Filling wave protection device, filling wave light source single board, communication station and communication networking

Abstract

The embodiment of the present application provides a kind of filling wave protection device, filling wave light source single board, communication site and communication networking, including coupler module and multiple filling wave light sources, each filling wave light source is used to send filling wave, coupler module is connected with multiple filling wave light sources to receive filling wave, coupler module is provided with multiple output ends, and different output ends are used to be connected to different outbound ends in optical add-drop multiplexer.The embodiment of the present application can be coupled by coupler after multiple filling wave light sources are coupled, and multiple directions of optical add-drop multiplexer are given by different output ends of coupler, i.e.multiple directions of filling wave light source are mutually protected, in the case where one or more filling wave light sources are abnormal or do not work, and other direction filling wave light source normal work, filling wave light source in system will not all be lost, but only power is reduced, therefore, the embodiment of the present application can still guarantee the stability of system performance.

Description

Technical Field

[0001] This application relates to the field of optical transmission network communication, and in particular to a filled wave protection device, a filled wave light source board, a communication site, and a communication network. Background Technology

[0002] In related technologies, for channel-spread systems, due to the wider spectrum they occupy, there is a strong SRS (Stimulated Raman Scattering) effect. This results in a significant transfer of optical power from short wavelengths to long wavelengths. Furthermore, the SRS transfer has a cumulative effect; after multiple transmission segments, the power transfer at short wavelengths is significant. This leads to the optical power and OSNR (Optical Signal-to-Noise Ratio) flatness at the receiver failing to meet the requirements of the system application. Additionally, dynamic wavelength addition and subtraction in channel-spread systems require dynamic control of the wavelength power within the system. The control algorithm is complex and the adjustment is time-consuming.

[0003] In response, the common practice in current channel extension systems is to use filler waves to keep the system fully configured at all times. After the system is stabilized during the initial setup phase, the power equalization and control are achieved by alternating between real and sham waves. This allows the system to quickly stabilize even with dynamic wavelength additions and subtractions, while also avoiding the impact of dynamic additions and subtractions on the performance of services on existing channels.

[0004] However, when some filler wave light sources malfunction or fail to work, it may cause service disruptions in certain wavebands, thus affecting system performance. Summary of the Invention

[0005] This application provides a filling wave protection device, a filling wave light source board, a communication station, and a communication network, aiming to reduce the impact on system performance when the filling wave light source malfunctions.

[0006] In a first aspect, embodiments of this application provide a filling wave protection device, comprising:

[0007] Multiple fill wave sources, each of which is used to transmit a fill wave;

[0008] A coupler module is connected to multiple filling wave light sources to receive the filling wave. The coupler module is provided with multiple output terminals, and different output terminals are used to connect to different output terminals in an optical add-drop multiplexer.

[0009] Secondly, embodiments of this application provide a filling wave light source board, which is equipped with the filling wave protection device described in the first aspect.

[0010] Thirdly, embodiments of this application provide a communication station, including an optical add-drop multiplexer and the fill wave protection device described in the first aspect above. The output terminal of the fill wave protection device is connected to the output terminal of the optical add-drop multiplexer, and the output terminal and the output terminal correspond one-to-one.

[0011] Fourthly, embodiments of this application provide a communication network including multiple communication stations as described in the second aspect above, wherein the multiple communication stations are connected to each other.

[0012] The filling wave protection device, filling wave source board, communication station, and communication network provided in this application include multiple filling wave sources and coupler modules. Each filling wave source is used to transmit a filling wave. The coupler module is connected to multiple filling wave sources to receive filling waves. The coupler module has multiple output terminals, and different output terminals are used to connect to different output terminals in the optical add-drop multiplexer. Since the multiple filling wave sources are coupled together through the coupler module, and the different output terminals of the coupler module are connected to different output terminals in the optical add-drop multiplexer, this application embodiment can couple multiple filling wave sources through the coupler and provide them to multiple directions of the optical add-drop multiplexer through different output terminals of the coupler. That is, the filling wave sources in multiple directions protect each other. If one or more filling wave sources malfunction or fail to work, and the filling wave sources in other directions work normally, the filling wave sources in the system will not be completely lost, but only the power will be reduced. Therefore, this application embodiment can still ensure the stability of system performance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of significant broadband SRS power transfer provided in an embodiment of this application;

[0014] Figure 2 This is a schematic diagram of a ring network structure of a ROADM provided in one embodiment of this application;

[0015] Figure 3 This is a schematic diagram of a link in a ring network provided in an embodiment of this application;

[0016] Figure 4 This is a schematic diagram of the structure of a filling wave protection device provided in one embodiment of this application;

[0017] Figure 5 This is a schematic diagram of a filling wave protection device provided in one embodiment of this application applied in a ROADM network;

[0018] Figure 6 This is a schematic diagram of a filling wave protection device provided in another embodiment of this application applied in a ROADM network;

[0019] Figure 7 This is a schematic diagram of a filling wave protection device provided in one embodiment of this application applied in a FOADM network;

[0020] Figure 8 This is a schematic diagram of a filling wave protection device provided in another embodiment of this application applied in a FOADM network;

[0021] Figure 9 This is a schematic diagram of the structure of a filled wave protection device with a multi-stage coupler unit provided in one embodiment of this application;

[0022] Figure 10 This is a schematic diagram of the structure of two filled wave light sources coupled to a station in two directions according to an embodiment of this application;

[0023] Figure 11 This is a schematic diagram of the structure of four filled wave light sources provided by an embodiment of this application, which are coupled through couplers and delivered to the station in four directions;

[0024] Figure 12 This is a schematic diagram of the structure of four filled wave light sources coupled to a station in eight directions according to one embodiment of this application;

[0025] Figure 13 This is a schematic diagram of the structure of a filling wave protection device provided in one embodiment of this application applied to a communication site. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0027] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0028] In this application, the terms "furthermore," "exemplarily," or "optionally" are used as examples, illustrations, or descriptions and should not be construed as being more preferred or advantageous than other embodiments or designs. The use of terms such as "furthermore," "exemplarily," or "optionally" is intended to present the relevant concepts in a specific manner.

[0029] Among related technologies, band extension technology builds upon DWDM (Dense Wavelength Division Multiplexing) technology by further expanding the available transmission bandwidth beyond the traditional C-band. This is achieved by increasing the number of multiplexed channels in the optical fiber to enhance system transmission capacity. Since the commercialization of DWDM technology, long-distance optical transmission systems have primarily used the traditional C-band, approximately 4THz, corresponding to the low loss of optical fibers and the efficient amplification window of EDFA (Erbium Doped Fiber Amplifier). Later commercial systems extended the wavelength range of EDFA and ITLA (Integrable Tunable Laser Assembly) to the CE band, approximately 4.8THz, supporting 96 50GHz channels. Building upon this, in recent years, Chinese equipment manufacturers and operators have spearheaded the extension of the Super C-band, further increasing the C-band bandwidth to 6THz, and implementing a 200G QPSK (Quadrature Phase Shift Keying) scheme with 80 waves and 75GHz spacing. In some foreign regions, due to the deployment of G653 DSF (Dispersion Shifted Fiber), C-band WDM (Wavelength Division Multiplexing) transmission was significantly affected by four-wave mixing, leading to the earlier commercialization of the L-band. Currently, a small number of foreign operators and internet companies are also deploying C+L-band systems, expecting to double the capacity per fiber. However, the main solution abroad is C96+L96, which is significantly different from the situation in China. Firstly, major domestic operators have already deployed 200G systems on a large scale in the C120 band, and hope to expand the L-band capacity simultaneously based on the C120 band in the future. Secondly, domestic operators generally hope that long-distance transmission systems will provide at least 80 wavelengths of transmission capability, evolving from the early 50GHz spacing of 80ch*32Gbd 100Gbps QPSK, to the current 75GHz spacing of 80ch*64Gbd 200G QPSK, and further to the future 150GHz spacing of 80ch*128Gbd 400G QPSK. Accompanying this demand for long-distance 400G system wavelengths, the L-band bandwidth also needs to be expanded to 6THz. Regarding the commercialization of band extension technology, domestic equipment manufacturers and operators are actively promoting the upgrade from C120 to C120+L120, aiming to provide single-fiber 80ch*400G QPSK long-distance transmission capability.Currently, the main advancements in the C+L related industry chain include DWDM, DSF, EDFA, ITLA, OA (Optical Amplifier), OSNR (Optical signal-to-noise ratio), QPSK, ROADM (Reconfigurable Optical Add / Drop Multiplexer), and SRS (Stimulated Raman Scattering). The supply chain progress is in line with expectations. With the increasing maturity of single-wavelength 400G long-distance optical module technology, the commercialization of extended C+L band optical systems is expected.

[0030] Because traditional C-band services occupy a small spectral width, power transfer caused by SRS is generally ignored. However, in channel-extended systems, such as C+L band, which occupy a wider spectral width (12 THz), a strong SRS effect exists, resulting in a very significant transfer of optical power from short wavelengths to long wavelengths (i.e., power transfer from the C-band to the L-band). Figure 1 As shown. Furthermore, SRS transfer has a cumulative effect; after multiple transmission segments, power transfer at short wavelengths becomes significant, making it difficult for the optical power and OSNR flatness at the receiver to meet the requirements of system applications. The problem of short-wavelength power transfer to long-wavelengths caused by the SRS effect in the fiber cannot be ignored in channel-extended systems. In addition, if dynamic wavelength add / drop in a C+L system is considered, dynamic control of the wavelength power in the system is also required, which involves complex control algorithms and time-consuming adjustments.

[0031] In response, the industry practice in current channel extension systems is to use filler waveforms to keep the system fully configured at all times. After stabilizing the system during the initial setup phase, a "real waveform / sham waveform alternation" approach is used for power balancing and control in actual operation. This allows the system to quickly stabilize even with dynamic wavelength additions and subtractions, while also avoiding the impact of dynamic waveform additions and subtractions on the performance of existing channel services. Figure 2 and Figure 3 As shown, the C+L system is used as an example for explanation, where... Figure 2 This represents a ring network structure of a ROADM. Figure 3 It is a link in a ring network, such as the link between a and b. In the C+L system, it is used to facilitate the management of service signals. Generally speaking, the filling wave does not pass through the ROADM site. Each ROADM site and each direction reuses the filling wave source to fill the channel.

[0032] While using a filler wave method can make the channel extension system more stable, it also presents a problem. Taking an extended C+L system as an example, consider a scenario where the C-band is entirely filled with filler waves and the L-band contains the actual service signal. If the dummy wave source in the C-band malfunctions or stops working, all the dummy wave sources in the C-band will be lost. The power of the L-band service signal will decrease with each additional segment, eventually causing the L-band service to become unavailable after several segments. In other words, if the filler wave source in the C-band is not working, it will affect the L-band service light, resulting in a disruption in the service.

[0033] Based on this, this application provides a filling wave protection device, a filling wave light source board, a communication station, and a communication network. It utilizes a coupler to couple the filling wave light sources in multiple directions of the station, and the filling wave light sources in multiple directions protect each other. In this way, when the filling wave light source in one direction does not work or works abnormally, while the filling wave light sources in other directions work normally, the impact of filling wave drop on system performance can be reduced, and the system performance in each direction can be kept stable.

[0034] The technical solutions of this application can be applied to various communication systems, such as WCDMA (Wideband Code Division Multiple Access), E-UTRAN (Evolved Universal Terrestrial Radio Access Network), NG-RAN (Next Generation Radio Access Network), LTE (Long Term Evolution), WiMAX (Worldwide Interoperability for Microwave Access), 5G (5th Generation), NR (new radio access technology), and future communication systems such as 6G.

[0035] The technical solutions of this application can be applied to various communication technologies, such as microwave communication, optical communication, and millimeter-wave communication. This application does not limit the specific technologies or equipment used.

[0036] Based on the communication system of any of the above embodiments, various embodiments of the charging wave protection device of this application are presented below.

[0037] like Figure 4 As shown, Figure 4This is a schematic diagram of the structure of a filling wave protection device 100 provided in one embodiment of this application.

[0038] In one embodiment, the fill wave protection device 100 of this application includes, but is not limited to, a plurality of fill wave light sources and a coupler module 130, wherein each fill wave light source is used to transmit fill waves, and the coupler module 130 is connected to the plurality of fill wave light sources to receive fill waves. The coupler module 130 is provided with a plurality of output terminals 131, and different output terminals 131 are used to connect to different outgoing terminals in the optical add-drop multiplexer.

[0039] Since multiple filler wave sources are coupled together through coupler module 130, and different output terminals 131 of coupler module 130 are connected to different output terminals in optical add-drop multiplexer, this embodiment of the application can couple multiple filler wave sources through couplers and provide them to multiple directions of optical add-drop multiplexer through different output terminals 131 of couplers. That is, the filler wave sources in multiple directions protect each other. If one or more filler wave sources work abnormally or do not work, and the filler wave sources in other directions work normally, the filler wave sources in the system will not be completely lost, but only the power will be reduced. Therefore, this embodiment of the application can still ensure the stability of system performance.

[0040] In one embodiment, the fill wave light source of this application can generate a fill wave. By inputting the fill wave into the system, the system can always be kept in a fully configured state, thereby adjusting the system to a stable state. The fill wave can be considered a dummy wave, while the system's service signal is the real wave. In operation, a "real wave / dummy wave substitution" approach is used for power equalization and control. This ensures that even with dynamic wavelength uplinks and downlinks, the system can quickly reach stability, while avoiding the impact of dynamic wavelength uplinks and downlinks on the service performance of existing channels.

[0041] In one embodiment, the number of filling wave light sources in this application embodiment can be two, three, or more. This application embodiment does not specifically limit the number of filling wave light sources.

[0042] In one embodiment, the coupler module 130 of this application embodiment can couple all the fill wave light sources, thereby obtaining all the fill waves sent by all the fill wave light sources, and then distribute all the fill waves to multiple directions of the optical add-drop multiplexer, so that the fill wave light sources in multiple directions can protect each other.

[0043] In one embodiment, the allocation method of the fill wave of the coupler module 130 can be as follows: all fill waves can be evenly distributed to multiple directions of the optical add-drop multiplexer; alternatively, the allocation can be based on the different demand amounts corresponding to each direction. For example, if the demand for fill waves is higher in the first direction and lower in the second direction, then in this embodiment, the coupler module 130 can allocate more fill waves to the first direction and less fill waves to the second direction. Alternatively, the allocation can be based on a preset ratio of the demand amounts corresponding to each direction. For example, if the demand for fill waves in the first direction is twice that in the second direction, then in this embodiment, the coupler module 130 can allocate two-thirds of the fill waves to the first direction and one-third to the second direction. Other allocation methods are also possible; this embodiment does not specifically limit the allocation method of the fill wave of the coupler module 130.

[0044] In one embodiment, the number of couplers included in the coupler module 130 of this application embodiment can be one, four, or more. This application embodiment does not specifically limit the number of couplers included in the coupler module 130.

[0045] In one embodiment, such as Figure 4 As shown, the filling wave protection device 100 in this embodiment of the application also includes, but is not limited to, a plurality of optical amplifiers 120, each optical amplifier 120 corresponding to a filling wave light source, and the optical amplifier 120 being disposed between the corresponding filling wave light source and the coupler module 130.

[0046] In one embodiment, for each fill wave light source, at least one optical amplifier 120 is provided. Since the amplitude of the fill wave generated by the fill wave light source is small and difficult to meet the system requirements, the optical amplifier 120 is used to amplify the fill wave generated by the fill wave light source in this embodiment.

[0047] In one embodiment, for each fill wave light source, this application embodiment may provide one optical amplifier 120, two optical amplifiers 120, three optical amplifiers 120, or more optical amplifiers 120. This application embodiment does not specifically limit the number of optical amplifiers 120.

[0048] In one embodiment, when a fill wave light source is provided with one optical amplifier 120, the fill wave generated by the fill wave light source can be amplified in the first stage; when a fill wave light source is provided with two optical amplifiers 120, the fill wave generated by the fill wave light source can be amplified in the second stage; when a fill wave light source is provided with three optical amplifiers 120, the fill wave generated by the fill wave light source can be amplified in the third stage.

[0049] In one embodiment, the optical amplifier 120 is a subsystem product in an optical fiber communication system that can amplify optical signals. Its principle is basically based on stimulated emission of laser light, which achieves amplification by converting the energy of pump light into the energy of signal light.

[0050] In one embodiment, the type of optical amplifier 120 in this application embodiment can be a semiconductor amplifier, an optical fiber amplifier, or other types of amplifiers. This application embodiment does not specifically limit the type of optical amplifier 120.

[0051] In one embodiment, the optical add-drop multiplexer of this application may include one of the following: a reconfigurable optical add-drop multiplexer 200 and a fixed optical add-drop multiplexer 300. The reconfigurable optical add-drop multiplexer 200 is a device or equipment used in dense wavelength division multiplexing (DWDM) systems. Its function is to dynamically add or remove service wavelengths through remote reconfiguration; that is, wavelengths for adding or removing services can be arbitrarily assigned as needed in the middle of the line, achieving flexible service scheduling. The fixed optical add-drop multiplexer 300, on the other hand, can only add and remove channels with fixed wavelengths, and its settings cannot be dynamically adjusted as as with the reconfigurable optical add-drop multiplexer 200.

[0052] In addition, such as Figures 5 to 8 As shown, Figure 5 This is a schematic diagram of a filling wave protection device provided in one embodiment of this application applied in a ROADM network. Figure 6 This is a schematic diagram of a filling wave protection device provided in another embodiment of this application applied in a ROADM network. Figure 7 This is a schematic diagram illustrating the application of a fill wave protection device provided in one embodiment of this application in a FOADM (Fixed Optical Add / Drop Multiplexer) network. Figure 8 This is a schematic diagram of the filling wave protection device 100 provided in another embodiment of this application applied in a FOADM network.

[0053] In one embodiment, such as Figure 5 and Figure 7As shown, the output end of the optical add-drop multiplexer in this embodiment of the application is provided with a wavelength selection switch 210, and the output end 131 of the coupler module 130 is connected to the input side of the wavelength selection switch 210.

[0054] Specifically, such as Figure 5 As shown, in the case of ROADM networking, this embodiment of the application can add a fill wave by filling the tributary. That is, the fill wave is injected into the input side of the wavelength selection switch 210 at the outgoing end of the reconfigurable optical add-drop multiplexer 200 by the fill wave protection device 100. Then the wavelength selection switch 210 will schedule the wavelength, and pass and output the service signal and the fill wave of the specified wavelength.

[0055] In addition, such as Figure 7 As shown, in the case of FOADM networking, this embodiment of the application can add a fill wave by filling the branch point. That is, the fill wave is injected into the input side of the wavelength selection switch 210 at the outgoing end of the fixed optical add-drop multiplexer 300 by the fill wave protection device 100. Then the wavelength selection switch 210 will schedule the wavelength, and pass and output the service signal and the fill wave of the specified wavelength.

[0056] In one embodiment, such as Figure 6 and Figure 8 As shown, the output end of the optical add-drop multiplexer in this embodiment of the application is provided with a wavelength selection switch 210, and the output end 131 of the coupler module 130 is connected to the output side of the wavelength selection switch 210.

[0057] Specifically, such as Figure 6 As shown, in the case of ROADM networking, this embodiment of the application can add a fill wave by filling the group intersection. That is, the fill wave protection device 100 adds a fill wave on the output side of the wavelength selection switch 210 at the outgoing end of the reconfigurable optical add-drop multiplexer 200. Then the wavelength selection switch 210 will schedule the wavelength, pass the service signal of the specified wavelength, and output it together with the fill wave generated by the fill wave protection device 100.

[0058] Specifically, such as Figure 8 As shown, in the case of FOADM networking, this embodiment of the application can add a fill wave by filling the group intersection. That is, the fill wave protection device 100 adds a fill wave on the output side of the wavelength selection switch 210 at the outgoing end of the fixed optical add-drop multiplexer 300. Then the wavelength selection switch 210 will schedule the wavelength, pass the service signal of the specified wavelength, and output it together with the fill wave generated by the fill wave protection device 100.

[0059] In addition, such as Figure 9 As shown, Figure 9This is a schematic diagram of the structure of a filled wave protection device 100 with a multi-stage coupler unit 132 provided in one embodiment of this application.

[0060] In one embodiment, the coupler module 130 includes multiple levels of coupler units 132, each level of coupler unit 132 including multiple couplers 133, and each coupler 133 in the previous level coupler unit 132 is connected to each coupler 133 in the next level coupler unit 132.

[0061] In one embodiment, when there are multiple coupler units 132, each coupler 133 in the previous coupler unit 132 can send the received filler wave to each coupler 133 in the next coupler unit 132, thereby allowing more output terminals 131 to be set in the last coupler unit 132 to connect to more outgoing terminals in the optical add-drop multiplexer.

[0062] Based on the above Figures 4 to 9 The filling wave protection device of the embodiment shown below is proposed as follows: Figures 10 to 12 Several specific embodiments of the filling wave protection device shown in this application are illustrated.

[0063] This application provides a filling wave protection device in a channel extension system. Before implementing this scheme, it ensures that the power of the filling wave after optical power coupling can meet the power requirements of the ROADM site in all directions. Based on the saturated output power of the filling wave source and the number of multiplexed paths at the ROADM site, the device can provide power to the ROADM site in two directions after coupling two dummy sources; it can also provide power to the ROADM site in four directions after coupling two dummy sources; or it can provide power to the ROADM site in eight directions after coupling four dummy sources, etc. This application only describes these scenarios, but the device is not limited to these specific scenarios.

[0064] The technical methods in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The following description is only a portion of preferred embodiments of this application, but does not limit the application. Those skilled in the art can make flexible modifications and variations. Similar embodiments obtained by those skilled in the art without inventive research are all within the scope of protection of this application.

[0065] like Figure 10 As shown, Figure 10 This is a schematic diagram of the structure of two filled wave light sources provided by an embodiment of this application, which are coupled by a coupler and delivered to the station in two directions.

[0066] In one embodiment, two filled-wave light sources are coupled together via couplers to protect each other and are supplied to two directions at each ROADM site. The directions of each pair of ROADM sites are configured as follows: Figure 10 The system features a structure where the fill wave sources in each pair of directions mutually protect each other. If one fill wave source malfunctions, the power of all fill waves in the system decreases by 3dB. Compared to scenarios where all fill waves are lost without protection, the system is more stable.

[0067] In addition, such as Figure 11 As shown, Figure 11 This is a schematic diagram of the structure of four filled wave light sources provided by an embodiment of this application, which are coupled by couplers and delivered to the station in four directions.

[0068] In one embodiment, four filled-wave light sources are coupled together via couplers to protect each other and supply power to four directions of the ROADM station. Each group of four ROADM station directions employs the following method: Figure 11 The structure features four filler wave sources that protect each other. If one filler wave source malfunctions, the power of the filler waves in the system will decrease by 1.2 dB.

[0069] In addition, such as Figure 12 As shown, Figure 12 This is a schematic diagram of the structure of four filled wave light sources provided by an embodiment of this application, coupled by a coupler, and delivered to the station in eight directions.

[0070] In one embodiment, four filled-wave light sources are coupled together via couplers to protect each other and supply power to eight directions of the ROADM station. Each set of eight ROADM station directions employs the following method: Figure 12 The structure features eight fill wave sources that protect each other. If one fill wave source malfunctions, the power of the fill waves in the system will decrease by 0.58 dB.

[0071] According to the technical solution of this application embodiment, in a channel extension system, such as a C+L system, a fill wave is used to keep the system in a fully configured state. When the fill wave light source malfunctions, the SRS effect can affect existing services, even causing interruptions. Therefore, this application embodiment addresses this problem by proposing a fill wave light source coupler protection method. Multiple fill wave light sources are coupled through couplers and mutually protect each other. This ensures that when a single dummy light source malfunctions, all fill wave light sources in the system will not fail, but only their power will decrease, thus suppressing the impact of abnormal fill wave light source operation on system performance in the C+L system.

[0072] Based on the filling wave protection device of any of the above embodiments, the following are various embodiments of the filling wave light source board, communication station and communication network of this application.

[0073] In addition, one embodiment of this application provides a filling wave light source board, which includes, but is not limited to, the filling wave protection device described in the above embodiments.

[0074] According to the technical solution of the filled wave light source board in the embodiments of this application, since multiple filled wave light sources are coupled and connected through a coupler module, and different output terminals of the coupler module are connected to different output terminals in the optical add-drop multiplexer, the embodiments of this application can couple multiple filled wave light sources through the coupler and provide them to multiple directions of the optical add-drop multiplexer through different output terminals of the coupler. That is, the filled wave light sources in multiple directions protect each other. If one or more filled wave light sources work abnormally or do not work, and the filled wave light sources in other directions work normally, the filled wave light sources in the system will not be completely lost, but only the power will be reduced. Therefore, the embodiments of this application can still ensure the stability of system performance.

[0075] It is worth noting that since the filling wave light source board of this application embodiment includes the filling wave protection device of the above embodiment, the specific implementation method and technical effect of the filling wave light source board of this application embodiment can refer to the specific implementation method and technical effect of the filling wave protection device of any of the above embodiments.

[0076] In addition, one embodiment of this application provides a communication station, which includes, but is not limited to, an optical add-drop multiplexer and a fill wave protection device as described above. The output terminal of the fill wave protection device is connected to the output terminal of the optical add-drop multiplexer, and the output terminal and the output terminal correspond one-to-one.

[0077] like Figure 13 As shown, Figure 13 This is a schematic diagram of the structure of a filling wave protection device provided in one embodiment of this application applied to a communication site.

[0078] In one embodiment, the outgoing station is provided with a first wavelength selection switch 211 and a second wavelength selection switch 212. The first wavelength selection switch 211 is used to pass optical signals of a first wavelength, and the second wavelength selection switch 212 is used to pass optical signals of a second wavelength.

[0079] In one embodiment, for a C+L system, the first wavelength selection switch 211 can be used to pass C-band optical signals, and the second wavelength selection switch 212 can be used to pass L-band optical signals. Besides being able to pass C-band and L-band optical signals respectively, the first wavelength selection switch 211 and the second wavelength selection switch 212 in this embodiment can also pass optical signals from two other different wavelength bands. This embodiment does not specifically limit the wavelength band signals specified by the first wavelength selection switch 211 and the second wavelength selection switch 212.

[0080] In one embodiment, the filling wave protection device includes, but is not limited to, the following implementations, respectively:

[0081] The first implementation: The filling wave protection device includes a first filling wave protection device 410, which is used to generate a filling wave of a first wavelength. The output terminal of the first filling wave protection device 410 is connected to the input side or the output side of the first wavelength selection switch 211.

[0082] In one embodiment, for a C+L system, if the C-band service signal is not fully loaded but the L-band service signal is fully loaded, this embodiment of the application may select only the first fill wave protection device 410 to generate the C-band fill wave, so that the C-band is also in a fully loaded state at the same time.

[0083] The second implementation: The filling wave protection device includes a second filling wave protection device 420, which is used to generate a filling wave of a second wavelength. The output terminal of the second filling wave protection device 420 is connected to the input side or the output side of the second wavelength selection switch 212.

[0084] In one embodiment, for a C+L system, if the C-band service signal is fully loaded but the L-band service signal is not fully loaded, this embodiment of the application may select only the second filler wave protection device 420 to generate the L-band filler wave, so that the L-band is also in a fully loaded state at the same time.

[0085] The third implementation: The filling wave protection device includes a first filling wave protection device 410 and a second filling wave protection device 420. The first filling wave protection device 410 is used to generate a filling wave of a first wavelength, and the second filling wave protection device 420 is used to generate a filling wave of a second wavelength. The output terminal of the first filling wave protection device 410 is connected to the input side or the output side of the first wavelength selection switch 211, and the output terminal of the second filling wave protection device 420 is connected to the input side or the output side of the second wavelength selection switch 212.

[0086] In one embodiment, for a C+L system, if the C-band service signal is not fully loaded and the L-band service signal is not fully loaded, this embodiment of the application can simultaneously select the first fill wave protection device 410 to generate the C-band fill wave and the second fill wave protection device 420 to generate the L-band fill wave, so that both the C-band and L-band are in a fully loaded state.

[0087] According to the technical solution of the communication station in the embodiments of this application, since multiple filled wave light sources are coupled and connected through a coupler module, and different output terminals of the coupler module are connected to different output terminals in the optical add-drop multiplexer, the embodiments of this application can couple multiple filled wave light sources through the coupler and provide them to multiple directions of the optical add-drop multiplexer through different output terminals of the coupler. That is, the filled wave light sources in multiple directions protect each other. If one or more filled wave light sources work abnormally or do not work, and the filled wave light sources in other directions work normally, the filled wave light sources in the system will not be completely lost, but only the power will be reduced. Therefore, the embodiments of this application can still ensure the stability of system performance.

[0088] It is worth noting that since the communication station of this application embodiment includes the filling wave protection device of the above embodiments, the specific implementation method and technical effect of the communication station of this application embodiment can refer to the specific implementation method and technical effect of the filling wave protection device of any of the above embodiments.

[0089] In addition, one embodiment of this application provides a communication network, which includes, but is not limited to, multiple communication stations described in the above embodiments, wherein the multiple communication stations are connected to each other.

[0090] In one embodiment, the communication network also includes, but is not limited to, an optical line amplifier, which is located between two communication stations.

[0091] In one embodiment, optical fibers are used for communication connections between the communication station and the optical line amplifier, as well as between the two optical line amplifiers.

[0092] According to the communication networking technical solution of the embodiments of this application, since multiple filled wave light sources are coupled and connected through coupler modules, and different output terminals of the coupler modules are connected to different output terminals in the optical add-drop multiplexer, the embodiments of this application can couple multiple filled wave light sources through couplers and provide them to multiple directions of the optical add-drop multiplexer through different output terminals of the couplers. That is, the filled wave light sources in multiple directions protect each other. If one or more filled wave light sources work abnormally or do not work, and the filled wave light sources in other directions work normally, the filled wave light sources in the system will not be completely lost, but only the power will be reduced. Therefore, the embodiments of this application can still ensure the stability of system performance.

[0093] It is worth noting that, since the communication network of this application embodiment includes the communication station of the above embodiment, and the communication station of the above embodiment includes the filling wave protection device of the above embodiment, the specific implementation method and technical effect of the communication network of this application embodiment can refer to the specific implementation method and technical effect of the filling wave protection device of any of the above embodiments.

Claims

1. A filling wave protection device, comprising: Multiple filling wave sources, each of which is used to transmit a filling wave; A coupler module is connected to multiple filling wave light sources to receive the filling waves. The coupler module is provided with multiple output terminals, and different output terminals are used to connect to different output terminals in an optical add-drop multiplexer. The coupler module is used to couple all the filling waves and distribute all the coupled filling waves to multiple output terminals.

2. The filling wave protection device according to claim 1, characterized in that, It also includes multiple optical amplifiers, each corresponding to a filling wave light source, and the optical amplifiers are disposed between the corresponding filling wave light source and the coupler module.

3. The filling wave protection device according to claim 1, characterized in that, The output end of the optical add-drop multiplexer is equipped with a wavelength selection switch, and the output end of the coupler module is connected to the input side of the wavelength selection switch.

4. The filling wave protection device according to claim 1, characterized in that, The output end of the optical add-drop multiplexer is equipped with a wavelength selection switch, and the output end of the coupler module is connected to the output side of the wavelength selection switch.

5. The filling wave protection device according to claim 1, characterized in that, The coupler module includes multiple levels of coupler units, each level of the coupler unit includes multiple couplers, and each coupler in the previous level of the coupler unit is connected to each coupler in the next level of the coupler unit.

6. The filling wave protection device according to any one of claims 1 to 5, characterized in that, The optical add-drop multiplexer includes one of the following: a reconfigurable optical add-drop multiplexer, or a fixed optical add-drop multiplexer.

7. A single board for a filled wave light source, characterized in that, The device is provided with a filling wave protection device as described in any one of claims 1 to 6.

8. A communication station, characterized in that, It includes an optical add-drop multiplexer and a fill wave protection device as described in any one of claims 1 to 6, wherein the output terminal of the fill wave protection device is connected to the outgoing terminal of the optical add-drop multiplexer, and the output terminal and the outgoing terminal correspond one-to-one.

9. The communication station according to claim 8, characterized in that, The outgoing station is equipped with a first wavelength selection switch and a second wavelength selection switch. The first wavelength selection switch is used to pass optical signals of a first wavelength, and the second wavelength selection switch is used to pass optical signals of a second wavelength.

10. The communication station according to claim 9, characterized in that, The filling wave protection device includes one of the following: A first fill wave protection device is used to generate a fill wave of a first wavelength, and the output terminal of the first fill wave protection device is connected to the input side or the output side of the first wavelength selection switch. The second fill wave protection device is used to generate a fill wave of a second wavelength. The output terminal of the second fill wave protection device is connected to the input side or the output side of the second wavelength selection switch. A first fill wave protection device and a second fill wave protection device, wherein the first fill wave protection device is used to generate a fill wave of a first wavelength, and the second fill wave protection device is used to generate a fill wave of a second wavelength, wherein the output terminal of the first fill wave protection device is connected to the input side or the output side of the first wavelength selection switch, and the output terminal of the second fill wave protection device is connected to the input side or the output side of the second wavelength selection switch.

11. A communication network, characterized in that, It includes a plurality of communication stations as described in any one of claims 8 to 10, wherein the plurality of communication stations are connected in communication.

12. The communication network according to claim 11, characterized in that, The communication network also includes an optical line amplifier, which is located between the two communication sites.

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