Optical communication device, method and system

Abstract

The invention provides an optical communication device, method and system, and the device comprises a first combiner, N first adjustment devices, a second combiner and a first optical fiber, and the first combiner is used for carrying out the wave combination processing of M first signal lights, so as to obtain N second signal lights; the first adjusting device in the N first adjusting devices is used for adjusting the power of the corresponding second signal light; the second combiner is used for carrying out wave combination processing on L pieces of adjusted second signal light in the N pieces of adjusted second signal light to obtain third signal light. In the device, the first combiner is used for combining different signal lights according to wavelengths, then the power is adjusted, and then the second combiner is used for further combining and transmitting, so that the power output of the signal lights is ensured to be certain, the accumulated influence of the wavelength correlation of the SRS effect on the optical multiplexing section layer is avoided, and the reliability of the device is improved. And the safety and the stability of signal light transmission are improved.

Description

Technical Field

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

[0002] In wavelength division multiplexing (WDM) optical networks, the available bandwidth of an optical fiber is divided into multiple wavelengths, each of which is a channel. Different services from different users in the network can be transmitted on different channels.

[0003] In optical networks, due to the effect of stimulated Raman scattering (SRS), when the power of a wavelength or the combination of wavelength channels changes, other service lights will also change, resulting in a tilt in the optical power spectrum of the system.

[0004] At this point, not only will the corresponding services of the faulty optical fiber be interrupted, but the corresponding services of other optical fibers will also be affected. The SRS effect ultimately leads to a multiple-fold increase in the impact of the fiber optic fault, causing fault propagation in the optical system. Furthermore, the impact of the SRS effect in optical systems is wavelength-dependent, typically causing greater signal power fluctuations on specific channels, threatening the security of the optical communication system. Therefore, how to avoid the impact of the SRS effect in optical communication systems is an urgent technical problem to be solved. Summary of the Invention

[0005] In view of this, embodiments of this application provide an optical communication device, method, and system that avoids the impact of SRS effect on the optical communication system by separately adjusting the power of service light of different wavelengths.

[0006] In a first aspect, an optical communication device is provided, comprising a first multiplexer, N first adjustment devices, a second multiplexer, and a first optical fiber, wherein: the first multiplexer is used to perform multiplexing processing on M first signal lights to obtain N second signal lights, where M is a positive integer greater than or equal to 2, and N is a positive integer less than M; the N first adjustment devices correspond one-to-one with the N second signal lights, and the first adjustment device among the N first adjustment devices is used to adjust the power of the corresponding second signal light so that the power of the N adjusted second signal lights meets a first condition; the second multiplexer is used to perform multiplexing processing on L of the N adjusted second signal lights to obtain a third signal light, where L is a positive integer less than or equal to N; and the first optical fiber is used to transmit the third signal light.

[0007] In the aforementioned device, by first using a first multiplexer to combine different signal lights according to their wavelengths, then adjusting the power, and finally using a second multiplexer for further multiplexing and transmission, a constant power output of the signal lights is ensured. This prevents a failure of any one wavelength of the service light among the M first signal lights from causing a significant drop in the power of the other wavelengths, avoiding the cumulative impact of wavelength correlation of the SRS effect on the optical multiplexing section layer, and improving the security and stability of signal light transmission. Furthermore, compared to existing technologies that fill the upstream or ROADM with dummy light, the solution in this application has lower requirements for the optical power detection and adjustment devices, and the power adjustment speed is faster, resulting in a smaller impact from the SRS effect.

[0008] In conjunction with the first aspect, in some implementations of the first aspect, the power of the N adjusted second signal lights satisfies a first condition, including: the power of any one of the N adjusted second signal lights is within the power range of normal operation. Therefore, after combining the first signal lights, power adjustment prevents spectral tilt.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, the M first signal lights are obtained from an optical add-drop multiplexer. That is, the optical communication method of this application is implemented downstream of the ROADM, so that if a failure occurs upstream of the ROADM or at the ROADM, the method used in this application can still be effective.

[0010] In conjunction with the first aspect, some implementations of the first aspect further include K second adjustment devices, a third multiplexer, and a second optical fiber, wherein: the first multiplexer is further used to perform multiplexing processing on H fourth signal lights to obtain K fifth signal lights, where H is a positive integer greater than or equal to 2, and K is a positive integer less than H; the K second adjustment devices are used to adjust the power of the K fifth signal lights so that the power of the K adjusted fifth signal lights meets the second condition; the third multiplexer is used to perform multiplexing processing on Q of the K adjusted fifth signal lights to obtain a sixth signal light, where Q is a positive integer less than K; and the second optical fiber is used to transmit the sixth signal light.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, M first signal beams belong to the first band, and H fourth signal beams belong to the second band, with the first band and the second band being different. This enables multi-port scheduling of signal beams and fiber optic transmission.

[0012] In conjunction with the first aspect, in some implementations of the first aspect, a first optical amplifier is provided in the first optical fiber to amplify the signal light in the first wavelength band, and a second optical amplifier is provided in the second optical fiber to amplify the signal light in the second wavelength band. This allows the signal light in the two high-risk wavelength bands to be adjusted separately, further preventing coupling between the wavelengths of different service lights.

[0013] In conjunction with the first aspect, some implementations of the first aspect also include a fourth multiplexer and a third optical fiber, wherein: the fourth multiplexer is used to combine the third signal light and the sixth signal light to obtain the seventh signal light; the third optical fiber is used to transmit the seventh signal light. That is, after the power of the service light in the two bands is adjusted separately, they are combined and then transmitted together through the optical fiber.

[0014] In conjunction with the first aspect, some implementations of the first aspect further include a beam splitter and a fourth optical fiber, wherein: the beam splitter is used to split the third signal light to obtain an eighth signal light; the first optical fiber is used to transmit the third signal light, including: the first optical fiber is used to transmit the split third signal light; and the fourth optical fiber is used to transmit the eighth signal light. That is, the output end has two ports, and the two ports are used to transmit the signal light from the two transmission paths respectively.

[0015] In conjunction with the first aspect, in some implementations of the first aspect, the third signal light and the eighth signal light are used to transmit data for the same service. That is, the output end of the device connects to two transmission paths, one as the working path and the other as a backup path, thereby achieving protection of the optical fiber transmission path.

[0016] In conjunction with the first aspect, in certain implementations of the first aspect, where: M is greater than or equal to 16 and less than or equal to 128; N is greater than or equal to 2 and less than or equal to 8; L is greater than or equal to 2 and less than or equal to 8. Specifically, the values ​​of M can be 20, 32, or 64; the values ​​of N can be 2, 4, or 8; and the values ​​of L can be 2, 4, or 8. That is, the optical communication device of this application performs two-way multiplexing under these specific conditions, thereby avoiding the cumulative effect of wavelength correlation of the SRS effect on the optical multiplexing section layer, and improving the security and stability of signal optical transmission.

[0017] Secondly, a communication method is provided, comprising: performing multiplexing on M first signal lights to obtain N second signal lights, wherein M is a positive integer greater than or equal to 2 and N is a positive integer less than M; adjusting the power of the N second signal lights so that the power of the N adjusted second signal lights satisfies a first condition; performing multiplexing on L of the N adjusted second signal lights to obtain a third signal light, wherein L is a positive integer less than or equal to N; and transmitting the third signal light.

[0018] In the above method, different signal lights are first combined according to wavelength, then power is adjusted, and then further combined and transmitted, thereby ensuring a constant power output of the signal light. This ensures that if any wavelength of the service light among the M first signal lights fails, it will not cause a significant drop in the power of the other wavelengths of the service light, avoiding the cumulative effect of wavelength dependence of the SRS effect on the optical multiplex section (OMS), and improving the security and stability of signal light transmission. In addition, compared with the existing technology that fills the upstream or ROADM with dummy light, the solution of this application has lower requirements for the optical power detection and adjustment devices, and the power adjustment speed is faster, making the impact of the SRS effect smaller.

[0019] Thirdly, an optical transmission system is provided, including an optical receiving unit and an optical communication device that can be implemented as described in the first aspect, wherein the optical transmitting unit is used to transmit at least one first signal light.

[0020] Fourthly, an optical transmission system is provided, including an optical add-drop multiplexer and an optical communication device as described in the third aspect and any possible implementation thereof, wherein an optical receiving unit is used to receive a second signal light. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of an optical communication system provided in an embodiment of this application.

[0022] Figure 2 This is a schematic diagram of an optical communication device provided in an embodiment of this application.

[0023] Figure 3 This is a schematic diagram of an adjustment device provided in an embodiment of this application.

[0024] Figure 4 This is a schematic diagram of another optical communication device provided in an embodiment of this application.

[0025] Figure 5 This is a schematic diagram of another optical communication device provided in an embodiment of this application.

[0026] Figure 6This is a schematic diagram of an optical communication method provided in an embodiment of this application.

[0027] Figure 7 This is a schematic diagram of another communication method provided in an embodiment of this application.

[0028] Figure 8 This is a schematic diagram of another communication method provided in an embodiment of this application.

[0029] Figure 9 This is a schematic diagram of an optical communication system provided in an embodiment of this application. Detailed Implementation

[0030] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0031] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0032] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0033] In the description of the embodiments of this application, the terms "upper," "lower," "vertical," "horizontal," etc., indicate the orientation or positional relationship relative to the orientation or position of the components shown in the drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and not to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They can change accordingly depending on the orientation of the components in the drawings, and therefore should not be construed as limiting this application.

[0034] The terms “comprising” and “having” and any variations thereof used 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.

[0035] 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 the words "exemplary" or "for example" is intended to present the relevant concepts in a specific manner to facilitate understanding.

[0036] 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.

[0037] Figure 1 This is a schematic diagram of an optical communication system provided in an embodiment of this application. In a wavelength division multiplexing (WDM) optical network, the available bandwidth of the optical fiber is divided into multiple wavelengths, each wavelength being a channel. Different services from different users in the network can be transmitted on different channels.

[0038] like Figure 1 As shown in (a), in order to achieve flexible service scheduling, a reconfigurable optical add-drop multiplexer (ROADM) can be added in the middle of the optical fiber link. It is a device or equipment used in dense wavelength division multiplexing (DWDM) systems. It can dynamically adjust the wavelength of uplink or downlink services by arbitrarily assigning uplink or downlink services as needed through remote reconfiguration, thereby achieving the purpose of flexible service scheduling.

[0039] like Figure 1Figure (b) shows a schematic diagram of the device structure in a ROADM. Along the optical transmission direction, the ROADM includes, in sequence: at least one first optical fiber 110, a first multiplexer / splitter 120, at least one second optical fiber 130, a second multiplexer / splitter 140, and at least one fourth optical fiber 150. The first end of the at least one second optical fiber 130 is connected to the first multiplexer / splitter 120, and the second end of the at least one second optical fiber 130 is connected to the second multiplexer / splitter 140. The first multiplexer / splitter 120 and the second multiplexer / splitter 140 can be wavelength selection switches (WSS).

[0040] At least one first optical fiber 110 is used to transmit at least one first signal light, which includes N service lights. A first multiplexer / demultiplexer 120 is used to receive the at least one first signal light and perform multiplexing and demultiplexing processing on the N service lights. Furthermore, the first multiplexer / demultiplexer 120 can also be used for local down-wave processing. Subsequently, some or all of the N service lights are transmitted through at least one second optical fiber 130. A second multiplexer / demultiplexer 140 is used to perform multiplexing processing on multiple service lights. Furthermore, the second multiplexer / demultiplexer 140 can also be used for local up-wave processing to obtain a second signal light. The second signal light is transmitted through at least one fourth optical fiber 150.

[0041] like Figure 1 As shown in (c), when a fault occurs at the first fiber 110, such as a fiber breakage at least one of the first fibers 110, the first service light is lost. At at least one fourth fiber 150, due to the effect of stimulated Raman scattering (SRS), when the wavelength power or wavelength channel combination changes, the energy of other service lights will be transferred to the energy of the first service light, resulting in a tilt in the optical power spectrum of the system.

[0042] Figure 1Figure (d) illustrates a schematic diagram of optical power spectrum transmission tilt caused by the SRS effect. In this case, the power difference between the first service light and the service light of other wavelengths can reach 7 dB. That is, due to the coupling relationship between the wavelengths of different service lights, the power of other wavelengths of service light also drops significantly at at least 150 nm along a fourth fiber. At this point, not only is the service corresponding to the first service light interrupted, but the corresponding services of other service lights are also affected. The SRS effect ultimately leads to a multiple increase in the impact of fiber optic faults, causing fault propagation in the optical system. Furthermore, the impact of the SRS effect in optical systems is wavelength-dependent, typically causing greater signal power fluctuations on specific channels, threatening the security of the optical communication system. Therefore, how to avoid the impact of the SRS effect in optical communication systems is crucial.

[0043] In view of this, embodiments of this application provide an optical communication device, method, and system that avoids the impact of SRS effect on the optical communication system by adjusting the power of the signal light.

[0044] Figure 2 This is a schematic diagram of an optical communication device provided in an embodiment of this application. Figure 2 As shown, the optical communication device includes, in sequence along the optical transmission direction: a first multiplexer 210, N first adjustment devices 220, a second multiplexer 230, and a first optical fiber 240.

[0045] The first combiner 210 is used to perform multiplexing on M first signal beams to obtain N second signal beams, where M is a positive integer greater than or equal to 2 and N is a positive integer less than M.

[0046] One end of the first multiplexer 210 can be connected to at least one second optical fiber 260, from which the first multiplexer 210 obtains the M first signal beams. The other end of the first multiplexer 210 is connected to N third optical fibers 260, each of which corresponds one-to-one with one of the N second signal beams. Each of the N second signal beams is transmitted along its corresponding third optical fiber 260. The number of second optical fibers 260 can be equal to M or not, depending on the specific circumstances.

[0047] In some implementations, the M first signal lights are obtained from the ROADM. That is, the optical communication device of this application is located downstream of the ROADM, so that if a fault occurs upstream of the ROADM or at the ROADM, the optical communication device used in this application can still function. It should be understood that "obtained from the ROADM" in this application does not limit the direct connection between the ROADM and the optical communication device provided in the embodiments of this application. For example, in addition to being connected via at least one second optical fiber 260, other optical devices may be provided between the ROADM and the optical communication device, depending on the actual situation. The M first signal lights may include one or more service lights, depending on the actual situation.

[0048] In some implementations, M is greater than or equal to 16 and less than or equal to 128; N is greater than or equal to 2 and less than or equal to 8; and L is greater than or equal to 2 and less than or equal to 8. Specifically, M can take values ​​of 20, 32, or 64; N can take values ​​of 2, 4, or 8; and L can take values ​​of 2, 4, or 8. That is, the optical communication device of this application performs two-way multiplexing under these specific conditions, thereby avoiding the cumulative effect of wavelength correlation of the SRS effect on the optical multiplexing section layer and improving the security and stability of signal optical transmission.

[0049] In some implementations, the N second signal lights belong to the same wavelength band, which can be either the C-band or the L-band. The specific wavelength range of the C-band can be 1530nm to 1565nm, and the specific wavelength range of the L-band can be 1565nm to 1625nm. The C-band and L-band are risk bands that easily lead to SRS effects. When the N second signal lights belong to the C-band, the N second signal lights can be denoted as C1, C2, ..., C... N Similarly, when N second signal beams belong to the L band, these N second signal beams can be denoted as L1, L2, ..., L... N .

[0050] N first adjustment devices 220 correspond one-to-one with N second signal lights. The first adjustment device among the N first adjustment devices 220 is used to adjust the power of the corresponding second signal light so that the power of the N adjusted second signal lights meets the first condition.

[0051] In some implementations, the power of the N adjusted second signal lights satisfies a first condition, including that the power of any one of the N adjusted second signal lights is within the power range of normal operation. Therefore, by adjusting the power after combining the first signal lights, spectral tilt is avoided.

[0052] Among them, N first adjustment devices 220 can correspond one-to-one with N third optical fibers 260, and each of the N first adjustment devices 220 is disposed in the corresponding third optical fiber 260. One end of the first adjustment device 220 is connected to one end of the corresponding third optical fiber 260, and the other end of the first adjustment device 220 is connected to the other end of the corresponding third optical fiber 260. After receiving the second signal light from the corresponding third optical fiber 260, the first adjustment device 220 adjusts the second signal light and outputs the adjusted second signal light to the other end of the third optical fiber 260.

[0053] The second combiner 230 is used to perform combiner processing on L of the N adjusted second signal lights to obtain a third signal light, where L is a positive integer less than or equal to N.

[0054] The first optical fiber 240 is used to transmit the third signal light. In some implementations, an optical amplifier 250 may be provided in the first optical fiber 240 to amplify the third signal light. Furthermore, when the adjustment device specifically includes an optical attenuator, the optical amplifier 250 can also eliminate the need to pre-allocate attenuation when adjusting the power of the third signal light, further improving transmission performance.

[0055] In such Figure 2 In the illustrated device, different signal lights are first combined according to wavelength using a first multiplexer 210, then power is adjusted, and finally combined and transmitted using a second multiplexer 230, thereby ensuring a constant output power of the signal light. This ensures that if any wavelength of the service light among the M first signal lights fails, it will not cause a significant drop in the power of the other wavelengths, avoiding the cumulative effect of wavelength correlation of the SRS effect on the optical multiplex section (OMS), and improving the security and stability of signal light transmission. Furthermore, compared to existing technologies that fill the upstream or ROADM with dummy light, the solution in this application has lower requirements for the optical power detection and adjustment devices, and the power adjustment speed is faster, resulting in a smaller impact from the SRS effect.

[0056] In this application, a wavelength division multiplexer can also be understood as a wavelength division multiplexer. The specific form of the wavelength division multiplexer can be a wavelength selective switch, an optical coupler, a filter, an arrayed waveguide grating (AWG), etc., depending on the actual situation.

[0057] The regulating device referred to in this application is in conjunction with the following: Figure 3 Please provide an explanation.

[0058] Figure 3This is a schematic diagram of an adjustment device provided in an embodiment of this application. Figure 3 As shown, the adjustment device may specifically include a light adjustment unit 310 and a light monitoring unit 320.

[0059] The optical adjustment unit 310 includes an optical amplifier and / or an optical attenuator. The optical amplifier is used to increase the power of the second signal light, and the optical attenuator is used to reduce the power of the second signal light. The optical amplifier can be a fiber optic amplifier, a semiconductor optical amplifier, a solid-state laser amplifier, etc. For example, the optical amplifier can specifically be an erbium-doped fiber amplifier (EDFA), a Raman fiber amplifier (RFA), a stimulated brillouin scattering fiber amplifier (SBA), etc. The optical attenuator can be a fixed optical attenuator or a variable optical attenuator (VOA). Variable optical attenuators can specifically refer to mechanical VOAs, electro-optic tunable VOAs, magneto-optic VOAs, liquid crystal VOAs, microelectromechanical system VOAs, thermo-optic VOAs, acousto-optic VOAs, etc., determined according to the actual situation.

[0060] The light monitoring unit 320 is used to detect the power of the second signal light. Specifically, the light monitoring unit 320 may include a photodiode (PD) or an avalanche photodiode (APD).

[0061] In some implementations, the adjustment device also includes a control unit, which controls the light adjustment unit 310 to adjust the power of the second signal light based on the detection results of the light detection unit.

[0062] As an example, the following illustrates the specific implementation steps of each unit in an adjustment device:

[0063] (1) The adjustment device first completes the initial setup and parameter optimization, and then turns on the monitoring unit 320 to detect the power of the received second signal light.

[0064] (2) When the monitoring unit 320 detects that the difference between the power P1 of the second signal light and the target value P0 is greater than the adjustment threshold P TH At this time, the light adjustment unit 310 enters the adjustment mode.

[0065] (3) The light adjustment unit 310 is used to perform light amplification or light attenuation processing on the second signal light so that the difference between the power P'1 of the adjusted second signal light and the target value P0 is less than the adjustment threshold P.TH Therefore, the power of any one of the regulated second signal lights is within the power range of normal operation.

[0066] (4) The light adjustment unit 310 outputs the second signal light after the second adjustment.

[0067] It should be understood that Figure 3 The arrangement of the light adjustment unit 310 and the light monitoring unit 320 is merely an exemplary illustration. Furthermore, along the transmission direction of the second signal light, the light monitoring unit 320 may also be located before the light adjustment unit 310. Alternatively, the second signal light may be split, and the light monitoring unit 320 may be used to detect the split second signal light. This application does not impose any limitations on this arrangement.

[0068] In addition, this application also provides, for example Figures 4-5 Optical communication devices are used to enable wider application of optical communication devices in the system.

[0069] Figure 4 This is a schematic diagram of another optical communication device provided in an embodiment of this application. Figure 4 The optical communication device shown includes: a first multiplexer 410, N first adjustment devices 420, a second multiplexer 430, and a first optical fiber 440; in addition, the optical communication device also includes K second adjustment devices 450, a third multiplexer 460, and a second optical fiber 470.

[0070] The specific functions of the first combiner 410, the N first adjustment devices 420, the second combiner 430, and the first optical fiber 440 are as follows: Figure 3 The descriptions are similar, so I will not repeat them here.

[0071] In such Figure 4 In the apparatus shown in (a), the first combiner 410 is also used to perform multiplexing processing on H fourth signal beams to obtain K fifth signal beams, where H is a positive integer greater than or equal to 2 and K is a positive integer less than H.

[0072] K second adjustment devices 450 are used to adjust the power of K fifth signal lights so that the power of the K adjusted fifth signal lights meets the second condition.

[0073] In some implementations, the power of the K adjusted fifth signal lights satisfies a second condition, including that the power of any one of the K adjusted fifth signal lights is within the power range of normal operation. Therefore, by adjusting the power after combining the fifth signal lights, spectral tilt is avoided.

[0074] The second adjusting device 450 is similar in its configuration and specific structure to the first adjusting device 420. For details, please refer to [link / reference needed]. Figure 2 and Figure 3 This will not be elaborated upon here.

[0075] In some implementations, such as Figure 3 The description describes N second signal beams belonging to the first band and K fifth signal beams belonging to the second band. The first and second bands are either the C-band or the L-band, respectively. For example, if N second signal beams belong to the C-band and K fifth signal beams belong to the L-band, the N second signal beams can be denoted as C1, C2, ..., C... N The K fifth signal lights can be denoted as L1, L2, ..., L K This allows for the separate modulation of the signal light in the two high-risk wavelength bands, further preventing coupling between the wavelengths of different service light sources.

[0076] The third combiner 460 is used to combine Q of the K adjusted fifth signal beams to obtain the sixth signal beam, where Q is a positive integer less than K.

[0077] The second optical fiber 470 is used to transmit the sixth signal light.

[0078] When N second signal beams belong to the first band and K fifth signal beams belong to the second band, a first optical amplifier 481 is installed in the first optical fiber 440 to amplify the signal beams in the first band, and a second optical amplifier 482 is installed in the second optical fiber 470 to amplify the signal beams in the second band. This allows for the configuration of corresponding optical amplifiers based on the actual operating band of the signal beams, enabling joint adjustment of the optical amplifiers and the adjustment device to ensure the transmission of the signal beams within the optical fiber. Furthermore, when the adjustment device specifically includes an optical attenuator, the installation of the optical amplifiers also eliminates the need for pre-reserved attenuation when adjusting the power of the service beams, further improving transmission performance.

[0079] Utilize Figure 4 The device shown can realize multi-port scheduling of signal light and fiber optic transmission.

[0080] In some implementations, such as Figure 4 The apparatus shown in (b) further includes a fourth multiplexer 491 and a third optical fiber 492, wherein: the fourth multiplexer 491 is used to combine the third signal light and the sixth signal light to obtain the seventh signal light; the third optical fiber 492 is used to transmit the seventh signal light. That is, after the power of the service light in the two bands is adjusted separately, they are combined and then transmitted together through the optical fiber.

[0081] In addition, an optical amplifier can also be installed in the third optical fiber 492 to amplify the seventh signal light.

[0082] Figure 5 This is a schematic diagram of another optical communication device provided in an embodiment of this application. Figure 5 The optical communication device shown includes: a first multiplexer 510, N first adjustment devices 520, a second multiplexer 530, and a first optical fiber 540; in addition, the optical communication device also includes a fourth optical fiber 550 and a splitter 580.

[0083] The specific functions of the first combiner 510, the N first adjustment devices 520, the second combiner 530, and the first optical fiber 540 are as follows: Figure 3 The descriptions are similar, so I will not repeat them here.

[0084] The beam splitter 580 is used to split the third signal light to obtain the eighth signal light. The beam splitter 580 is a passive optical device, also known as a passive optical splitter (POS), and can be in the form of a planar waveguide, etc. The beam splitter 580 can be housed in the same device as the second multiplexer 530, or the beam splitter 580 and the second multiplexer 530 can be housed in different devices, with an optical connection between them (e.g., via optical fiber), depending on the specific circumstances. The beam splitter 580 can split the third signal light proportionally, for example, splitting a portion of the third signal light into the eighth signal light at a ratio of 1:1 or 1:2.

[0085] The fourth fiber optic cable, 550, is used to transmit the eighth signal light.

[0086] In such Figure 5 The device shown has two output ports, which are used to transmit signal light from two transmission paths respectively.

[0087] In some implementations, the third and eighth signal lights are used to transmit data for the same service. That is, the output of the device connects to two transmission paths: one is the working path, and the other is a backup path, thus protecting the fiber optic transmission path.

[0088] In some implementations, a first optical amplifier 560 is provided in the first optical fiber 540, and a third optical amplifier 570 is provided in the third optical fiber.

[0089] The above describes the device embodiments of the present application. The corresponding method embodiments are described below. The device system embodiments correspond to the method embodiments, so the parts not described in detail can be referred to each other.

[0090] Figure 6 This is a schematic diagram of an optical communication method provided in an embodiment of this application. Figure 6 As shown, the method includes steps S610-S640.

[0091] S610 performs a multiplexing process on M first signal beams to obtain N second signal beams, where M is a positive integer greater than or equal to 2 and N is a positive integer less than M.

[0092] In some implementations, the M first signal lights are obtained from the ROADM. That is, the optical communication method of this application is implemented downstream of the ROADM, so that if a failure occurs upstream of the ROADM or at the ROADM itself, the method used in this application can still function. It should be understood that "obtained from the ROADM" in this application does not limit the direct acquisition from the ROADM; the M first signal lights can also be obtained from other optical devices after transmission from the ROADM. The M first signal lights may include one or more service lights, determined according to the actual situation.

[0093] S620, adjust the power of N second signal lights so that the power of the N adjusted second signal lights meets the first condition.

[0094] In some implementations, the power of the N adjusted second signal lights satisfies a first condition, including that the power of any one of the N adjusted second signal lights is within the power range of normal operation. Therefore, by adjusting the power after combining the first signal lights, spectral tilt is avoided.

[0095] In some implementations, M is greater than or equal to 16 and less than or equal to 128; N is greater than or equal to 2 and less than or equal to 8; and L is greater than or equal to 2 and less than or equal to 8. Specifically, M can take values ​​of 20, 32, or 64; N can take values ​​of 2, 4, or 8; and L can take values ​​of 2, 4, or 8. That is, the optical communication device of this application performs two-way multiplexing under these specific conditions, thereby avoiding the cumulative effect of wavelength correlation of the SRS effect on the optical multiplexing section layer and improving the security and stability of signal optical transmission.

[0096] In some implementations, the N second signal beams belong to the same wavelength band, which can be either the C-band or the L-band. The specific wavelength range of the C-band is 1530nm to 1565nm. The specific wavelength range of the L-band is 1565nm to 1625nm. The C-band and L-band are risk bands that easily lead to SRS effects. When the N second signal beams belong to the C-band, they can be denoted as C1, C2, ..., CN. Similarly, when the N second signal beams belong to the L-band, they can be denoted as L1, L2, ..., LN.

[0097] S630 performs a multiplexing process on L of the N adjusted second signal lights to obtain a third signal light, where L is a positive integer less than or equal to N.

[0098] S640 transmits the third signal light.

[0099] In such Figure 6 The method described above first combines different signal lights according to their wavelengths, then adjusts the power, and then combines them again for transmission, thereby ensuring a constant output power of the signal lights. This ensures that if any one wavelength of the service light among the M first signal lights fails, it will not cause a significant drop in the power of the other wavelengths, avoiding the cumulative effect of wavelength dependence of the SRS effect on the optical multiplex section (OMS), and improving the security and stability of signal light transmission. Furthermore, compared to existing technologies that fill the upstream or ROADM with dummy light, the solution in this application has lower requirements for the optical power detection and adjustment devices, and the power adjustment speed is faster, resulting in a smaller impact from the SRS effect.

[0100] Figure 7 This is a schematic diagram of another communication method provided in an embodiment of this application, such as... Figure 7 The method shown can be used with Figure 6 The methods shown are used in combination. For example... Figure 7 As shown, the method includes steps S710-S740.

[0101] S710 performs multiplexing on H fourth signal beams to obtain K fifth signal beams, where H is a positive integer greater than or equal to 2 and K is a positive integer less than H.

[0102] S720 adjusts the power of K fifth signal lights so that the power of the K adjusted fifth signal lights meets the second condition.

[0103] S730 performs a multiplexing process on Q of the K adjusted fifth signal lights to obtain a sixth signal light, where Q is a positive integer less than K.

[0104] S740, transmitting the sixth signal light.

[0105] In such Figure 7 The method shown can realize multi-port scheduling of signal light and fiber optic transmission.

[0106] In some implementations, the aforementioned N second signal beams belong to the first band, and the K fifth signal beams belong to the second band. The first and second bands are either the C-band or the L-band, respectively. For example, if the N second signal beams belong to the C-band and the K fifth signal beams belong to the L-band, the N second signal beams can be denoted as C1, C2, ..., C... N The K fifth signal lights can be denoted as L1, L2, ..., L K This allows for the separate modulation of the signal light in the two high-risk wavelength bands, further preventing coupling between the wavelengths of different service light sources.

[0107] In some implementations, such as Figure 7 The method also includes: combining the third and sixth signal lights to obtain the seventh signal light; and transmitting the seventh signal light. That is, after adjusting the power of the service lights in the two bands respectively, they are combined and transmitted together through optical fiber.

[0108] Figure 8 This is a schematic diagram of another communication method provided in an embodiment of this application, such as... Figure 8 The method shown can be used with Figure 6 The methods shown are used in combination. For example... Figure 8 As shown, the method includes steps S810-S820.

[0109] S810 splits the third signal light to obtain the eighth signal light.

[0110] S820, transmitting the eighth signal light.

[0111] In such Figure 8 The method shown allows signal light to be transmitted through two transmission paths.

[0112] In some implementations, the split third signal light and the eighth signal light are used to transmit data for the same service. That is, the third signal light and the eighth signal light are transmitted through two separate transmission paths, one as the working path and the other as a backup path, thereby protecting the fiber optic transmission path.

[0113] Those skilled in the art will recognize that the units and algorithm steps of the various examples 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 implementation should not be considered beyond the scope of this application.

[0114] Furthermore, embodiments of this application provide an optical communication system, which includes, as follows: Figure 2 , 4 The optical communication device described in 5.

[0115] Figure 9 This is a schematic diagram of an optical communication system provided in an embodiment of this application.

[0116] like Figure 9 As shown in (a), an optical communication system may include, for example, Figure 2 , 4 The optical communication device 910 and optical receiving unit 920 described in section 5 are also described. The optical receiving unit 920 is used to receive a third signal light and process the third signal light to obtain service data within the third signal light. Specifically, the optical receiving unit 910 may include a wavelength demultiplexer, an optical receiver, etc. The wavelength demultiplexer is used to perform wavelength demultiplexing on the third signal light to obtain one or more service lights within the third signal light, and the optical receiver is used to process the one or more service lights to obtain data from the one or more service lights.

[0117] In addition, such as Figure 9 As shown in (b), the optical communication system may also include a ROADM 930, which is used to transmit the M first signal beams. The specific functions of the ROADM 930 have been combined with... Figure 1 The explanation has already been provided, so I will not repeat it here.

[0118] 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.

[0119] 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.

[0120] The units described as separate unit components may or may not be physically separate. The unit 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. Depending on actual needs, some units or all units can be selected to achieve the purpose of this embodiment.

[0121] 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.

[0122] 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 unit component that contributes to the prior art, or the unit component 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, a server unit, or a network device, etc.) to execute all or partial 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.

[0123] 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, It includes a first multiplexer, N first adjustment devices, a second multiplexer, and a first optical fiber, wherein: The first combiner is used to perform multiplexing processing on M first signal beams to obtain N second signal beams, where M is a positive integer greater than or equal to 2 and N is a positive integer less than M; The N first adjustment devices correspond one-to-one with the N second signal lights. The first adjustment device among the N first adjustment devices is used to adjust the power of the corresponding second signal light so that the power of the N adjusted second signal lights meets the first condition. The second combiner is used to combine L of the N adjusted second signal lights to obtain a third signal light, where L is a positive integer less than or equal to N. The first optical fiber is used to transmit the third signal light.

2. The apparatus according to claim 1, characterized in that, The power of the N adjusted second signal lights satisfies the first condition, including: The power of any one of the N adjusted second signal lights is within the power range of normal operation.

3. The apparatus according to claim 1 or 2, characterized in that, The M first signal beams are obtained from an optical add-drop multiplexer.

4. The apparatus according to any one of claims 1 to 3, characterized in that, It also includes K second adjustment devices, a third combiner, and a second optical fiber, wherein: The first combiner is also used to perform multiplexing processing on H fourth signal beams to obtain K fifth signal beams, where H is a positive integer greater than or equal to 2 and K is a positive integer less than H; The K second adjustment devices are used to adjust the power of the K fifth signal lights so that the power of the K adjusted fifth signal lights meets the second condition; The third combiner is used to combine Q of the K adjusted fifth signal beams to obtain a sixth signal beam, where Q is a positive integer less than K. The second optical fiber is used to transmit the sixth signal light.

5. The apparatus according to claim 4, characterized in that, The M first signal beams belong to the first band, and the H fourth signal beams belong to the second band. The first band and the second band are different.

6. The apparatus according to claim 5, characterized in that, The first optical fiber is provided with a first optical amplifier, which is used to amplify the signal light of the first band. The second optical fiber is provided with a second optical amplifier, which is used to amplify the signal light of the second band.

7. The apparatus according to any one of claims 4 to 6, characterized in that, It also includes a fourth multiplexer and a third optical fiber, wherein: The fourth combiner is used to combine the third signal light and the sixth signal light to obtain the seventh signal light; The third optical fiber is used to transmit the seventh signal light.

8. The apparatus according to any one of claims 1 to 3, characterized in that, It also includes a splitter and a fourth fiber, wherein: The beam splitter is used to split the third signal light to obtain the eighth signal light; The fourth optical fiber is used to transmit the eighth signal light.

9. The apparatus according to claim 8, characterized in that, The third signal light and the eighth signal light are used to transmit data for the same service.

10. The apparatus according to any one of claims 1 to 9, characterized in that, in: M is greater than or equal to 16 and less than or equal to 128; The N is greater than or equal to 2 and less than or equal to 8; The L is greater than or equal to 2 and less than or equal to 8.

11. An optical communication method, characterized in that, include: M first signal beams are combined to obtain N second signal beams, where M is a positive integer greater than or equal to 2 and N is a positive integer less than M; The power of the N second signal lights is adjusted so that the power of the N adjusted second signal lights meets the first condition; The L adjusted second signal lights out of the N adjusted second signal lights are subjected to wave combining to obtain the third signal light, where L is a positive integer less than or equal to N; Transmit the third signal light.

12. An optical transmission system, characterized in that, The device includes an optical receiving unit and an optical communication apparatus as described in any one of claims 1 to 10, wherein the optical receiving unit is used to receive the third signal light.

13. The system according to claim 12, characterized in that, It also includes an optical add-drop multiplexer, which is used to transmit the M first signal beams.

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