An optical communication device and system

Abstract

The application provides an optical communication device and system, each wavelength range corresponds to a dummy light filling unit, when receiving signal light not working in full wave state (i.e. only part of the wavelength is on wave), since the input port of each dummy light filling unit only corresponds to receiving signal light of a specific wavelength range, only the dummy light filling unit of the on wave wavelength position can receive signal light, and then the remaining dummy light filling units not receiving signal light can send dummy light, thereby realizing automatic filling of dummy light. This dummy light filling method does not need to detect the on wave / off wave wavelength, and can quickly fill the energy of the wavelength position not on wave after part of the wavelength is on wave / off wave, thereby maintaining the stable operation of the wide spectrum transmission system.

Description

Technical Field

[0001] This application relates to the field of optical communication technology, and more specifically, to an optical communication device and system. Background Technology

[0002] To continuously increase the capacity of fiber optic transmission systems, the transmission optical spectrum of wavelength division multiplexing (WDM) systems has evolved from the current C-band (6 THz) to the C+L band (12 THz), and may be further expanded in the future. However, for broadband optical systems, due to the stimulated Raman scattering (SRS) effect in optical fibers and the gain competition effect of optical amplifiers, there are strong interactions between different wavelengths. That is, when the channel combination changes, the power characteristics of individual channels may also change significantly. Therefore, achieving steady-state operation of broadband systems presents a significant technical challenge.

[0003] The main solution for achieving stable broadband transmission is to fill with dummy light, which involves filling spectrum channels without transmitted services with optical wavelengths that do not contain service information. These wavelengths do not contain actual information and are therefore called dummy light. Due to the introduction of dummy light, service transitions can be smoothly achieved by replacing signals with dummy light, so the transmission system can always operate at full wavelength, thus avoiding the uncertainty caused by different channel combinations and achieving steady-state operation of the broadband system.

[0004] However, in existing technologies, dummy light filling involves introducing a dummy light module into a broadband wavelength selective switch (WSS). Specifically, a detection module first detects the specific up-wave / down-wave wavelength, and then the WSS filters the dummy light spectrum input to the dummy light module to fill the positions of the non-up-wave wavelengths, maintaining full-wave transmission. This method requires detecting the down-wave wavelength first, while the WSS performs rapid dummy light filling. This process takes a relatively long time, thus affecting the transient stability of the optical layer. Summary of the Invention

[0005] This application provides an optical communication device and system that can quickly fill the energy at the un-uploaded wavelength positions after partial wavelength uploading / dropping occurs, thereby maintaining the stable operation of the broadband transmission system.

[0006] In a first aspect, this application provides an optical communication device, comprising: an input port group, a dummy light filling unit group, and an output port group, wherein the input port group is used to receive a first input signal light and transmit it to the dummy light filling unit group, the first input signal light comprising M signal lights with different wavelength values, the input port group comprising P input ports, the P input ports being respectively used to receive signal lights with different wavelength ranges, the first input signal light being received through M of the P input ports, where P and M are integers greater than 1, and P ≥ M; the dummy light filling unit group is used to receive the first input signal light and generate a first output signal light. The dummy light filling unit group includes P dummy light filling units. The first output signal light includes P signal lights. The P dummy light filling units correspond one-to-one with the P input ports. M of the P dummy light filling units are used to receive signal lights from the M input ports and transmit the M signal lights with different wavelength values ​​to the output port group. N of the P dummy light filling units are used to send dummy light, where N = PM. The output port group is used to receive the first output signal light. The output port group includes P output ports, and the P output ports correspond one-to-one with the P dummy light filling units.

[0007] Based on the above scheme, each wavelength range corresponds to a dummy light filling unit. When signal light that is not operating at full wavelength (i.e., only some wavelengths are on the spectrum) is received, since the input port of each dummy light filling unit is only designed to receive signal light within a specific wavelength range, only the dummy light filling units at the on-wavelength positions can receive the signal light. Consequently, the remaining dummy light filling units that do not receive the signal light can then transmit dummy light, thus achieving automatic dummy light filling. This dummy light filling method does not require detection of on-wave / dropped wavelengths and can quickly fill the energy at the non-on-wavelength positions after partial on-wave / dropped wavelengths occur, maintaining the stable operation of the broadband transmission system.

[0008] Among them, the M wavelength values ​​corresponding to the M different wavelength values ​​of the signal light belong to the M wavelength ranges corresponding to the M input ports.

[0009] It should be understood that the P dummy light filling units correspond to P different wavelength ranges, wherein each dummy light filling unit is used to send dummy light of the corresponding wavelength range when no input signal light is received.

[0010] The N dummy light filling units emit dummy light with different wavelength ranges.

[0011] In some implementations, the dummy light filling unit group for receiving the first input signal light and generating the first output signal light includes: the dummy light filling unit group for receiving the first input signal light and generating the first output signal light with constant optical power.

[0012] Based on the above scheme, the stability of optical signals can be maintained, avoiding signal distortion or transmission quality degradation caused by power fluctuations. Furthermore, constant output power can improve the performance of the optical fiber transmission system and ensure the stability and consistency of optical signals during transmission.

[0013] In some implementations, each of the P dummy light filling units corresponds to a preset optical power value, and generating a first output signal light with constant optical power includes: the M dummy light filling units adjusting the power of the M signal lights with different wavelengths to the corresponding preset optical power values ​​and then transmitting them to the output port group; the N dummy light filling units respectively sending dummy light with the corresponding preset optical power value.

[0014] Based on the above scheme, the power of the received signal light is adjusted according to different wavelength values ​​to obtain signal light with uniform power distribution, which is convenient for subsequent analysis.

[0015] In some implementations, the characteristic is that the P input ports are each connected to one of the P optical transmission units, and the P output ports are connected to a multiplexer.

[0016] Among them, the P optical transmission units are used for local up-wave transmission and can be referred to as local up-wave units.

[0017] In some implementations, a power monitoring unit group is further included between the input port group and the dummy light filling unit group, the power monitoring unit group being used to measure the optical power of the first input signal light.

[0018] In some implementations, the dummy light filling unit includes a first subunit, a second subunit, and an adjustable narrowband filter, wherein the first subunit is used to transmit white light; the adjustable narrowband filter is located between the first subunit and the second subunit and is used to transmit dummy light within a first wavelength value from the first subunit; and the second subunit is used to amplify the dummy light from the adjustable narrowband filter.

[0019] Based on the above scheme, the dummy light filling unit can emit high-quality dummy light.

[0020] In some implementations, the dummy light filling unit includes a first subunit, a 1×2 optical switch (OSW), and an adjustable narrowband reflector. The 1×2 OSW includes a common port, a first branch port, and a second branch port. The common port is connected to the first subunit, the first branch port is connected to the input port group, and the second branch port is connected to the adjustable narrowband reflector. The first subunit is used to transmit white light, which reaches the adjustable narrowband reflector through the second branch port. The adjustable narrowband reflector is used to reflect dummy light within a first wavelength range from the second branch port to the second branch port and then to the first subunit through the common port. The first subunit is also used to amplify the dummy light from the common port.

[0021] Based on the above scheme, the dummy light filling unit can emit high-quality dummy light.

[0022] Secondly, this application provides an optical communication device, comprising: an input port group, a power adjustment unit group, and an output port group, wherein the input port group is used to receive a second input signal light and transmit it to the power adjustment unit group, the second input signal light comprising H signal lights with different wavelength values, the input port group comprising G input ports, the G input ports being respectively used to receive signal lights with different wavelength ranges, the second input signal light being received through H input ports of the G input ports, where G and H are integers greater than 1, and G ≥ H; the power adjustment unit group is used to receive the second input signal light and generate a second output signal light with constant optical power, the power adjustment... The unit group includes G power adjustment units, each corresponding to one of the G input ports. Each of the G power adjustment units corresponds to a preset optical power value. The second output signal light includes H signal lights. The H power adjustment units among the G power adjustment units are used to receive the signal light from the H input ports, adjust the power of the H signal lights with different wavelengths to their corresponding preset optical power values, and then transmit them to the output port group. The output port group is used to receive the second output signal light and includes G output ports, each corresponding to one of the G power adjustment units.

[0023] Based on the above scheme, the power of the second input signal light is adjusted so that the signal light with a wavelength value of lower power can also reach a higher power, which is convenient for subsequent signal analysis.

[0024] In some implementations, the G input ports are connected to a wavelength division multiplexer, and the G output ports are respectively connected to G optical transmission units.

[0025] Among them, the P optical transmission units are used for local down-wave transmission and can be referred to as local down-wave transmission units.

[0026] In some implementations, a power monitoring unit group is further included between the input port group and the power adjustment unit group, the power monitoring unit group being used to measure the optical power of the second input signal light.

[0027] Thirdly, this application provides an optical communication device, comprising: a first optical communication device and a second optical communication device, wherein the first optical communication device is an optical communication device as described in any of the first aspects above, and the second optical communication device is an optical communication device as described in any of the second aspects above.

[0028] Fourthly, this application provides an optical communication system, comprising: a first optical communication device, a second optical communication device, a plurality of optical transmission units, a multiplexer, and a demultiplexer, wherein the first optical communication device is an optical communication device as described in any of the first aspects above, and the second optical communication device is an optical communication device as described in any of the second aspects above.

[0029] The plurality of optical transmission units include P local up-wave units and G local up-wave units.

[0030] In some implementations, the system further includes: at least one 2×2 optical switch (OSW), wherein the two input ports of the 2×2 OSW are respectively connected to two input ports in the input port group of the first optical communication device, and the two output ports of the 2×2 OSW are respectively connected to two dummy optical filling units in the dummy optical filling unit group of the first optical communication device; or, the two input ports of the 2×2 OSW are respectively connected to two input ports in the input port group of the second optical communication device, and the two output ports of the 2×2 OSW are respectively connected to two power adjustment units in the power adjustment unit group of the second optical communication device.

[0031] In some implementations, the system further includes: a P×P optical switch OSW, wherein the P input ports of the P×POSW are respectively connected to the P input ports of the input port group of the first optical communication device, and the P output ports of the P×POSW are respectively connected to the P groups of dummy optical filling units in the dummy optical filling unit group of the first optical communication device; or, the P input ports of the P×POSW are respectively connected to the P input ports of the input port group of the second optical communication device, and the P output ports of the P×POSW are respectively connected to the P groups of power adjustment units in the power adjustment unit group of the second optical communication device.

[0032] Fifthly, this application provides an optical communication method, comprising: an input port group receiving a first input signal light and transmitting it to a dummy light filling unit group, wherein the first input signal light includes M signal lights with different wavelength values, the input port group includes P input ports, the P input ports are respectively used to receive signal lights with different wavelength ranges, the first input signal light is received through M input ports of the P input ports, where P and M are integers greater than 1, and P ≥ M; the dummy light filling unit group receives the first input signal light and generates a first output signal light, the dummy light filling unit group including P... The system includes a dummy light filling unit. The first output signal light includes P signal lights. The P dummy light filling units correspond one-to-one with the P input ports. M of the P dummy light filling units are used to receive signal lights from the M input ports and transmit the M signal lights with different wavelengths to the output port group. N of the P dummy light filling units are used to send dummy light, where N = PM. The output port group receives the first output signal light and includes P output ports, each corresponding one-to-one with one of the P dummy light filling units.

[0033] In some implementations, the dummy light filling unit group receiving the first input signal light and generating the first output signal light includes: the dummy light filling unit group receiving the first input signal light and generating the first output signal light with constant optical power.

[0034] In some implementations, each of the P dummy light filling units corresponds to a preset optical power value, and generating a first output signal light with constant optical power includes: the M dummy light filling units adjusting the power of the M signal lights with different wavelengths to the corresponding preset optical power values ​​and then transmitting them to the output port group; the N dummy light filling units respectively sending dummy light with the corresponding preset optical power value.

[0035] Sixthly, this application provides an optical communication method, comprising: an input port group receiving a second input signal light and transmitting it to a power adjustment unit group, the second input signal light comprising H signal lights with different wavelength values, the input port group comprising G input ports, the G input ports being used to receive signal lights with different wavelength ranges respectively, the second input signal light being received through H input ports among the G input ports, where G and H are integers greater than 1, and G ≥ H; and the power adjustment unit group receiving the second input signal light and generating a second output signal light with constant optical power, the power adjustment unit group comprising G power adjustment units. The G power adjustment units correspond one-to-one with the G input ports. Each of the G power adjustment units corresponds to a preset optical power value. The second output signal light includes H signal lights. The H power adjustment units in the G power adjustment units are used to receive the signal light from the H input ports, and adjust the power of the H signal lights with different wavelengths to the corresponding preset optical power values ​​before transmitting them to the output port group. The output port group receives the second output signal light. The output port group includes G output ports, and the G output ports correspond one-to-one with the G power adjustment units. Attached Figure Description

[0036] Figure 1 A schematic diagram of an optical communication device 100 provided in this application.

[0037] Figure 2 This is a schematic diagram illustrating the working principle of an optical communication device 100 provided in this application.

[0038] Figure 3 This is a schematic diagram of a pseudo-light filling unit provided in this application.

[0039] Figure 4 This is a schematic diagram of another pseudo-light filling unit provided in this application.

[0040] Figure 5 A schematic diagram of an optical communication device 500 provided in this application.

[0041] Figure 6 A schematic diagram of an optical communication system 600 provided in this application.

[0042] Figure 7 A schematic diagram of an optical communication system provided in this application.

[0043] Figure 8 A schematic diagram of an optical communication system provided in this application.

[0044] Figure 9 A schematic diagram of an optical communication method 900 provided in this application.

[0045] Figure 10 This is a schematic diagram of an optical communication method 1000 provided in this application. Detailed Implementation

[0046] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0047] The optical transmission equipment and system provided in this application embodiment can be applied to optical fiber communication networks.

[0048] The following description is provided to facilitate understanding of the embodiments of this application.

[0049] First, the terms "first," "second," "third," "fourth," etc., and various numerical designations used in the textual descriptions or drawings of the embodiments of this application shown below are merely for descriptive convenience and are not intended to describe a specific order or sequence, nor are they intended to limit the scope of the embodiments of this application. For example, distinguishing different states of optical signals after different steps, etc.

[0050] Second, the terms “comprising” and “having” and any variations thereof in the embodiments of this application shown below are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products or devices.

[0051] Third, in the embodiments described below in this application, dummy light is an optical signal that does not contain service information, while the corresponding light signal can be a true wave optical signal, that is, an optical signal that carries service information.

[0052] Fourth, in the embodiments of this application, " / " can indicate that the objects before and after are in an "or" relationship. For example, A / B can mean A or B. "And / or" can be used to describe three relationships between the related objects. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. Here, A and B can be singular or plural.

[0053] Fifth, in the embodiments of this application, the words "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Embodiments or designs described as "exemplary" or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. The use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner for ease of understanding.

[0054] Sixth, in the embodiments of this application, the same reference numerals are used to denote the same component or part. Furthermore, the parts in the drawings are not drawn to scale, and the dimensions and sizes of the parts shown are merely exemplary and should not be construed as limiting this application.

[0055] To address the technical problems described in the background section, this application provides an optical communication device 100, specifically as follows: Figure 1 As shown, the optical communication device 100 includes an input port group 110, a dummy light filling unit group 120, and an output port group 130. It should be understood that the optical communication device 100 is located at the transmitting end of the signal light.

[0056] The input port group 110 is used to receive the first input signal light and transmit it to the dummy light filling unit group 120. The first input signal light includes M signal lights with different wavelength values. The input port group 110 includes P input ports, which are used to receive signal lights with different wavelength ranges. The first input signal light is received through M of the P input ports, where P and M are integers greater than 1, and P ≥ M. It should be understood that the M wavelength values ​​corresponding to the M signal lights with different wavelength values ​​belong to the M wavelength ranges corresponding to the M input ports.

[0057] The dummy light filling unit group 120 is used to receive the first input signal light and generate the first output signal light. The dummy light filling unit group 120 includes P dummy light filling units. The first output signal light includes P signal beams. Each of the P dummy light filling units corresponds one-to-one with one of the P input ports. M of the P dummy light filling units are used to receive signal light from the M input ports and transmit the M signal beams of different wavelengths to the output port group 130. N of the P dummy light filling units are used to transmit dummy light, where N = PM. Alternatively, the M dummy light filling units that receive signal light from the M input ports are used to transmit the M signal beams of different wavelengths to the output port group 130, and the N dummy light filling units that do not receive signal light from the M input ports are used to transmit dummy light, where N = PM.

[0058] The output port group 130 is used to receive the first output signal light. The output port group 130 includes P output ports, and each of the P output ports corresponds to one of the P dummy light filling units.

[0059] It should be understood that in the optical communication device 100 of this application, each wavelength range corresponds to a dummy light filling unit. When signal light that is not operating in full-wave mode (i.e., only some wavelengths are on-wave) is received, since the input port of each dummy light filling unit only receives signal light within a specific wavelength range, only the dummy light filling units at the on-wave wavelength position can receive the signal light. The remaining dummy light filling units that do not receive the signal light can then transmit dummy light, which is then transmitted through the output port group to a multiplexer or WSS for filtering, thereby achieving automatic dummy light filling. This dummy light filling method does not require detection of on-wave / dropped wavelengths and can quickly fill the energy at the non-on-wave wavelength positions after partial on-wave / dropped wavelengths occur, maintaining the stable operation of the broadband transmission system.

[0060] It should be noted that the P input ports are used to receive signal light in different wavelength ranges. This can be understood as follows: each of the P input ports is connected to one of the P optical fibers, and each input port is used to receive signal light in a specific wavelength range. That is, each input port corresponds to a wavelength range, and the wavelength ranges corresponding to different input ports are not exactly the same. In other words, the P input ports correspond to P wavelength ranges, and these P wavelength ranges are not entirely the same.

[0061] It should be understood that the aforementioned first input signal light is a signal light that is not operating at full wavelength; that is, only a portion of the wavelengths in the first input signal light carry information. This portion of the wavelengths includes M wavelengths, and the signal light of these M wavelengths is transmitted through M optical fibers. In other words, the first input signal light includes M signal lights with different wavelength values. This first input signal light is received through M input ports corresponding to these M wavelength values.

[0062] Optionally, the P input ports are each connected to one of the P optical transport units (OTUs), and the P output ports are connected to the multiplexer. These P OTUs are used for local up-wave transmission and can be referred to as local up-wave units. Furthermore, the multiplexer combines single optical signals from different wavelengths into a single multi-channel optical signal, allowing it to be transmitted over the same fiber optic channel. Optionally, the multiplexer can be a WSS or a multiplexer (MUX).

[0063] Optionally, the dummy light filling unit group 120 for receiving the first input signal light and generating the first output signal light includes: the dummy light filling unit group 120 for receiving the first input signal light and generating a first output signal light with constant optical power. It should be understood that the optical power of the first output signal light can be a preset value.

[0064] Specifically, each of the P dummy light filling units corresponds to a preset optical power value. The M dummy light filling units adjust the power of the M signal lights with different wavelengths to the corresponding preset optical power values ​​and then transmit them to the output port group 130. The N dummy light filling units send dummy light with the corresponding preset optical power values.

[0065] It should be understood that when the dummy light filler unit group is operating, it can maintain the automatic power control (APC) mode, keeping the output signal light power constant. Each dummy light filler unit in the group also operates in APC mode and maintains a constant output signal light power. This method maintains the stability of the optical signal, avoids signal distortion or transmission quality degradation due to power fluctuations, and the constant output power improves the performance of the fiber optic transmission system, ensuring the stability and consistency of the optical signal during transmission.

[0066] The working principle of the optical communication device 100 will be introduced below in conjunction with specific scenarios.

[0067] For scenarios involving certain wavelengths, such as... Figure 2 As shown, for example, assuming M=2, meaning the first input signal light includes optical signals with two wavelength values ​​and is received through two input ports, the wavelengths being wavelength 1 and wavelength 2, and the corresponding input ports being input port 1 and input port 2, then when the input port group receives the signal light, all dummy light filling units will actively start working and enter APC working mode. The dummy light filling units corresponding to input port 1 and input port 2 control the pump current in an APC manner, thereby adjusting the power of the signal light and maintaining a constant output power. The remaining dummy light filling units 2, 3, 4, ..., P all transmit dummy light with constant power. After the signal light and dummy light output from the dummy light filling unit group enter the multiplexer through the output port group, the multiplexer detects and distinguishes the signal light and dummy light, and filters them respectively through the established (pre-configured) wavelength cross-relationship and synthesizes a comb spectrum, thus allowing it to enter the line fiber for transmission in full-wavelength mode.

[0068] It should be understood that for a dummy light filling unit, there are two situations to maintain a constant output power: one is that when a signal light is received, the power of the signal light is adjusted by adjusting the pump current to maintain a constant output power; the other is that when no signal light is received, a dummy light with a constant power is transmitted.

[0069] Optionally, a power monitoring unit group is further included between the input port group 110 and the dummy light filling unit group 120. This power monitoring unit group measures the optical power of the first input signal light. The power monitoring unit group includes P power monitoring units, each located between an input port and a dummy light filling unit, used to monitor the power of the signal light input at the corresponding input port. When the input port group receives signal light, all dummy light filling units will actively start working. Alternatively, when the power monitoring unit group detects that the power of the signal light received by the input port group is greater than a first threshold, all dummy light filling units will actively start working. Optionally, the power monitoring unit group detecting that the power of the signal light received by the input port group is greater than the first threshold includes: at least one power detection unit in the power monitoring unit group detecting that the power of the signal light is greater than the first threshold.

[0070] For scenarios where certain wavelengths are dropped, such as Figure 2 As shown, for example, assuming that the signal light at wavelength 2 disappears or its power decreases due to a fault in the optical transmission unit corresponding to wavelength 2 or because the data on wavelength 2 has been transmitted completely, then when the power of the signal light received at input port 2 is less than the second threshold, the dummy light filling unit 2 continues to operate in APC mode and maintains a constant output power, or the dummy light filling unit 2 increases its output power. The signal light and dummy light output by the dummy light filling unit group enter the multiplexer through the output port group. The multiplexer detects the dropped wavelength, maintains the wavelength crossover relationship unchanged, and thus enters the line fiber for transmission in full-wavelength mode. Optionally, the multiplexer can also release the preset insertion loss at wavelength 2, thereby compensating for the impact of missing input signals on the system transmission performance.

[0071] For scenarios involving the recovery of the previous wave, such as Figure 2 As shown, for example, after the optical transmission unit corresponding to wavelength 2 resumes operation, the signal light of wavelength 2 resumes its upwave, and the corresponding dummy light filling unit 2 continues to maintain constant output power in APC mode, or resumes normal power. At this time, the combiner will detect whether the restored wavelength is consistent with the dummy light wavelength before restoration. If they are consistent, the wavelength crossover relationship remains unchanged; if they are inconsistent, the corresponding wavelength crossover relationship needs to be switched again. Optionally, if the preset insertion loss is released when the wavelength is dropped, the preset insertion loss can be restored when the upwave is restored.

[0072] The principle of filling fake light with fake light units is introduced below.

[0073] Figure 3 This is a schematic diagram of a pseudo-light filling unit provided in this application.

[0074] like Figure 3 As shown, the dummy light filling unit includes a first subunit 310, a second subunit 320, and a tunable narrowband filter (TF) 330.

[0075] The first subunit 310 is used to transmit white light. In this application, white light can be understood as full-spectrum or broadband signal light, which does not carry any service data.

[0076] An adjustable narrowband filter 330 is located between the first subunit 310 and the second subunit 320, and is used to transmit white light from the first subunit 310 within a first wavelength range (or, to filter out light outside the first wavelength range from the white light transmitted by the first subunit). Optionally, the first wavelength range is the maximum single-wavelength spectral bandwidth, for example, the frequency corresponding to any wavelength in the first wavelength range is no more than 500 GHz away from the frequency corresponding to a specified wavelength. Optionally, the specified wavelength is pre-configured.

[0077] The second subunit 320 is used to amplify the dummy light from the tunable narrowband filter 330.

[0078] In addition, the dummy light filling unit also includes a light sensor (LS) detector 340 located at the input of the dummy light filling unit.

[0079] When there is no signal light input to the dummy light filling unit, the first subunit 310 sends dummy light, which is filtered by the adjustable narrowband filter 330 and then amplified by the second subunit 320, thereby realizing the transmission of high-performance dummy light signals.

[0080] When there is signal light input to the dummy light filling unit, the signal light enters the dummy light filling unit from the top-level signal detection detector 340. The top-level signal detection detector 340 adjusts the center wavelength of the adjustable narrowband filter 330 to the center wavelength of the signal light, and then the power is adjusted by the first sub-unit 310 and the second sub-unit 320. Finally, the adjustable narrowband filter 330 filters out excess noise.

[0081] Figure 4 This is a schematic diagram of another pseudo-light filling unit provided in this application.

[0082] like Figure 4 As shown, the dummy light filling unit includes a first subunit 410, a 1×2 optical switch OSW 420, and an adjustable narrowband reflector 430.

[0083] The 1×2OSW 420 includes a common port 421, a first branch port 422, and a second branch port 423. The common port 421 is connected to the first sub-unit 410, the first branch port 422 is connected to the input port group, and the second branch port is connected to the adjustable narrowband reflector 430.

[0084] The first subunit 410 is used to transmit white light, which reaches the adjustable narrowband reflector 430 through the second branch port 423.

[0085] The adjustable narrowband reflector 430 is used to reflect dummy light from the second branch port 423 within the first wavelength range to the second branch port 423 (or, to filter out light outside the first wavelength range from the white light sent by the first sub-unit and reflect it), and reaches the first sub-unit 410 through the common port 421.

[0086] The first subunit 410 is also used to amplify the dummy light from the common port 421.

[0087] In addition, the dummy light filling unit also includes a light sensor (LS) detector 440 located at the input of the dummy light filling unit.

[0088] When there is no signal light input to the dummy light filling unit, the first subunit 410 sends dummy light to the common port 421 of the 1×2OSW 420, then through the second branch port 423 of the 1×2OSW 420 to the adjustable narrowband reflector 430. After being reflected by the adjustable narrowband reflector 430, it returns to the second branch port 423 of the 1×2OSW 420, and then through the common port 421 of the 1×2OSW 420 to the first subunit 410. Finally, the first subunit 410 amplifies the signal, thereby realizing the transmission of a high-performance dummy light signal.

[0089] When there is a signal light input to the dummy light filling unit, the signal light enters the dummy light filling unit from the top signal detection detector 440, enters the first sub-unit through the first branch port 422 and the common port 421, and is adjusted by the power of the first sub-unit.

[0090] The above scheme achieves automatic filling of false light without relying on rapid detection and rapid control in terms of physical mechanism. It can fill the energy of the un-uploaded or faulty wave positions as soon as possible after the wave is uploaded at some wavelengths or after a fault occurs, thereby maintaining the stable operation of the broadband transmission system.

[0091] Furthermore, compared to existing solutions, the reduced insertion loss within the station leads to an improved optical signal-to-noise ratio (OSNR) of the transmission system. Additionally, since the optical transmission unit is directly connected to the dummy optical filler unit, which provides power regulation, the amplification power of the built-in amplifier in the optical transmission unit can be reduced or eliminated altogether, thereby reducing the power consumption of the optical transmission unit.

[0092] The above scheme involves dummy light filling at the transmitting end of the signal light to achieve full-wavelength signal light and maintain the stable operation of the broadband transmission system. However, interference and loss occur during signal light transmission, causing significant variations in the power of different wavelengths of the signal light upon arrival at the receiving end. For example, some wavelengths of the received second input signal light may have low power, hindering subsequent signal analysis. To overcome this problem, the power of the second input signal light can be amplified, enabling even lower-power wavelengths to achieve higher power, thus facilitating subsequent signal analysis.

[0093] However, when the power of the second input signal light is amplified in this way, the power of the signal light of the wavelength that originally had sufficient power is also amplified, which not only increases the cost, but also brings unnecessary risks.

[0094] To address the aforementioned problems, this application also provides an optical communication device 500, specifically as follows: Figure 5 As shown, the optical communication device 500 includes an input port group 510, a power adjustment unit group 520, and an output port group 530.

[0095] The input port group 510 is used to receive the second input signal light and transmit it to the power adjustment unit group 520. The second input signal light includes H signal lights with different wavelength values. The input port group 510 includes G input ports, which are used to receive signal lights with different wavelength ranges. The second input signal light is received through H input ports among the G input ports. G and H are integers greater than 1, and G≥H.

[0096] The power adjustment unit group 520 is used to receive the second input signal light and generate a second output signal light with constant optical power. The power adjustment unit group 520 includes G power adjustment units, each of which corresponds to one of the G input ports. Each of the G power adjustment units corresponds to a preset optical power value. The second output signal light includes H signal lights. The H power adjustment units in the G power adjustment units are used to receive the signal light from the H input ports and adjust the power of the H signal lights with different wavelengths to their corresponding preset optical power values ​​before transmitting them to the output port group 530. Alternatively, the H power adjustment units in the G power adjustment units that receive the signal light from the H input ports are used to adjust the power of the H signal lights with different wavelengths to their corresponding preset optical power values ​​before transmitting them to the output port group 530.

[0097] The output port group 530 is used to receive the second output signal light. The output port group 530 includes G output ports, and each of the G output ports corresponds to one of the G power adjustment units.

[0098] It should be understood that in the optical communication device 500 of this application, each wavelength range corresponds to a power adjustment unit. When signal light is received, since the input port of each power adjustment unit only corresponds to receiving signal light of a specific wavelength range, the power of signal light of different wavelength ranges can be adjusted separately, thereby maintaining constant output power and maintaining stable operation of the broadband transmission system.

[0099] It should be noted that the G input ports are used to receive signal light in different wavelength ranges. This can be understood as follows: each of the G input ports is connected to one of the G optical fibers, and each input port is used to receive signal light in a specific wavelength range. In other words, each input port corresponds to a wavelength range, and the wavelength ranges corresponding to different input ports are not exactly the same. That is to say, the G input ports correspond to G wavelength ranges, and these G wavelength ranges are not entirely the same.

[0100] It should be understood that the aforementioned second input signal light includes H signal lights with different wavelength values, and the power of the signal lights with different wavelength values ​​is not exactly the same.

[0101] Optionally, G input ports are connected to the demultiplexer, and G output ports are each connected to one of G optical transmission units. These G optical transmission units are used for local downspinning and can be referred to as local downspinning units. Additionally, the demultiplexer is used to separate different wavelength signals from the mixed transmitted optical signal, enabling them to be processed or transmitted independently. The demultiplexer can separate optical signals of different wavelengths onto different output ports. Optionally, the demultiplexer can be a WSS or a demultiplexer (DeMUX).

[0102] Specifically, each of the G power adjustment units corresponds to a preset optical power value. The H power adjustment units adjust the power of the signal light with different wavelengths of the H channels to the corresponding preset optical power values ​​and then transmit them to the input port group 510130.

[0103] It should be understood that when the power adjustment unit group 520 is working, it can maintain the automatic power control (AGC) mode to keep the output signal light power constant. Each power adjustment unit in the power adjustment unit group 520 also works in APC mode and keeps the output signal light power constant.

[0104] The working principle of the optical communication device 500 will be introduced below in specific scenarios.

[0105] For example, assuming H = 2, meaning the first input signal light includes optical signals with H wavelength values, and is received through two input ports, the upper wavelengths are wavelength 1 and wavelength 2, and the corresponding input ports are input port 1 and input port 2, then when the input port group receives the signal light, power adjustment unit 1 and power adjustment unit 2 start working and enter APC working mode. Specifically, power adjustment unit 1 and power adjustment unit 2 control the pump current to adjust the power of the signal light and maintain a constant output power; the remaining power adjustment units 3, 4, ..., G can be inactive.

[0106] The above method adjusts the power of the received signal light according to different wavelength values ​​to obtain signal light with uniform power distribution, which facilitates subsequent analysis.

[0107] This application also provides an optical communication system, specifically as follows: Figure 6 As shown, the optical communication system 600 includes an optical communication device 100, an optical transmission unit, and a multiplexer, and / or includes an optical communication device 500, an optical transmission unit, and a demultiplexer.

[0108] It should be understood that the relationships between the various devices and apparatuses in the optical communication system 600 have been explained above and will not be repeated here.

[0109] It should be understood that the dummy light filling unit in the optical communication device 100 or the power adjustment unit in the optical communication device 500 can both have the function of power adjustment, and different dummy light filling units correspond to different wavelength ranges, and different power adjustment units correspond to different wavelength ranges.

[0110] To ensure that different dummy light filling units can more accurately acquire signal light within the desired wavelength range, an optical switch (OSW) can be installed before the dummy light filling unit (or before its corresponding input port) to separate signal light from different wavelength ranges and transmit them separately to the corresponding dummy light filling unit. Similarly, the aforementioned dummy light filling unit can be replaced with a power adjustment unit.

[0111] For example, the dummy optical filler unit group includes C-band and L-band dummy optical filler units. To ensure that the up-wave wavelength of the optical transmission unit does not conflict with that of the dummy optical filler unit, a 2×2 OSW is added to both the optical transmission unit and the dummy optical filler unit group. When the dummy optical filler unit's built-in LS detects the specific wavelength band of the input wavelength of the optical transmission unit, it controls the OSW to switch, allowing the signal from the optical transmission unit to enter the corresponding band of the dummy optical filler unit. Similarly, the aforementioned dummy optical filler unit can be replaced with a power adjustment unit.

[0112] like Figure 7As shown, the optical communication system 600 may also include at least one 2×2 optical switch (OSW).

[0113] The two input ports of the 2×2OSW are respectively connected to two input ports in the input port group of the first optical communication device, and the two output ports of the 2×2OSW are respectively connected to two dummy light filling units in the dummy light filling unit group of the first optical communication device; or, the two input ports of the 2×2OSW are respectively connected to two input ports in the input port group of the second optical communication device, and the two output ports of the 2×2OSW are respectively connected to two power adjustment units in the power adjustment unit group of the second optical communication device.

[0114] For example, each dummy light filling unit in the dummy light filling unit group corresponds to a specific wavelength range (i.e., it cannot amplify wavelengths other than this specific wavelength range). In this case, a P×POSW stage is added between the optical transmission unit and the dummy light filling unit. Wavelength information is detected based on LS, and the P×POSW switches the signal light of different wavelength ranges to the corresponding dummy light filling unit. Similarly, the above-mentioned dummy light filling unit can be replaced by a power adjustment unit.

[0115] like Figure 8 As shown, the optical communication system 600 may further include a P×P optical switch OSW. Optionally, the optical communication system 600 may further include a G×G optical switch OSW. The P input ports of the P×P OSW are respectively connected to the P input ports of the input port group of the first optical communication device, and the P output ports of the P×P OSW are respectively connected to the P groups of dummy optical filling units in the dummy optical filling unit group of the first optical communication device; the G input ports of the G×G OSW are respectively connected to the G input ports of the input port group of the second optical communication device, and the G output ports of the G×G OSW are respectively connected to the G groups of power adjustment units in the power adjustment unit group of the second optical communication device.

[0116] This application also provides an optical communication method 900, which is executed by an optical communication device 100, such as... Figure 9 As shown, the method includes the following steps:

[0117] S910, the input port group receives the first input signal light and transmits it to the dummy light filling unit group. The first input signal light includes M signal lights with different wavelength values. The input port group includes P input ports. The P input ports are used to receive signal lights with different wavelength ranges. The first input signal light is received through M input ports among the P input ports. P and M are integers greater than 1, and P≥M.

[0118] S920, the dummy light filling unit group receives the first input signal light and generates the first output signal light. The dummy light filling unit group includes P dummy light filling units. The first output signal light includes P signal lights. The P dummy light filling units correspond one-to-one with the P input ports. Among the P dummy light filling units, the M dummy light filling units that receive signal light from the M input ports are used to transmit the M signal lights with different wavelength values ​​to the output port group. Among the P dummy light filling units, the N dummy light filling units that do not receive signal light from the M input ports are used to send dummy light, where N = PM.

[0119] The process of the dummy light filling unit group receiving the first input signal light and generating the first output signal light includes: the dummy light filling unit group receiving the first input signal light and generating the first output signal light with constant optical power.

[0120] Specifically, each of the P dummy light filling units corresponds to a preset optical power value. Generating a first output signal light with constant optical power includes: M dummy light filling units adjusting the power of M signal lights with different wavelengths to their corresponding preset optical power values ​​and transmitting them to the output port group; and N dummy light filling units sending dummy lights with corresponding preset optical power values.

[0121] S930, the output port group receives the first output signal light, the output port group includes P output ports, and each of the P output ports corresponds to one of the P dummy light filling units.

[0122] This application also provides an optical communication method 1000, which is executed by an optical communication device 500, such as... Figure 10 As shown, the method includes the following steps:

[0123] S1010, the input port group receives the second input signal light and transmits it to the power adjustment unit group. The second input signal light includes H signal lights with different wavelength values. The input port group includes G input ports. The G input ports are used to receive signal lights with different wavelength ranges. The second input signal light is received through H input ports among the G input ports. G and H are integers greater than 1, and G≥H.

[0124] S1020, the power adjustment unit group receives the second input signal light and generates a second output signal light with constant optical power. The power adjustment unit group includes G power adjustment units, each of which corresponds to one of the G input ports. Each of the G dummy light filling units corresponds to a preset optical power value. The second output signal light includes H signal lights. The H power adjustment units among the G power adjustment units that receive the signal light from the H input ports are used to adjust the power of the H signal lights with different wavelengths to the corresponding preset optical power values ​​and then transmit them to the output port group.

[0125] S1030, the output port group receives the second output signal light, the output port group includes G output ports, and the G output ports correspond one-to-one with the G power adjustment units.

[0126] It should be understood that in the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs (DVDs)), or semiconductor media (e.g., solid-state drives (SSDs)).

[0127] The terms “component,” “module,” “system,” etc., used in this specification are used to refer to computer-related entities, hardware, firmware, combinations of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or a computer. As illustrated, applications running on computing devices and computing devices can both be components. One or more components may reside in a process and / or an execution thread, and components may be located on a single computer and / or distributed among two or more computers. Furthermore, these components can be executed from various computer-readable media on which various data structures are stored. Components can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system, and / or a network, such as the Internet interacting with other systems via signals).

[0128] Those skilled in the art will recognize that the various illustrative logical blocks and steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0129] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0130] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0131] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0132] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0133] In the above embodiments, the functions of each functional unit can be implemented entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions (programs). When the computer program instructions (programs) are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks (SSDs)).

[0134] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0135] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An optical communication device, characterized in that, include: Input port group, dummy light filling unit group, and output port group, among which, The input port group is used to receive the first input signal light and transmit it to the dummy light filling unit group. The first input signal light includes M signal lights with different wavelength values. The input port group includes P input ports. The P input ports are used to receive signal lights with different wavelength ranges. The first input signal light is received through M input ports among the P input ports. P and M are integers greater than 1, and P ≥ M. The dummy light filling unit group is used to receive the first input signal light and generate the first output signal light. The dummy light filling unit group includes P dummy light filling units. The first output signal light includes P signal lights. The P dummy light filling units correspond one-to-one with the P input ports. M dummy light filling units among the P dummy light filling units are used to receive the signal light from the M input ports and transmit the M signal lights with different wavelength values ​​to the output port group. N dummy light filling units among the P dummy light filling units are used to send dummy light, where N = PM. The output port group is used to receive the first output signal light. The output port group includes P output ports, and each of the P output ports corresponds to one of the P dummy light filling units.

2. The optical communication device according to claim 1, characterized in that, The dummy light filling unit group, used to receive the first input signal light and generate the first output signal light, includes: The dummy light filling unit group is used to receive the first input signal light and generate a first output signal light with constant optical power.

3. The optical communication device according to claim 2, characterized in that, Each of the P dummy light filling units corresponds to a preset optical power value. The first output signal light with constant generated optical power includes: The M dummy light filling units adjust the power of the M signal lights with different wavelengths to the corresponding preset optical power values, and then transmit them to the output port group. The N dummy light filling units each transmit dummy light with a corresponding preset optical power value.

4. The optical communication device according to any one of claims 1 to 3, characterized in that, The P input ports are connected to the P optical transmission units one by one, and the P output ports are connected to the multiplexer.

5. The optical communication device according to claim 2 or 3, characterized in that, Between the input port group and the dummy light filling unit group, there is also a power monitoring unit group, which is used to measure the optical power of the first input signal light.

6. The optical communication device according to any one of claims 1 to 5, characterized in that, The dummy light filling unit includes a first sub-unit, a second sub-unit, and an adjustable narrowband filter, wherein... The first sub-unit is used to transmit white light; The adjustable narrowband filter is located between the first subunit and the second subunit and is used to transmit dummy light from the first subunit within a first wavelength range; The second subunit is used to amplify the dummy light from the tunable narrowband filter.

7. The optical communication device according to any one of claims 1 to 5, characterized in that, The dummy light filling unit includes a first sub-unit, a 1×2 optical switch (OSW), and an adjustable narrowband reflector, wherein... The 1×2OSW includes a common port, a first branch port, and a second branch port, wherein the common port is connected to the first sub-unit, the first branch port is connected to the input port group, and the second branch port is connected to the adjustable narrowband reflector; The first subunit is used to transmit white light, which reaches the adjustable narrowband reflector through the second branch port; The adjustable narrowband reflector is used to reflect dummy light from the second branch port within a first wavelength range to the second branch port, and then to the first sub-unit through the common port; The first sub-unit is also used to amplify the dummy light from the common port.

8. An optical communication device, characterized in that, include: Input port group, power adjustment unit group, and output port group, among which, The input port group is used to receive the second input signal light and transmit it to the power adjustment unit group. The second input signal light includes H signal lights with different wavelength values. The input port group includes G input ports. The G input ports are used to receive signal lights with different wavelength ranges. The second input signal light is received through H input ports among the G input ports. G and H are integers greater than 1, and G≥H. The power adjustment unit group is used to receive the second input signal light and generate a second output signal light with constant optical power. The power adjustment unit group includes G power adjustment units, each of which corresponds to one of the G input ports. Each of the G power adjustment units corresponds to a preset optical power value. The second output signal light includes H signal lights. The H power adjustment units in the G power adjustment units are used to receive the signal light from the H input ports, adjust the power of the H signal lights with different wavelengths to the corresponding preset optical power values, and then transmit them to the output port group. The output port group is used to receive the second output signal light. The output port group includes G output ports, and each of the G output ports corresponds to one of the G power adjustment units.

9. The optical communication device according to claim 8, characterized in that, The G input ports are connected to the wavelength division multiplexer, and the G output ports are respectively connected to the G optical transmission units.

10. The optical communication device according to claim 8 or 9, characterized in that, The input port group and the power adjustment unit group also include a power monitoring unit group, which is used to measure the optical power of the second input signal light.

11. An optical communication device, characterized in that, It includes a first optical communication device and a second optical communication device, wherein the first optical communication device is the optical communication device according to any one of claims 1 to 7, and the second optical communication device is the optical communication device according to any one of claims 8 to 10.

12. An optical communication system, characterized in that, It includes a first optical communication device, a second optical communication device, multiple optical transmission units, a multiplexer, and a demultiplexer, wherein the first optical communication device is the optical communication device according to any one of claims 1 to 7, and the second optical communication device is the optical communication device according to any one of claims 8 to 10.

13. The system according to claim 12, characterized in that, The system also includes at least one 2×2 optical switch (OSW). The two input ports of the 2×2OSW are respectively connected to two input ports in the input port group of the first optical communication device, and the two output ports of the 2×2OSW are respectively connected to two dummy light filling units in the dummy light filling unit group of the first optical communication device. or, The two input ports of the 2×2OSW are respectively connected to two input ports in the input port group of the second optical communication device, and the two output ports of the 2×2OSW are respectively connected to two power adjustment units in the power adjustment unit group of the second optical communication device.

14. The system according to claim 12, characterized in that, The system also includes: a P×P optical switch (OSW) and a G×GOSW. The P input ports of the P×POSW are respectively connected to the P input ports in the input port group of the first optical communication device, and the P output ports of the P×POSW are respectively connected to the P groups of dummy light filling units in the dummy light filling unit group of the first optical communication device. or, The G input ports of the G×G OSW are respectively connected to the G input ports of the input port group of the second optical communication device, and the G output ports of the G×G OSW are respectively connected to the G power adjustment units of the power adjustment unit group of the second optical communication device.

15. An optical communication method, characterized in that, include: The input port group receives the first input signal light and transmits it to the dummy light filling unit group. The first input signal light includes M signal lights with different wavelength values. The input port group includes P input ports. The P input ports are used to receive signal lights with different wavelength ranges. The first input signal light is received through M input ports among the P input ports. P and M are integers greater than 1, and P ≥ M. The dummy light filling unit group receives the first input signal light and generates the first output signal light. The dummy light filling unit group includes P dummy light filling units. The first output signal light includes P signal lights. The P dummy light filling units correspond one-to-one with the P input ports. M dummy light filling units among the P dummy light filling units are used to receive signal light from the M input ports and transmit the M signal lights with different wavelength values ​​to the output port group. N dummy light filling units among the P dummy light filling units are used to send dummy light, where N = PM. The output port group receives the first output signal light, and the output port group includes P output ports, each of which corresponds to one of the P dummy light filling units.

16. The method according to claim 15, characterized in that, The dummy light filling unit group receives the first input signal light and generates the first output signal light, including: The dummy light filling unit group receives the first input signal light and generates a first output signal light with constant optical power.

17. The method according to claim 16, characterized in that, Each of the P dummy light filling units corresponds to a preset optical power value. The first output signal light with constant generated optical power includes: The M dummy light filling units adjust the power of the M signal lights with different wavelengths to the corresponding preset optical power values, and then transmit them to the output port group. The N dummy light filling units each transmit dummy light with a corresponding preset optical power value.

18. An optical communication method, characterized in that, include: The input port group receives the second input signal light and transmits it to the power adjustment unit group. The second input signal light includes H signal lights with different wavelength values. The input port group includes G input ports. The G input ports are used to receive signal lights with different wavelength ranges. The second input signal light is received through H input ports among the G input ports. G and H are integers greater than 1, and G≥H. The power adjustment unit group receives the second input signal light and generates a second output signal light with constant optical power. The power adjustment unit group includes G power adjustment units, each of which corresponds to one of the G input ports. Each of the G power adjustment units corresponds to a preset optical power value. The second output signal light includes H signal lights. The H power adjustment units in the G power adjustment units are used to receive the signal light from the H input ports, adjust the power of the H signal lights with different wavelengths to the corresponding preset optical power values, and then transmit them to the output port group. The output port group receives the second output signal light, and the output port group includes G output ports, each of which corresponds to one of the G power adjustment units.

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