers equal to or greater than 2, and a signal having multiple wavelengths is output from port b. For example, the multiple wavelengths may be λ v , λ v+1 , λ v+2 , …, λ v+(N-1) or a combination thereof, where v∈{1,2,...,N}. The port d of the vth band-stop TFF is connected to the port a of the next band-stop TFF in the row in which the vth band-stop TFF is located. For example, if the vth band-stop TFF is located in the uth column, then the next band-stop TFF is the band-stop TFF in the (u+1)th column. Thus, for example, u is an integer ranging from 1 to M, and λ v , λ v+N , …, λ v+(M-1)*N The wavelength λ within the stopband range of the band-eliminating TFF in the vth row and uth column of v+(u-1)*NThe wavelengths other than λ are input to the next band-stop TFF in the row in which the vth band-stop TFF is located, i.e., the band-stop TFF in the vth row and the (u+1)th column, where v∈{1,2,...,N}, and M and N are integers equal to or greater than 2. Port b of the band-stop TFF in the vth row and the uth column is connected to port c of the band-stop TFF in the (v+1)th row and the uth column. In this way, the band-stop TFF in the Nth row and the uth column is connected to multiple wavelengths λ v From λ v+(N-1) to the first low- or high-band TFF group 102, for example to port a or port c of the u-th first low- or high-band TFF 1002 in the first low- or high-band TFF group 102. For example, when u=1, the signal is input to port a of the first low- or high-band TFF 1002, or when u≠1, the signal is input to port c of the first low- or high-band TFF 1002. Port d of the u-th first low- or high-band TFF 1002 is connected to port a of the (u+1)-th first low- or high-band TFF 1002, and thus the last first low- or high-band TFF 1002, i.e., the multiple wavelength λ v , λ v+N , …, λ v+(M-1)*N The port d of the Mth first low-band or high-band TFF 1002, which corresponds to the TFF from which the last wavelength was obtained, splits the multiple wavelengths λ1 to λ M*N , v∈{1,2,…,N}. N is within the passband range of the first low-pass or high-pass TFF 1002. 1+N From λ N+N is within the stopband range of the u-th first low-pass or high-pass TFF 1002. N*u is within the passband range of the u-th first low-pass or high-pass TFF 1002. 1+N*u From λ N+N*u is within the stopband range of the u-th first low-pass or high-pass TFF 1002. By analogy, λ1 to λ N*(M-1)is within the passband range of the Mth first low-pass or high-pass TFF 1002, and λ 1+N*(M-1) From λ N+N*(M-1) is within the stopband range of the Mth first low-pass or high-pass TFF 1002, and therefore the port d of the Mth first low-pass or high-pass TFF 1002 is within the stopband range of the Mth first low-pass or high-pass TFF 1002 from wavelength λ1 to λ N*M The signal output has the following characteristics:

[0150] Optionally, when the WDM component includes a second low-band or high-band TFF group 102′, the port d of the Mth band-stop TFF 1001 of each of the N-channel band-stop TFF groups 101 in the WDM component receives a multi-wavelength signal, e.g., a wavelength λ v , λ v+N , …, λ v+(M-1)*N , where v∈{1,2,...,N}, M and N are integers equal to or greater than 1, and each port c of the band-stop TFF in the N-channel band-stop TFF group is further configured to output a signal having a corresponding wavelength. In other words, each of the band-stop TFFs in the N-channel band-stop TFF group is further multiplexed to perform a multiplexing / demultiplexing process in the opposite direction to the above, and thus the band-stop TFFs in the first row of the uth column are ... v From λ v+(N-1) to the second low- or high-band TFF group 102', for example to port d or port b of the u-th second low- or high-band TFF 1002' in the second low- or high-band TFF group 102'. For example, when u=M, the signal is input to port d of the second low- or high-band TFF 1002', or when u≠M, the signal is input to port b of the second low- or high-band TFF 1002'. Port a of the u-th second low- or high-band TFF 1002' is connected to port d of the u-1-th second low- or high-band TFF 1002', and thus port a of the first second low- or high-band TFF 1002', i.e., port a of the u-th second low- or high-band TFF 1002', i.e., port b of the u-th second low- or high-band TFF 1002', is connected to port d of the u-1-th second low- or high-band TFF 1002'. v , λ v+N , …, λ v+(M-1)*NThe first and second low- or high-band TFFs 1002' correspond to the TFFs from which the first wavelength was obtained through splitting a plurality of wavelengths λ1 to λ M*N , v∈{1, 2, …, N}.

[0151] By using the above WDM components based on TFF, the optical signal processing cost, link insertion loss, and link configuration complexity are reduced, thus reducing the manual configuration cost.

[0152] In the above embodiments shown in Figures 2 to 6, the WDM component is implemented based on a band-stop filter. An embodiment of the present application further provides a WDM component, which is implemented based on a band-stop filter.

[0153] As shown in FIG. 7, the WDM components are: At least two first input ports 203, at least one group of combiner splitter structures, and a first common port 204. may include.

[0154] At least one group of combiner splitter structures includes a first combiner splitter structure 201-1.

[0155] The first combiner splitter structure 201-1 includes two band filters 2001, i.e., a first band filter and a second band filter, and two low-pass or high-pass filter structures or two total reflection structures, such as a first total reflection structure 2002 and a second total reflection structure 2002.

[0156] A bandpass filter is configured to transmit wavelengths within a particular range and reflect wavelengths outside of this particular range.

[0157] Optionally, the positions of the two bandpass filters 2001 are diagonal and the positions of the two total reflection structures 2002 are diagonal.

[0158] The wavelengths λ1, λ2, λ4, and λ5 are used as examples. The first band filter 2001 in the two band filters 2001 is configured to transmit one of the wavelengths λ2 and λ5, e.g., λ2, and reflect the other as well as the incident wavelengths λ1 and λ4, which may come from the first incident port 203. The second band filter 2001 in the two band filters 2001 is configured to transmit another wavelength, e.g., λ5, different from the wavelengths transmitted by the first band filter 2001 in the wavelengths λ2 and λ5, and reflect the wavelengths transmitted by the first band filter 2001, e.g., λ2, as well as the wavelengths λ1 and λ4. The two total reflection structures 2002 are separately configured to reflect signals from the two band filters 2001, so that signals with wavelengths λ1, λ2, λ4, and λ5 can be obtained at the first common port 204.

[0159] Optionally, the wavelengths λ1, λ2, λ4, and λ5 are λ1, λ2, λ4, and λ5 in the CWDM described above.

[0160] A more general description of this solution is provided as follows.

[0161] The at least two first input ports include a first input port I 1,1 and the first input port I 1,2 The first input port I 1,1 There are two wavelengths, E 1,1 and E 1,2 The first input port I is configured to receive a first input signal M1 of a first channel having a wavelength of 1,2 There are two wavelengths, F 1,1 and F 1,2 The second channel is configured to receive a first input signal N1 having a wavelength of 100 .mu.m.

[0162] The two band-pass filters include a first band-pass filter 2001 and a second band-pass filter 2001 .

[0163] The two total reflection structures include a first total reflection structure 2002 and a second total reflection structure 2002 .

[0164] The first bandpass filter 2001 has a first input port I 1,1 The first channel input signal M1 having two wavelengths is input from 1,2 transmits wavelength E 1,1 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0165] The first bandpass filter 2001 has a first input port I 1,2 The F-th input signal in the second channel N1 having two wavelengths is input from 1,1 and F 1,2 The optical fiber is further configured to reflect wavelengths of .

[0166] The first total reflection structure 2002 receives the E 1,1 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0167] The second total reflection structure 2002 is a structure for receiving the E 1,2 The wavelength of F 1,1 wavelength, and F 1,2 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0168] The second bandpass filter 2001 is a filter that receives the E 1,1 transmits wavelength E 1,2 The wavelength of F 1,1 wavelength, and F 1,2 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0169] The first common port 204 is configured to output a single-channel multi-wavelength signal Q1, the wavelengths of which are the E 1,1 Wavelength of E 1,2 The wavelength of F 1,1 wavelength, and F 1,2 Includes wavelengths of.

[0170] In the more general solution above,1,1 and E 1,2 The wavelengths of F correspond to the wavelengths λ2 and λ5 in FIG. 1,1 and F 1,2 may be understood to correspond to the wavelengths λ1 and λ4, respectively, of Figure 7. The first bandpass filter corresponds to the bandpass filter in the upper left corner of Figure 7, and the second bandpass filter corresponds to the bandpass filter in the lower right corner of Figure 7.

[0171] By using the WDM components provided in the above embodiment, the synthesis of two channels of dual wavelength signals can be implemented, that is, a signal of one channel having four wavelengths is obtained. In this way, the optical signal processing cost, the link insertion loss, and the link configuration complexity are reduced. Therefore, the manual configuration cost is reduced.

[0172] Furthermore, based on the WDM components shown in FIG. 7, in the embodiment of the present application, the components may be further extended to combine three channel dual-wavelength signals into one channel six-wavelength signal.

[0173] As shown in FIG. 8, based on the WDM component shown in FIG. 7, the WDM component may further include a second combiner splitter structure 201-2.

[0174] Based on the more general description of FIG. 7, in the WDM component, The second combiner splitter structure 201-2 may include two bandpass filters and two total reflection structures.

[0175] The two bandpass filters included in the second combiner splitter structure include a third bandpass filter and a fourth bandpass filter.

[0176] The two total reflection structures included in the second combiner splitter structure include a third total reflection structure and a fourth total reflection structure.

[0177] The third bandpass filter is connected to the first input port I 1,3 The third channel input signal C1 having two wavelengths is input from 1,1 Reflects wavelengths of G 1,2 configured to transmit wavelengths of G 1,2 The wavelength of is located within the passband range of the third bandpass filter.

[0178] The third bandpass filter is the Eth bandpass filter from the second bandpass filter. 1,1 Wavelength of E 1,2 The wavelength of F 1,1 wavelength, and F 1,2 The optical fiber is further configured to reflect wavelengths of .

[0179] The third total reflection structure is the third bandpass filter G 1,2 Wavelength of E 1,1 Wavelength of E 1,2 The wavelength of F 1,1 wavelength, and F 1,2 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0180] The fourth total reflection structure is the G 1,1 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0181] The fourth bandpass filter is the G th bandpass filter from the fourth total reflection structure. 1,1 and transmits the wavelength of G from the third total reflection structure. 1,2 Wavelength of E 1,2 Wavelength of E 1,1 The wavelength of F 1,1 wavelength, and F 1,2 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0182] The single-channel multi-wavelength signal Q1 output by the first common port is 1,1 and G 1,2 The wavelengths of the .lambda.

[0183] In the above description, the Gth wavelength in the third channel input signal C1 having two wavelengths is 1,1and G 1,2 may be understood to correspond to wavelengths λ3 and λ6, respectively, in FIG. 8. The first band filter in the first combiner splitter structure 201-1 in FIG. 8 is the band filter in the upper left corner, transmits wavelength λ5 and reflects wavelengths λ1, λ2, and λ4. The second band filter in the first combiner splitter structure 201-1 is the band filter in the lower right corner, transmits wavelength λ2 and reflects wavelengths λ1, λ4, and λ5. The third band filter in the second combiner splitter structure 201-2 is the band filter in the upper left corner, transmits wavelength λ6 and reflects wavelengths λ1, λ2, λ4, λ5, and λ3. The fourth band filter in the second combiner splitter structure 201-2 is the band filter in the lower right corner, transmits wavelength λ3 and reflects wavelengths λ1, λ2, λ4, λ5, and λ6. In this way, signals having wavelengths λ1 to λ6 are obtained. In this way, the first common port 204 may output signals having wavelengths λ1 to λ6 that are obtained by the fourth bandpass filter. It may be understood that FIG. 8 is a specific example. There may be other settings for a specific passband range of the bandpass filter, for example, settings based on the wavelengths that need to be processed. This is not limited in this specification.

[0184] By using the WDM components provided in the above embodiment, the synthesis of three-channel dual-wavelength signals can be implemented, that is, one channel signal with six wavelengths is obtained. The optical signal processing cost is further reduced.

[0185] Furthermore, based on the WDM component shown in FIG. 7, the embodiment of the present application further provides a double density WDM component.

[0186] As shown in FIG. 9, the WDM component is based on the WDM component shown in FIG. 7, and at least one group of combiner splitter structures further includes a third combiner splitter structure 201-3, at least two second input ports 203', and a second common port 204'.

[0187] The third combiner splitter structure 201-3 includes two band filters, e.g., a fifth band filter and a sixth band filter, and further includes two low-pass or high-pass filters or two total reflection structures, e.g., a fifth total reflection structure and a sixth total reflection structure.

[0188] The second band filter 2001 of the first combiner splitter structure 201-1 is further configured to receive signals having wavelengths λ2 and λ5 from the second input port 203', and the wavelengths λ1 and λ4 input by the first band filter 2001 of the first combiner splitter structure 201 are from the sixth band filter 2001 of the second combiner splitter structure 201.

[0189] The sixth band filter 2001 of the third combiner splitter structure 201-3 is further configured to input signals having wavelengths λ1 and λ4 from the second input port 203', and the fifth band filter 2001 is further configured to input signals having wavelengths λ1 and λ4 from the first input port 203. The fifth band filter 2001 and the sixth band filter 2001 are respectively configured to transmit one and the other of the wavelengths λ1 and λ4. For example, the fifth band filter 2001 transmits the wavelength λ1, and the sixth band filter 2001 transmits the wavelength λ4, or vice versa. The two total reflection structures in the second combiner splitter structure 201 are configured to reflect all input signals. In this way, the fifth band filter in the second combiner splitter structure is further configured to output signals having wavelengths λ1, λ2, λ4, and λ5 to the second common port 204'.

[0190] Likewise, the present application further provides a more general description, which is in particular as follows.

[0191] Based on the more general description of FIG. 7, as shown in FIG. 9, at least one group of combiner splitter structures in a WDM component may further include a third combiner splitter structure.

[0192] The third combiner splitter structure includes two bandpass filters and two total reflection structures.

[0193] The two band filters included in the third combiner splitter structure include a fifth band filter and a sixth band filter.

[0194] The two total reflection structures included in the third combiner splitter structure include a fifth total reflection structure and a sixth total reflection structure.

[0195] The fifth bandpass filter is connected to the first input port I 1,2 The F 1,2 transmit wavelength F 1,1 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0196] The fifth total reflection structure is a structure for receiving the F 1,2 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0197] The sixth total reflection structure is a structure for receiving the F 1,1 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0198] The sixth bandpass filter is the F 1,1 and transmits the wavelength of F from the fifth total reflection structure. 1,2 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0199] The first bandpass filter is a filter that is connected to the sixth bandpass filter through the F 1,1 and F 1,2 The optical fiber is configured to receive a signal having a wavelength of

[0200] Second input port I 2,1 There are two wavelengths, E2,1 and E 2,2 The second input port I is configured to receive a second input signal M2 of the first channel having a wavelength of 2,2 There are two wavelengths, F 2,1 and F 2,2 The second input signal N2 of the second channel having a wavelength of

[0201] The second bandpass filter is connected to the second input port I 2,1 The Eth incident 2,1 transmits wavelength E 2,2 The optical fiber is further configured to reflect wavelengths of .

[0202] The second total reflection structure receives the E 2,1 The optical fiber is further configured to reflect wavelengths of .

[0203] The first total reflection structure receives the E 2,2 The optical fiber is further configured to reflect wavelengths of .

[0204] The first bandpass filter is the E 2,2 and transmits the E wavelength from the second bandpass filter. 2,1 The optical fiber is further configured to reflect wavelengths of .

[0205] At least one group of combiner splitter structures further includes a third combiner splitter structure.

[0206] The third combiner splitter structure includes two bandpass filters and two total reflection structures.

[0207] The two band filters included in the third combiner splitter structure include a fifth band filter and a sixth band filter.

[0208] The two total reflection structures included in the third combiner splitter structure include a fifth total reflection structure and a sixth total reflection structure.

[0209] The sixth bandpass filter is connected to the second input port I 2,2 The F 2,1 The first bandpass filter transmits the wavelength of 2,2 and E 2,1 and F 2,2 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0210] The sixth total reflection structure is a structure for receiving the F 2,2 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0211] The fifth total reflection structure is the sixth bandpass filter, F 2,1 Wavelength of E 2,2 and E 2,1 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0212] The fifth bandpass filter is the F 2,2 The fifth total reflection structure transmits the wavelength F 2,1 Wavelength of E 2,2 and E 2,1 The optical fiber is configured to reflect wavelengths of 100 nm to 150 nm.

[0213] The second common port is configured to output a single-channel multi-wavelength signal Q2, the wavelengths of which are the E 2,1 Wavelength of E 2,2 The wavelength of F 2,1 wavelength, and F 2,2 Includes wavelengths of.

[0214] In the more general solution above, 1,1 and E 1,2 The wavelengths of F correspond to the wavelengths λ2 and λ5 in FIG. 1,1 and F 1,2may be understood to correspond to wavelengths λ1 and λ4, respectively, in Figure 9. The first band filter corresponds to the band filter in the upper left corner of the first combiner splitter structure 201-1 in Figure 9, the second band filter corresponds to the band filter in the lower right corner of the first combiner splitter structure 201-1 in Figure 9. The fifth band filter corresponds to the band filter in the upper left corner of the third combiner splitter structure 201-3 in Figure 9, and the sixth band filter corresponds to the band filter in the lower right corner of the third combiner splitter structure 201-3 in Figure 9.

[0215] By using the WDM components provided in the above embodiment, the synthesis of two-channel dual-wavelength signals can be implemented, i.e., a signal of one channel with four wavelengths is obtained. In addition, the synthesis of two-channel double-density dual-wavelength signals can also be implemented, i.e., a signal of two channels with four wavelengths is obtained. This further reduces the optical signal processing cost.

[0216] It may be understood that based on the WDM components shown in any one of Figures 7 to 9, more combiner splitter structures and corresponding input ports may be further included to support the combination of more channel dual-wavelength signals and the combination of more channel double-density dual-wavelength signals. The specific solutions will not be described again in this specification.

[0217] The above WDM components based on bandpass filters may also be implemented based on TFFs.

[0218] FIG. 10 is a diagram of the structure of a TFF configured to implement a bandpass filtering function.

[0219] This structure is similar to the solution shown in Fig. 5. The difference is that the band-stop filter disposed in the TFF is replaced with a band-pass filter 2001. In this case, for example, port a is still configured to input wavelengths λ1 to λ6, and the pass-band range of the band-pass filter includes the wavelength λ1 but not other wavelengths. Based on the characteristics of the band-pass filter, port b of the TFF is configured to output wavelengths λ2 to λ6, and port d is configured to output wavelength λ1. If port c of the TFF is configured to input wavelengths λ1 to λ6, then port d is configured to output wavelengths λ2 to λ6, and port b is configured to output wavelength λ1.

[0220] Based on the TFF of FIG. 10, an embodiment of the present application may provide a TFF-based WDM component.

[0221] FIG. 11 is a diagram of the structure of a WDM component based on band TFF.

[0222] The WDM components may implement the functions of the WDM components shown in FIG.

[0223] The WDM component may not only combine two-channel dual-wavelength signals into one-channel four-wavelength signal, but also combine two-channel double-density dual-wavelength signals, i.e., obtain two-channel four-wavelength signals.

[0224] It can be understood that the WDM component includes four band TFFs, and every two band TFFs form a combiner splitter structure shown in Figure 7 or Figure 9. For example, the two lower band TFFs in the four band TFFs in Figure 11 may form the first combiner splitter structure 201-1 shown in Figure 7 or Figure 9, and the two upper band TFFs may form the third combiner splitter structure 201-3 shown in Figure 9. The third combiner splitter structure 201-3 is optional.

[0225] The upper band TFF in the first combiner splitter structure 201-1, i.e., the first band TFF (corresponding to the first band filter), transmits the wavelength λ2 among the wavelengths λ2 and λ5 input through the port a to the port d, reflects the wavelengths λ1 and λ4 input through the port c to the port d, and reflects the wavelength λ5 among the wavelengths λ2 and λ5 input through the port a to the port b. The port b is connected to the port a of the lower band TFF, i.e., the second band TFF (corresponding to the second band filter). The port d is connected to the port c of the second band TFF. The second band TFF transmits the wavelength λ5 to the port d, and reflects the wavelengths λ1, λ2, and λ4 input through the port c to the port d to obtain a signal having wavelengths λ1, λ2, λ4, and λ5 output by the port d. The first common port 204 outputs signals having wavelengths λ1, λ2, λ4, and λ5 from port d of the second band TFF.

[0226] Optionally, the upper band TFF in the third combiner splitter structure 201-3, i.e., the fifth band TFF (corresponding to the fifth band filter), transmits to port b the wavelength λ1 among the wavelengths λ1 and λ4 input through port c, and reflects to port d the wavelength λ4 among the wavelengths λ1 and λ4 input through port c. The port b is connected to port a of the lower band TFF, i.e., the sixth band TFF (corresponding to the sixth band filter). The port d is connected to port c of the sixth band TFF. The sixth band TFF transmits to port b the wavelength λ4 and reflects to port b the wavelength λ1 input through port a to obtain a signal having wavelengths λ1 and λ4 output by port b. The port b of the sixth band TFF is connected to port c of the first band TFF, and the signal having wavelengths λ1 and λ4 is input to the first band TFF.

[0227] Optionally, port b of the second band TFF is further configured to input signals having wavelengths λ1 and λ4, and port d of the sixth band TFF is further configured to input signals having wavelengths λ1 and λ4, such that port a of the fifth band TFF may further output signals having wavelengths λ1, λ2, λ4, and λ5 to obtain a signal having four wavelengths of the second channel.

[0228] It may be understood that the connection of the above band TFFs may be changed due to the structural symmetry of the TFFs. For example, the connection of the TFFs shown in FIG. 11 may be changed to the connection shown in FIG. 12. Specifically, the port b of the sixth band TFF may be connected with the port a of the first band TFF. The port c of the first band TFF is configured to input signals having wavelengths λ2 and λ5, and the port b of the second band TFF is configured to output signals having wavelengths λ1, λ2, λ4, and λ5. Optionally, when the WDM is a double-density WDM, the port d of the second band TFF is further configured to input signals having wavelengths λ2 and λ5.

[0229] Optionally, a WDM component may be further provided for combining three-channel dual-wavelength signals into one-channel six-wavelength signal, similar to the structure shown in Fig. 11. Furthermore, a double-density WDM component may be further provided for combining three-channel double-density dual-wavelength signals, i.e., for obtaining two-channel six-wavelength signals.

[0230] Optionally, Figure 13 is a diagram of the structure. For specific description, please refer to Figure 11. That is, a combiner splitter structure is added, which includes the two lowest band TFFs in Figure 13, and is configured to input signals having wavelengths λ3 and λ6, and combine the wavelengths λ3 and λ6 with the wavelengths λ1, λ2, λ4, and λ5 input to the combiner splitter structure to obtain signals having wavelengths λ1 to λ6.

[0231] The embodiment of the present application further provides a WDM component based on a band-stop filter. The structure of the WDM component is shown in FIG. 7. That is, in the structure shown in FIG. 7, the band-stop filter may be configured to combine two channels of dual-wavelength signals. In the first combiner splitter structure, the filter at the upper left corner is the first band-stop filter, and the filter at the lower right corner is the second band-stop filter. The first band-stop filter and the second band-stop filter reflect one and the other of the wavelengths λ2 and λ5, respectively. For example, the first band-stop filter reflects the wavelength λ2, and the second band-stop filter reflects the wavelength λ5. Both the first band-stop filter and the second band-stop filter transmit the wavelengths λ1 and λ4. In this way, the second band-stop filter may be configured to output signals having wavelengths λ1, λ2, λ4, and λ5.

[0232] Correspondingly, the structures shown in Figures 8 and 9 can also be applied to band-stop filters, in which case only the corresponding wavelengths in the passband range need to be changed to wavelengths in the stopband range, and the wavelengths in the stopband range need to be changed to wavelengths in the passband range.

[0233] Correspondingly, a WDM component based on a band-stop filter may also be implemented based on a band-stop TFF, ie the TFF shown in FIG.

[0234] 14 is a diagram of the structure of a double-density WDM component based on a band-stop TFF. The second input port 203' is optional, and the second common port 204 is also optional.

[0235] Based on the structure of the band-stop TFF, it may be understood that the double-density WDM component based on the band-stop TFF in FIG. 14 can be further modified into another structure, as long as the function of the above-mentioned WDM component based on the band-stop filter is implemented, which is not limited in this specification.

[0236] It may be understood that the above Z-block structure or TFF structure are examples, and the WDM components provided in the embodiments of the present application may alternatively be implemented in other manners, such as an arrayed waveguide grating (AWG), an interleaver (ITL) filter, or a reconfigurable optical add / drop multiplexer (ROADM), which is not limited herein.

[0237] Optionally, the total reflection structure in the embodiments of the present application may be implemented by using optical fibers.

[0238] Based on the above structure, the embodiment of the present application further provides a WDM component manufacturing method.

[0239] The manufacturing method includes obtaining a filter, a Z-block, or a corresponding WDM component based on a TFF as described in the above embodiments.

[0240] For specific description of the TFF in the TFF, such as one or more of the specific description, function, connection, or setting of the components in the Z block, or the description of the filter, please refer to the description in any one of the above embodiments. Details will not be described again in this specification.

[0241] Furthermore, based on the WDM components provided in the above embodiments, the embodiments of the present application may further provide a transmitting end and / or a receiving end.

[0242] The sending end combines the light waves by using the WDM components provided in the above embodiments, and the receiving end splits the light waves by using the WDM components provided in the above embodiments.

[0243] The transmitting end may be an access network device, a core network device, or a split device in an access network device, for example, a BBU or an RRU, a CU node or a DU node, or a split device in a core network device, which is not limited in this specification.

[0244] The receiving end may be an access network device, a core network device, or a split device in an access network device, such as a BBU or an RRU, a CU node or a DU node, or a split device in a core network device, which is not limited in this specification.

[0245] An embodiment of the present application further provides a communication system, including the transmitting end and / or the receiving end in the above embodiment.

[0246] The embodiments of the present application may be used alone or in combination, which is not limited herein.

[0247] Additionally, aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and / or engineering techniques. The term "article of manufacture" as used herein encompasses a computer program accessible from any computer-readable component, carrier, or medium. For example, computer-readable media may include, but are not limited to, magnetic storage components (e.g., hard disk drives, floppy disks, or magnetic tapes), optical disks (e.g., compact discs (CDs) or digital versatile discs (DVDs)), smart cards, and flash memory components (e.g., erasable programmable read-only memory (EPROM), cards, sticks, or key drives). Additionally, various storage media described herein may represent one or more devices and / or other machine-readable media configured to store information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0248] In the above embodiments, it should be understood that terms such as "first" and "second" are merely intended to distinguish different objects and do not constitute any limitation on the present application.

[0249] It should be further understood that the term "and / or" describes an association relationship between related objects and represents that three relationships may exist. For example, A and / or B may represent three cases: only A exists, both A and B exist, and only B exists. The character " / " usually indicates an "or" relationship between related objects. "At least one" means one or more. "At least one of A and B" is similar to "A and / or B" and is used to describe an association relationship between related objects and represents that three relationships may exist. For example, at least one of A and B may represent three cases: only A exists, both A and B exist, and only B exists.

[0250] Those skilled in the art may realize that the units and algorithm steps described with respect to the examples in the embodiments disclosed herein may be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether a function is implemented by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but the implementation should not be considered to go beyond the scope of this application.

[0251] For the sake of convenience and simplicity, those skilled in the art can clearly understand that for the detailed operation processes of the above systems, devices and units, please refer to the corresponding processes in the above method embodiments, and the details will not be described again in this specification.

[0252] In some embodiments provided in the present application, it should be understood that the disclosed system, device, and method may be implemented in other manners. For example, the described device embodiment is only an example. For example, the division of units is only a logical functional division, and may be other divisions in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not implemented. In addition, the shown or described mutual couplings or direct couplings or communication connections may be implemented by using some interfaces. Indirect couplings or communication connections between devices or units may be implemented in electronic, mechanical, or other forms.

[0253] The units described as separate parts may or may not be physically separate, and the parts shown as units may or may not be physical units, may be located in one location or distributed over multiple network units. Some or all of the units may be selected based on actual requirements to achieve the objectives of the solutions of the embodiments.

[0254] In addition, the functional units in the embodiments of the present application may be integrated into one processing unit, or each of the units may exist physically alone, or two or more units may be integrated into one unit.

[0255] When a function is implemented in the form of a software functional unit and sold or used as an independent product, the function may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application essentially, or a part that contributes to the prior art, or a part of the technical solution may be implemented in the form of a software product. The computer software product is stored in a storage medium and includes some instructions for instructing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application. The above storage medium includes any medium that can store program code, for example, a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0256] The above description is only a specific implementation of the present application, and the protection scope of the present application is not limited thereto. Any variations or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed in this application shall fall within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A wavelength division multiplexing (WDM) component, comprising: at least two first input ports, at least two bandstop filter groups, a first low-pass or high-pass filter group, and a first common port; The at least two first input ports include a first input port I １，１ and the first input port I １，２ and the first input port I １，１ is a first input signal M of a first channel having X1 wavelengths. １ and the first input port I １，２ is the first input signal N of the second channel having Y wavelengths. １ configured to input the at least two bandstop filter groups include a first bandstop filter group and a second bandstop filter group; The X1 first bandstop filters in the first bandstop filter group are configured to filter the incident input signal M of the first channel having the X1 wavelengths. １ , signal M １，１ Signal M １，Ｘ１ The X1 wavelengths are configured to split the signal into single wavelength signals of X1 channels, １，１ From the wavelength of E １，Ｘ１ and said signal M １，１ from the signal M １，Ｘ１ The single wavelength signal of the X1 channels is １，１ From the wavelength of E １，Ｘ１ and the wavelength of E １，１ From the wavelength of E １，Ｘ１ The wavelengths of the X1 first band-stop filters are each within the stopband range of the X1 first band-stop filters, and the i1th first band-stop filter among the X1 first band-stop filters is the E １，ｉ１ A signal M having a wavelength of １，ｉ１ and configured to transmit a signal input to the i1 first bandstop filter, where X1 is an integer greater than 1 and i1 is an integer ranging from 1 to X1, and the first other wavelength is a wavelength that is equal to or smaller than the E １，１ From the wavelength of E １，Ｘ１ It belongs to the wavelength of The Y1 second bandstop filters in the second bandstop filter group are configured to filter the Y1 wavelengths of the incident input signal N １ , signal N １，１ From signal N １，Ｙ１ The Y1 wavelengths are configured to split the F1 channel single wavelength signal into F1 channel single wavelength signals, １，１ From the wavelength of F １，Ｙ１ and said signal N １，１ to the signal N １，Ｙ１ The single-wavelength signals of the Y channels are １，１ from the wavelength of F １，Ｙ１ and the wavelength of F １，１ from the wavelength of F １，Ｙ１ The wavelengths of the jth second bandstop filter among the Y1 second bandstop filters are within the stopband range of the corresponding second bandstop filter, and the jth second bandstop filter among the Y1 second bandstop filters is the F １，ｊ１ A signal having a wavelength of N １，ｊ１ and transmits a signal input to the j1 second bandstop filter, Y1 being an integer greater than or equal to 1, j1 being an integer ranging from 1 to Y1, and the second different wavelength being the F １，１ from the wavelength of F １，Ｙ１ It belongs to the wavelength of The W1 second band-stop filters in the second band-stop filter group are １，１ from the signal M １，Ｘ１ The single-wavelength signals of the X1 channels are respectively １，１ to the signal N １，Ｙ１ The Y1-channel single-wavelength signal is combined with the Y1-channel multi-wavelength signal T １，ｔ１＝１…Ｗ１ and W1 is a larger value of X1 and Y1, and when X1 is larger than Y1, the W1 second bandstop filters comprise the Y1 second bandstop filters, or when X1 is smaller than Y1, the W1 second bandstop filters are part of the Y1 second bandstop filters, or when X1 is equal to Y1, the W1 second bandstop filters are the Y1 second bandstop filters, and the j1 second bandstop filter among the Y1 second bandstop filters is a j1 second bandstop filter that is a j1 second bandstop filter input to the j1 second bandstop filter. １，ｉ１ to transmit the multi-wavelength signal T １，ｔ１ and further configured to obtain the multi-wavelength signal T １，ｔ１ is the above E １，ｉ１ and the wavelength of F １，ｊ１ where t1 is an integer ranging from 1 to W1, The first low-pass or high-pass filter group includes Z1 first low-pass or high-pass filters, and a multi-wavelength signal P １，ｋ１＝１…Ｚ１ are combined to produce a single-channel multi-wavelength output signal Q １ and the multi-wavelength signal P １，ｋ１＝１…Ｚ１ A multi-wavelength signal P １，ｔ１＝１…Ｗ１ The multi-wavelength signal P １，ｔ１ is the multi-wavelength signal T １，ｔ１＝１…Ｗ１ The multi-wavelength signal T １，ｔ１ The Z1 first low-pass or high-pass filters include W1 first low-pass or high-pass filters, and the multi-wavelength signal P １，ｔ１＝１…Ｗ１ are within the stopband range of the corresponding first low-pass or high-pass filter among the W1 first low-pass or high-pass filters, and the t1-th first low-pass or high-pass filter among the W1 first low-pass or high-pass filters is １，ｔ１ and transmits a signal input to the t1 first low-pass or high-pass filter, which is another wavelength, k1 being an integer ranging from 1 to Z1, Z1 being an integer equal to or greater than W1; The first common port receives the single-channel multi-wavelength output signal Q obtained by the first low-pass or high-pass filter group. １ configured to output Wavelength division multiplexing WDM component.

2. 2. The WDM element of claim 1, wherein X1=Y1.

3. 3. The WDM element of claim 2, wherein X1=Y1=2, W1=2, and Z1=2.

4. The at least two first input ports include a first input port I １，３ and the first input port I １，３ is the first input signal C of the third channel having two wavelengths １ configured to input The at least two bandstop filter groups further include a third bandstop filter group, and two third bandstop filters in the third bandstop filter group are configured to receive the incident input signal C of the third channel having the two wavelengths. １ , signal C １，１ and signal C １，２ The two wavelengths are configured to split the two channels into a single wavelength signal of G １，１ and the wavelength of G １，２ and said signal C １，１ and said signal C １，２ The single wavelength signals of the two channels are １，１ and the wavelength of G １，２ and the wavelength of G １，１ and the wavelength of G １，２ The wavelengths of G are respectively within the stopband ranges of the corresponding third bandstop filters in the two third bandstop filters, and the first third bandstop filter in the two third bandstop filters has a stopband range of G １，１ The signal C having a wavelength of １，１ Reflecting the G １，２ and the signal C input to the first and third band-stop filters １，２ and the second and third band-stop filters are configured to transmit the G １，２ The signal C having a wavelength of １，２ The reflector is configured to reflect the The two third band-stop filter groups are connected to the signal T １，１ and signal T １，２ The two channel multi-wavelength signals are respectively referred to as the signal C １，１ and said signal C １，２ The two-channel multi-wavelength signal R １，１ and R １，２ Each of the two third band-stop filters is further configured to obtain the signal T １，１ Or T １，２ to transmit the multi-wavelength signal R １，１ Or R １，２ and further configured to obtain the multi-wavelength signal R １，１ is the above E １，１ The wavelength of F １，１ and the wavelength of G １，１ and the multi-wavelength signal R １，２ is the above E １，２ The wavelength of F １，２ and the wavelength of G １，２ and Two channel multi-wavelength signal P １，１ and P １，２ Multi-wavelength signal P １，１ is the multi-wavelength signal R １，１ and the multi-wavelength signal P １，２ is the multi-wavelength signal R １，２ and the multi-wavelength signal P １，１ and P １，２ are within the stopband range of a corresponding first low-pass or high-pass filter of the two first low-pass or high-pass filters, respectively, and the first first low-pass or high-pass filter of the two first low-pass or high-pass filters is a first channel of the multi-wavelength signal P １，１ a second first low-pass or high-pass filter among the two first low-pass or high-pass filters configured to reflect the multi-wavelength signal P of the second channel; １，２ and the multi-wavelength signal P input to the second or first low-pass or high-pass filter. １，１ to transmit the multi-wavelength signal P １，１ and the multi-wavelength signal P １，２ the single-channel multi-wavelength output signal Q １ and the single-channel multi-wavelength output signal Q １ is the above E １，１ The wavelength of F １，１ The wavelength of G １，１ The wavelength of E １，２ The wavelength of F １，２ and the wavelength of G １，２ has a wavelength of A WDM element according to any one of claims 1 to 3.

5. The above E １，１ The wavelength of F １，１ The wavelength of G １，１ The wavelength of E １，２ The wavelength of F １，２ and the wavelength of G １，２ 5. The WDM element according to claim 4, wherein the wavelengths are six wavelengths used for sparse wavelength division multiplexing CWDM.

6. further comprising at least two second input ports, a second low-pass or high-pass filter group, and a second common port; The at least two second input ports include a second input port I ２，１ and a second input port I ２，２ and the second input port I ２，１ is the second input signal M of the first channel having X2 wavelengths. ２ and the second input port I ２，２ is a second input signal N of a second channel having Y wavelengths. ２ configured to input The X2 first bandstop filters among the X1 first bandstop filters in the first bandstop filter group are configured to receive the incident input signal M of the first channel having X3 wavelengths. ２ The X2 wavelengths of the signal M ２，１ Signal M ２，Ｘ２ The X2 wavelengths are further configured to split the X2 channels into single wavelength signals, ２，１ From the wavelength of E ２，Ｘ２ and said signal M ２，１ from the signal M ２，Ｘ２ The single wavelength signals of the X2 channels are ２，１ From the wavelength of E ２，Ｘ２ and the wavelength of E ２，１ From the wavelength of E ２，Ｘ２ The wavelengths of the i-th first band-stop filter among the X1 first band-stop filters are within the stopband ranges of the X2 first band-stop filters, respectively. ２，ｉ１ A signal M having a wavelength of ２，ｉ１ and a third different wavelength, X2 being an integer greater than or equal to 1 and less than or equal to X1, and the third different wavelength being equal to or less than the E ２，１ From the wavelength of E ２，Ｘ２ X3 is an integer equal to or greater than X2, The Y2 second bandstop filters among the Y1 second bandstop filters of the second bandstop filter group are configured to receive the Y3 wavelengths of the incident input signal N of the second channel. ２ The Y wavelengths in the signal N ２，１ From signal N ２，Ｙ２ The F-th wavelength is further configured to split the F-th wavelength signal into Y2 channel single wavelength signals, ２，１ From the wavelength of F ２，Ｙ２ and said signal N ２，１ to the signal N ２，Ｙ２ The single-wavelength signals of the Y2 channels are ２，１ from the wavelength of F ２，Ｙ２ and the wavelength of F ２，１ from the wavelength of F ２，Ｙ２ The wavelengths of the j1 second bandstop filters are within the stopband ranges of the corresponding second bandstop filters among the Y2 second bandstop filters, and the j1 second bandstop filter among the Y1 second bandstop filters is the F ２，ｊ１ A signal having a wavelength of N ２，ｊ１ and transmit a signal input to the j1 second bandstop filter at a fourth different wavelength, the fourth different wavelength being the F ２，１ from the wavelength of F ２，Ｙ２ Y2 is an integer greater than or equal to 1 and less than or equal to Y1, and Y3 is an integer greater than or equal to Y2; The W2 first bandstop filters in the first bandstop filter group are ２，１ From signal N ２，Ｘ２ The Y2 channel single wavelength signals are respectively ２，１ Signal M ２，Ｙ１ This is combined with the single-wavelength signal of X2 channels to obtain a multi-wavelength signal T ２，ｔ２＝１…Ｗ２ and W2 is a larger value of X2 and Y2, and when X2 is larger than Y2, the W2 first bandstop filters comprise the X2 first bandstop filters, or when X2 is smaller than Y2, the W2 first bandstop filters are a part of the X2 first bandstop filters, or when X2 is equal to Y2, the W2 first bandstop filters are the X2 first bandstop filters, and the i1 first bandstop filter among the X1 first bandstop filters is a filter for the signal N input to the i1 first bandstop filter. ２，ｊ１ to transmit the multi-wavelength signal T ２，ｔ２ and further configured to obtain the multi-wavelength signal T ２，ｔ２ is the above E ２，ｉ１ and the wavelength of F ２，ｊ１ t2 is an integer ranging from 1 to W2, The second low-pass or high-pass filter group includes Z2 first low-pass or high-pass filters, and a multi-wavelength signal P ２，ｋ２＝１…Ｚ２ are combined to produce a single-channel multi-wavelength output signal Q ２ and the multi-wavelength signal P ２，ｋ２＝１…Ｚ２ A multi-wavelength signal P ２，ｔ２＝１…Ｗ２ The multi-wavelength signal P ２，ｔ２ is the multi-wavelength signal T of the W2 channels. ２，ｔ２＝１…Ｗ２ The multi-wavelength signal T ２，ｔ２ The Z2 first low-pass or high-pass filters include W2 first low-pass or high-pass filters, and the multi-wavelength signal P ２，ｔ１＝１…Ｗ２ are within the stopband range of the corresponding first low-pass or high-pass filter among the W2 first low-pass or high-pass filters, and the t2th first low-pass or high-pass filter among the W2 first low-pass or high-pass filters is ２，ｔ２ and transmits a signal input to the t2 first low-pass or high-pass filter, which is another wavelength, k2 being an integer ranging from 1 to Z2, Z2 being an integer equal to or greater than W2; The second common port receives the single-channel multi-wavelength output signal Q obtained by the second low-pass or high-pass filter group. ２ Configured to output A WDM element according to any one of the preceding claims.

7. 7. The WDM element of claim 6, wherein X2=Y2=Z2=2.

8. The above E ２，１ The wavelength of E １，１ and the wavelength of said E ２，２ The wavelength of E １，２ and the wavelength of F ２，１ The wavelength of F １，１ and the wavelength of F ２，２ The wavelength of F １，２ 8. The WDM element of claim 7, wherein the wavelength is equal to

9. 7. The WDM element of claim 6, wherein a first second low-pass or high-pass filter in said second low-pass or high-pass filter group is a total reflector.

10. The present invention further comprises a Z-block structure, a plurality of isosceles right triangular prism notches are separately disposed on two sides of the Z-block structure, right angle surfaces of the isosceles right triangular prisms are perpendicular to the notches, bevels of the isosceles right triangular prisms of the notches on the same side are disposed in parallel, the notches on the two sides are disposed in a peer-to-peer manner opposite to the parallel disposed bevels, the notches on a first side comprise a notch used for the first entrance port, and the notches on a second side comprise a notch used for the first common port, and a first triangular prism filter is provided for each of the piano tips of the notches used for the first entrance port and the notches used for the first entrance port.

10. The WDM component of claim 3, wherein a band-stop filter thin film is plated on the bevel of the first triangular prism filter, a second triangular prism filter is disposed in each of the notches used for the first common port and the piano edge of the notch used for the first common port, a first low-pass or high-pass filter thin film is plated on the bevel of the second triangular prism filter, the band-stop filter thin film is a band-stop filter included in the at least two band-stop filter groups, and the first low-pass or high-pass filter thin film is a low-pass or high-pass filter included in the first low-pass or high-pass filter group.

11. 11. The WDM component of claim 10, wherein the first low-pass or high-pass filter thin film plated on the bevel of the second triangular prism filter disposed in the piano edge of the notch used for the first common port is used for total internal reflection.

12. 12. The WDM component of claim 10 or 11, wherein the piano edge of the notch used for the first entrance port is further used for the second entrance port, and the notch on the first side further comprises a notch used for the second common port, a third triangular prism filter is disposed at each of the piano edges of the notch used for the second common port and the notch used for the second common port, and a second low-pass or high-pass filter thin film is plated on the bevel of the third triangular prism filter, and the second low-pass or high-pass filter thin film is a low-pass or high-pass filter included in the second low-pass or high-pass filter group.

13. 13. The WDM component of claim 12, wherein the second low-pass or high-pass filter thin film plated on the bevel of the third triangular prism filter disposed in the piano edge of the notch used for the second common port is used for total internal reflection.

14. 14. A WDM element according to any one of claims 1 to 13, wherein a first low-pass or high-pass filter in the first low-pass or high-pass filter group is a total reflector.

15. A wavelength division multiplexing (WDM) component, comprising: at least two first input ports, at least one group of combiner splitter structures, and a first common port; the at least one group of combiner splitter structures comprises a first combiner splitter structure; the first combiner splitter structure comprises two bandpass filters and two total reflection structures; The at least two first input ports include a first input port I １，１ and the first input port I １，２ and the first input port I １，１ is two wavelengths, E １，１ and the wavelength of E １，２ A first input signal M １ and the first input port I １，２ is two wavelengths, F １，１ and the wavelength of F １，２ A first input signal N １ configured to input the two bandpass filters include a first bandpass filter and a second bandpass filter; the two total reflection structures include a first total reflection structure and a second total reflection structure; The first bandpass filter is connected to the first input port I １，１ The input signal M of the first channel having the two wavelengths is input from １ The above E in １，２ and transmits the wavelength of E １，１ configured to reflect a wavelength of The first bandpass filter is connected to the first input port I １，２ The input signal N of the second channel having the two wavelengths is input from １ The above F １，１ and the wavelength of F １，２ and further configured to reflect a wavelength of The first total reflection structure transmits the E １，１ configured to reflect a wavelength of The second total reflection structure is the E １，２ The wavelength of F １，１ and the wavelength of F １，２ configured to reflect a wavelength of The second band-pass filter is configured to receive the E １，１ and transmits the wavelength of E １，２ The wavelength of F １，１ and the wavelength of F １，２ configured to reflect a wavelength of The first common port receives a single channel multi-wavelength signal Q １ and configured to output the multi-wavelength signal Q １ The wavelength of E １，１ The wavelength of E １，２ The wavelength of F １，１ and the wavelength of F １，２ Including wavelengths of Wavelength division multiplexing WDM component.

16. The at least two first input ports are configured to receive two wavelengths, G １，１ and the wavelength of G １，２ A first input signal C of the third channel having a wavelength of １ a first input port I configured to input １，３ Equipped with the at least one group of combiner splitter structures further comprising a second combiner splitter structure; the second combiner splitter structure comprises two bandpass filters and two total reflection structures; the two band filters included in the second combiner splitter structure include a third band filter and a fourth band filter; the two total reflection structures included in the second combiner splitter structure include a third total reflection structure and a fourth total reflection structure; The third bandpass filter is connected to the first input port I １，３ The input signal C of the third channel having two wavelengths １ The above G １，１ and reflects wavelengths of １，２ configured to transmit wavelengths of １，２ is within the passband range of the third bandpass filter; The third band filter is the E １，１ The wavelength of E １，２ The wavelength of F １，１ and the wavelength of F １，２ and further configured to reflect a wavelength of The third total reflection structure is the third bandpass filter. １，２ The wavelength of E １，１ The wavelength of E １，２ The wavelength of F １，１ and the wavelength of F １，２ configured to reflect a wavelength of The fourth total reflection structure is configured to receive the G １，１ configured to reflect a wavelength of The fourth band-pass filter is configured to receive the G １，１ and transmits the wavelength of the G １，２ The wavelength of E １，２ The wavelength of E １，１ The wavelength of F １，１ and the wavelength of F １，２ configured to reflect a wavelength of The single-channel multi-wavelength signal Q output by the first common port. １ is the above G １，１ and the wavelength of G １，２ Further including wavelengths of 16. The WDM component of claim 15.

17. the at least one group of combiner splitter structures further comprising a third combiner splitter structure; the third combiner splitter structure comprises two bandpass filters and two total reflection structures; the two band filters included in the third combiner splitter structure include a fifth band filter and a sixth band filter; the two total reflection structures included in the third combiner splitter structure include a fifth total reflection structure and a sixth total reflection structure; The fifth bandpass filter is connected to the first input port I １，２ The F １，２ and transmits the wavelength of F １，１ configured to reflect a wavelength of The fifth total reflection structure is configured to receive the F １，２ configured to reflect a wavelength of The sixth total reflection structure receives the F １，１ configured to reflect a wavelength of The sixth band-pass filter is configured to receive the F １，１ and transmits the wavelength of F from the fifth total reflection structure. １，２ configured to reflect a wavelength of The first band filter is a filter that includes the sixth band filter to the F １，１ and the wavelength of F １，２ configured to receive a signal having a wavelength of 16. The WDM component of claim 15.

18. At least two second input ports I ２，１ and I ２，２ and a second common port, The second input port I ２，１ is two wavelengths, E ２，１ and the wavelength of E ２，２ A second input signal M of the first channel having a wavelength of ２ and the second input port I ２，２ is two wavelengths, F ２，１ and the wavelength of F ２，２ A second input signal N ２ configured to input The second bandpass filter is connected to the second input port I ２，１ The E incident from ２，１ and transmits the wavelength of E ２，２ and further configured to reflect a wavelength of The second total reflection structure transmits the E ２，１ and further configured to reflect a wavelength of The first total reflection structure receives the E ２，２ and further configured to reflect a wavelength of The first bandpass filter is configured to receive the E ２，２ and transmits the E ２，１ and further configured to reflect a wavelength of The sixth bandpass filter is connected to the second input port I ２，２ The F ２，１ and transmits the wavelength of E from the first bandpass filter. ２，２ and the wavelength of E ２，１ and the wavelength of F ２，２ configured to reflect a wavelength of The sixth total reflection structure is configured to receive the F ２，２ configured to reflect a wavelength of The fifth total reflection structure is the sixth bandpass filter. ２，１ The wavelength of E ２，２ and the wavelength of E ２，１ configured to reflect a wavelength of The fifth band-pass filter is configured to receive the F ２，２ from the fifth total reflection structure. ２，１ The wavelength of E ２，２ and the wavelength of E ２，１ configured to reflect a wavelength of The second common port receives a single channel multi-wavelength signal Q ２ and configured to output the multi-wavelength signal Q ２ The wavelength of E ２，１ The wavelength of E ２，２ The wavelength of F ２，１ and the wavelength of F ２，２ Includes wavelengths of A WDM element according to claim 16 or 17.

19. At least two second input ports I ２，１ and I ２，２ and a second common port, The second input port I ２，１ is two wavelengths, E ２，１ and the wavelength of E ２，２ A second input signal M of the first channel having a wavelength of ２ and the second input port I ２，２ is two wavelengths, F ２，１ and the wavelength of F ２，２ A second input signal N ２ configured to input The second bandpass filter is connected to the second input port I ２，１ The E incident from ２，１ and transmits the wavelength of E ２，２ and further configured to reflect a wavelength of The second total reflection structure transmits the E ２，１ and further configured to reflect a wavelength of The first total reflection structure receives the E ２，２ and further configured to reflect a wavelength of The first bandpass filter is configured to receive the E ２，２ and transmits the E ２，１ and further configured to reflect a wavelength of the at least one group of combiner splitter structures further comprising a third combiner splitter structure; the third combiner splitter structure comprises two bandpass filters and two total reflection structures; the two band filters included in the third combiner splitter structure include a fifth band filter and a sixth band filter; the two total reflection structures included in the third combiner splitter structure include a fifth total reflection structure and a sixth total reflection structure; The sixth bandpass filter is connected to the second input port I ２，２ The F ２，１ and transmits the wavelength of E from the first bandpass filter. ２，２ and the wavelength of E ２，１ and the wavelength of F ２，２ configured to reflect a wavelength of The sixth total reflection structure is configured to receive the F ２，２ configured to reflect a wavelength of The fifth total reflection structure is the sixth bandpass filter. ２，１ The wavelength of E ２，２ and the wavelength of E ２，１ configured to reflect a wavelength of The fifth band-pass filter is configured to receive the F ２，２ from the fifth total reflection structure. ２，１ The wavelength of E ２，２ and the wavelength of E ２，１ configured to reflect a wavelength of The second common port receives a single channel multi-wavelength signal Q ２ and configured to output the multi-wavelength signal Q ２ The wavelength of E ２，１ The wavelength of E ２，２ The wavelength of F ２，１ and the wavelength of F ２，２ Includes wavelengths of 17. The WDM component of claim 16.

20. Two Wavelengths, G ２，１ and the wavelength of G ２，２ A second input signal C of a third channel having a wavelength of ２ a second input port I configured to input ２，３ Further equipped with The fourth bandpass filter is connected to the second input port I ２，３ The second input signal C of the third channel having the two wavelengths ２ The above G ２，１ and transmits the wavelength of ２，２ and further configured to reflect a wavelength of The third total reflection structure receives the G ２，１ and further configured to reflect a wavelength of The fourth total reflection structure is configured to receive the G ２，２ and further configured to reflect a wavelength of The third bandpass filter is configured to receive the G ２，１ and reflecting the wavelength of the G from the fourth total reflection structure. ２，２ and further configured to transmit a wavelength of The second band filter is a filter that receives the G ２，１ and the wavelength of G ２，２ and further configured to reflect a wavelength of The second total reflection structure transmits the G ２，１ and the wavelength of G ２，２ and further configured to reflect a wavelength of The first bandpass filter is configured to receive the G ２，１ and the wavelength of G ２，２ and further configured to reflect a wavelength of The sixth band filter is a filter that is connected to the G ２，１ and the wavelength of G ２，２ and further configured to reflect a wavelength of The fifth total reflection structure is configured to receive the G ２，１ and the wavelength of G ２，２ and further configured to reflect a wavelength of The fifth bandpass filter is configured to receive the G ２，１ and the wavelength of G ２，２ and further configured to reflect a wavelength of The single-channel multi-wavelength signal Q output by the second common port. ２ is the above G ２，１ and the wavelength of G ２，２ Further including wavelengths of 20. The WDM component of claim 19.

21. Two four-port thin film filter TFFs, a first TFF and a second TFF, the four ports including port a, port b, port c, and port d, each of the TFFs including a sleeve and two fiber collimators; the first bandpass filter is fixed to the first TFF and disposed between two fiber collimators of the first TFF, and the second bandpass filter is fixed to the second TFF and disposed between two fiber collimators of the second TFF; For a lightwave input through each port a of the TFF, the transmitted light of the lightwave is output from port d and the reflected light is output from port b; for a lightwave input through port c, the transmitted light of the lightwave is output from port b and the reflected light is output from port d; The first input port I １，１ corresponds to port a of the first TFF, and the first input port I １，２ corresponds to port c of the first TFF, A port b of the first TFF is connected to a port a of the second TFF, and a port d of the first TFF is connected to a port c of the second TFF; The port d of the second TFF corresponds to the first common port.

16. The WDM component of claim 15.

22. four 4-port TFFs, a first TFF, a second TFF, a third TFF, and a fourth TFF, the four ports comprising port a, port b, port c, and port d, each of the TFFs comprising a sleeve and two fiber collimators; the first bandpass filter is fixed to the first TFF and disposed between two fiber collimators of the first TFF, the second bandpass filter is fixed to the second TFF and disposed between two fiber collimators of the second TFF, the third bandpass filter is fixed to the third TFF and disposed between two fiber collimators of the third TFF, and the fourth bandpass filter is fixed to the fourth TFF and disposed between two fiber collimators of the fourth TFF; For a lightwave input through each port a of the TFF, the transmitted light of the lightwave is output from port d and the reflected light is output from port b; for a lightwave input through port c, the transmitted light of the lightwave is output from port b and the reflected light is output from port d; The first input port I １，１ corresponds to port a of the first TFF, and the first input port I １，２ corresponds to port c of the first TFF, A port b of the first TFF is connected to a port a of the second TFF, and a port d of the first TFF is connected to a port c of the second TFF; The port d of the second TFF is connected to the port a of the third TFF, and the port c of the third TFF is connected to the first input port I １，３ Corresponding to, A port b of the third TFF is connected to a port a of the fourth TFF, and a port d of the third TFF is connected to a port c of the fourth TFF; The port d of the fourth TFF corresponds to the second common port.

17. The WDM component of claim 16.

23. 21. The WDM component of any one of claims 15 to 20, wherein each of the combiner splitter structures is implemented by using two TFFs, and for a lightwave input through port a of each of the TFFs, a transmitted light of the lightwave is output from port d and a reflected light is output from port b, and for a lightwave input through port c, a transmitted light of the lightwave is output from port b and a reflected light is output from port d.

24. A wavelength division multiplexing (WDM) component, comprising: at least two first exit ports, at least two bandstop filter groups, a first low-pass or high-pass filter group, and a first common port; The first common port receives a single-channel multi-wavelength output signal Q １ and the single-channel multi-wavelength output signal Q １ The wavelength of １，１ From the wavelength of E １，Ｘ１ and the wavelength of F １，１ From the wavelength of F １，Ｙ１ containing wavelengths of The first low-pass or high-pass filter group includes Z first low-pass or high-pass filters, and the single-channel multi-wavelength output signal Q １ By splitting Z1 channel multi-wavelength signal P １，ｋ１＝１…Ｚ１ and the multi-wavelength signal P １，ｋ１＝１…Ｚ１ A multi-wavelength signal P １，ｔ１＝１…Ｗ１ The multi-wavelength signal P １，ｔ１ is a multi-wavelength signal T １，ｔ１＝１…Ｗ１ The multi-wavelength signal T １，ｔ１ The Z1 first low-pass or high-pass filters include W1 first low-pass or high-pass filters, and the multi-wavelength signal P １，ｔ１＝１…Ｗ１ are within the stopband range of the corresponding first low-pass or high-pass filter among the W1 first low-pass or high-pass filters, and the t1-th first low-pass or high-pass filter among the W1 first low-pass or high-pass filters is １，ｔ１ and transmits a signal input to the t1 first low-pass or high-pass filter, k1 being an integer ranging from 1 to Z1, Z1 being an integer equal to or greater than W1, and the W1 second band-stop filters in the second band-stop filter group are configured to reflect the multi-wavelength signal T １，ｔ１＝１…Ｗ１ , signal M １，１ Signal M １，Ｘ１ X1 channel single wavelength signal, and signal N １，１ From signal N １，Ｙ１ wherein W1 is the greater of X1 and Y1, and when X1 is greater than Y1, the W1 second bandstop filters comprise Y1 second bandstop filters, or when X1 is less than Y1, the W1 second bandstop filters are part of Y1 second bandstop filters, or when X1 is equal to Y1, the W1 second bandstop filters are Y1 second bandstop filters, and the signal M １，１ from the signal M １，Ｘ１ The single wavelength signal of the X1 channels is １，１ From the wavelength of E １，Ｘ１ and the wavelength of the signal N １，１ to the signal N １，Ｙ１ The single-wavelength signals of the Y channels are １，１ from the wavelength of F １，Ｙ１ and the wavelength of F １，１ from the wavelength of F １，Ｙ１ The wavelengths of the jth second band-stop filter among the Y1 second band-stop filters are within the stopband range of the corresponding second band-stop filter, and the jth second band-stop filter among the Y1 second band-stop filters is a filter that detects the signal T １，ｔ１ Inside E １，ｉ１ , and a single wavelength signal M １，ｉ１ and the signal T input to the second band-elimination filter j1 is １，ｔ１ F in １，ｊ１ The wavelength of the single-wavelength signal N １，ｊ１ where t1 is an integer ranging from 1 to W1, Y1 is an integer equal to or greater than 1, and j1 is an integer ranging from 1 to Y1; Y1 second band-stop filters are １，１ to the signal N １，Ｙ１ The single-wavelength signals of the Y channels are converted into an output signal N １ and the j1 second band-stop filter among the Y1 second band-stop filters is a second different wavelength, and the j1 second band-stop filter is further configured to transmit a signal input to the j1 second band-stop filter, and the second different wavelength is the F １，１ from the wavelength of F １，Ｙ１ The wavelength of F １，ｊ１ does not include the wavelengths of The X1 first bandstop filters in the first bandstop filter group are １，１ from the signal M １，Ｘ１ The single-wavelength signals of the X1 channels are converted into an output signal M １ The X1 wavelengths are combined into the E １，１ From the wavelength of E １，Ｘ１ The wavelength of E １，１ From the wavelength of E １，Ｘ１ The wavelengths of the X1 first band-stop filters are each within the stopband range of the X1 first band-stop filters, and the i1th first band-stop filter among the X1 first band-stop filters is the E １，ｉ１ A signal M having a wavelength of １，ｉ１ and configured to transmit a signal input to the i1 first bandstop filter, where X1 is an integer greater than 1 and i1 is an integer ranging from 1 to X1, and the first other wavelength is a wavelength that is equal to or smaller than the E １，１ From the wavelength of E １，Ｘ１ It belongs to the wavelength of The at least two first exit ports include a first exit port I １，１ and the first exit port I １，２ The first exit port I １，１ is the first output signal M of the first channel having the X1 wavelengths. １ and the first input port I １，２ is the first output signal N of the second channel having the Y wavelengths. １ configured to output Wavelength division multiplexing WDM component.

25. A wavelength division multiplexing (WDM) component, comprising: at least two first exit ports, at least one group of combiner splitter structures, and a first common port; The first common port receives a single channel multi-wavelength signal Q １ and the multi-wavelength signal Q １ The wavelength of １，１ Wavelength of E １，２ The wavelength of F １，１ and the wavelength of F １，２ containing wavelengths of the at least one group of combiner splitter structures comprises a first combiner splitter structure; the first combiner splitter structure comprises two bandpass filters and two total reflection structures; The at least two first exit ports include a first exit port I １，１ and the first exit port I １，２ The first exit port I １，１ is two wavelengths, １，１ and the wavelength of E １，２ A first output signal M of a first channel having a wavelength of １ and the first output port I １，２ is two wavelengths, １，１ and the wavelength of F １，２ The first output signal N of the second channel having a wavelength １ configured to output the two bandpass filters include a first bandpass filter and a second bandpass filter; the two total reflection structures include a first total reflection structure and a second total reflection structure; The second bandpass filter receives the single-channel multi-wavelength signal Q from the first common port. １ The above E １，１ and transmits the wavelength of E １，２ The wavelength of F １，１ and the wavelength of F １，２ configured to reflect a wavelength of The first total reflection structure receives the E １，１ configured to reflect a wavelength of The second total reflection structure is the E １，２ The wavelength of F １，１ and the wavelength of F １，２ configured to reflect a wavelength of The first bandpass filter is configured to receive the E １，２ and transmitting the wavelength of F from the second total reflection structure. １，１ and the wavelength of F １，２ from the first total reflection structure. １，１ and reflects the wavelengths of the two wavelengths, １，１ and the wavelength of E １，２ The first output signal M of the first channel having a wavelength of １ , and the two wavelengths, the F １，１ and the wavelength of F １，２ The output signal N of the second channel having a wavelength of １ configured to obtain Wavelength division multiplexing WDM component.

26. A wavelength division multiplexing WDM component, comprising two four-port thin film filter TFFs, a first TFF and a second TFF, the four ports comprising port a, port b, port c, and port d, each of the TFFs comprising a sleeve and two fiber collimators; a first bandpass filter is fixed to the first TFF and disposed between two fiber collimators of the first TFF, and a second bandpass filter is fixed to the second TFF and disposed between two fiber collimators of the second TFF; A signal 1 having a first wavelength and a second wavelength is input through a port a of the first TFF, the first wavelength being within a passband range of the first TFF and the second wavelength being within a stopband range of the first TFF, the signal 1-1 of the first wavelength being output from a port d, and the signal 1-2 of the second wavelength being output from a port b; A signal 2 having a third wavelength and a fourth wavelength is input through a port c of the first TFF, both of the third wavelength and the fourth wavelength being within the stopband range of the first TFF, and the signal 2 having the third wavelength and the fourth wavelength is output from the port d; The port c of the first TFF is connected to the port a of the second TFF, and the port d of the first TFF is connected to the port c of the second TFF; the second wavelength is within a passband range of the second TFF, and the first wavelength, the third wavelength, and the fourth wavelength are all within the stopband range of the first TFF; and the signal 1-1 having the first wavelength, the signal 1-2 having the second wavelength, and the signal 2 having the third wavelength and the fourth wavelength are combined into a signal having four wavelengths output from a port d of the second TFF. Wavelength division multiplexing WDM component.

27. A wavelength division multiplexing WDM component, comprising two four-port thin film filter TFFs, a first TFF and a second TFF, the four ports comprising port a, port b, port c, and port d, each of the TFFs comprising a sleeve and two fiber collimators; a first bandstop filter is fixed to the first TFF and disposed between two fiber collimators of the first TFF; and a second bandstop filter is fixed to the second TFF and disposed between two fiber collimators of the second TFF; A signal 1 having a first wavelength and a second wavelength is input through a port a of the first TFF, the first wavelength being within a stopband range of the first TFF and the second wavelength being within a passband range of the first TFF, the signal 1-1 of the first wavelength being output from a port b, and the signal 1-2 of the second wavelength being output from a port d; A signal 2 having a third wavelength and a fourth wavelength is input through a port c of the first TFF, both of the third wavelength and the fourth wavelength being within the stopband range of the first TFF, and the signal 2 having the third wavelength and the fourth wavelength is output from the port b; The port b of the first TFF is connected to a port a of the second TFF, and the port d of the first TFF is connected to a port c of the second TFF; the second wavelength is within a stopband range of the second TFF, and the first wavelength, the third wavelength, and the fourth wavelength are all within the passband range of the first TFF; and the signal 1-1 having the first wavelength, the signal 1-2 having the second wavelength, and the signal 2 having the third wavelength and the fourth wavelength are combined into a signal having four wavelengths output from a port d of the second TFF. Wavelength division multiplexing WDM component.

28. A wavelength division multiplexing WDM component comprising a Z-block structure, a plurality of isosceles right-angled triangular prism notches are separately disposed on two sides of the Z-block structure, the right-angled surfaces of the isosceles right-angled triangular prisms are perpendicular to the notches, the bevels of the isosceles right-angled triangular prisms of the notches on the same side are disposed in parallel, the notches on the two sides are disposed in a peer-to-peer manner opposite to the parallel disposed bevels, the notch on the first side comprises a notch used for a first input port, and the notch on the second side comprises a notch used for a first common port. a first triangular prism filter is disposed at each of the notches used for the first input port and the piano edge of the notch used for the first input port, and a band-stop filter thin film is plated on the bevel of the first triangular prism filter; a second triangular prism filter is disposed at each of the notches used for the first common port and the piano edge of the notch used for the first common port, and a first low-pass or high-pass filter thin film is plated on the bevel of the first triangular prism filter; , plated on the bevel of the second triangular prism filter, the bandstop filter thin film configured to reflect wavelengths within a specific range, the first entrance port configured to input a single channel signal having X wavelengths, the amount of wavelengths of the signal input through at least one notch used for the first entrance port among the plurality of notches being an integer greater than 1, the first low-pass or high-pass filter thin film configured to combine signals input through the plurality of first entrance ports and obtained based on the single channel multi-wavelength signals passing through the bandstop filter thin film to obtain a single channel signal having Y wavelengths, Y being the sum of the amount of wavelengths X input through all the first entrance ports, the first common port configured to output the single channel signal having the Y wavelengths obtained through combination, the bevel of the first triangular prism filter is parallel to the bevel of the isosceles right triangle prism of the notch in which the first triangular prism filter is located, the bevel of the second triangular prism filter isa wavelength division multiplexing WDM component in which the second triangular prism filter is juxtaposed to the bevel of the isosceles right triangular prism of the notch in which it is disposed;

29. 29. The WDM component of claim 28, wherein the first low-pass or high-pass filter thin film plated on the bevel of the second triangular prism filter disposed in the piano edge of the notch used for the first common port is used for total internal reflection.

30. The piano edge of the notch used for the first input port is further used for a second input port, and the notch on the first side further comprises a notch used for a second common port, a third triangular prism filter is disposed on each of the piano edges of the notch used for the second common port and the notch used for the second common port, and a second low-pass or high-pass filter thin film is plated on a bevel of the third triangular prism filter, and the second low-pass or high-pass filter thin film is plated on a bevel of the third triangular prism filter, and the second low-pass or high-pass filter thin film is based on a single channel signal having M wavelengths input through the second input port and passing through the band-stop filter thin film.

30. The WDM component of claim 28 or 29, further comprising: a first common port configured to combine signals acquired through at least one notch in a plurality of piano notches to obtain a single-channel signal having N wavelengths; a second common port configured to output the single-channel signal having the N wavelengths obtained through combining; the amount M of wavelengths of signals input through at least one notch used for the second input port in a plurality of piano notches is an integer greater than 1, N is the sum of the amount M of wavelengths input through all the second input ports; and the bevel of the third triangular prism filter is parallel to the bevel of an isosceles right triangular prism of a notch in which the third triangular prism filter is located.

31. A communication device comprising a WDM element according to any one of the preceding claims.

32. A WDM component manufacturing method, wherein a WDM component according to any one of claims 1 to 30 is obtained by disposing and / or connecting components in a WDM component according to any one of claims 1 to 30.

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