Method and apparatus for implementing dynamic core power allocation in multi-core fiber transmission system

Abstract

The application discloses a kind of method and device for realizing the dynamic distribution of multi-core optical fiber transmission system core power, it is related to multi-core optical fiber transmission field, the method includes based on the attenuation coefficient of each core in the multi-core optical fiber obtained by detection, before communication, as the communication terminal of communication sending end, the optical signal is sent into multi-core optical fiber by selecting the optical splitter of corresponding splitting ratio;As receiving end in the process of communication, the communication terminal receives the optical signal in multi-core optical fiber, and according to the optical signal power and signal quality of each core to judge whether multi-core optical fiber is bent;According to the result of judgment and when multi-core optical fiber is bent, as the communication terminal of receiving end in last communication, as sending end at this time, select the optical splitter of corresponding other splitting ratio, and the optical signal is sent into multi-core optical fiber.The application can effectively solve the problem of power flexible distribution between cores.

Description

Technical Field

[0001] This application relates to the field of multi-core optical fiber transmission, specifically to a method and apparatus for dynamically allocating fiber core power in a multi-core optical fiber transmission system. Background Technology

[0002] In the field of fiber optic communication, with the significant increase in communication speed and capacity demands driven by the development of current information networks, researchers, after utilizing various characteristics of light, such as frequency, phase, and polarization, to expand communication capacity, have turned their attention to spatial expansion, namely multi-core fiber optic transmission technology. Multi-core fiber optic transmission systems achieve a multiple increase in communication capacity by wrapping multiple fiber cores within a single optical cable. While multi-core fiber optic transmission is a promising solution to address the current surge in communication demand, its technical complexity and implementation difficulties still hinder its commercialization.

[0003] Multi-core fiber optic transmission systems encounter problems that do not exist in single-core fiber optic transmission systems, such as inter-core crosstalk, coupling between single-core and multi-core fibers, and fiber core power distribution. Therefore, the focus should be on solving these problems so that multi-core fiber optic transmission systems can truly and effectively expand communication system capacity. For multi-core fiber optic transmission systems, the different loss coefficients of each fiber core, power coupling differences caused by fiber bending, and laser emission can all affect the overall transmission efficiency of multi-core fiber optics. How to more rationally distribute the optical power of each fiber core is a crucial aspect of improving transmission efficiency and reducing power loss. Coupled with several single-channel signals from a single-core fiber to a multi-core fiber optic fiber, fan-in and fan-out devices are required. However, the power ratio of fan-in and fan-out devices is currently fixed in the manufacturing process. Therefore, how to solve the problem of flexible power distribution between fiber cores based on the current common multi-core fiber optic transmission system construction scheme is an urgent issue to be addressed. Summary of the Invention

[0004] This application provides a method and apparatus for dynamically allocating fiber core power in a multi-core optical fiber transmission system, which can effectively solve the problem of flexible power allocation between fiber cores.

[0005] In a first aspect, embodiments of this application provide a method for dynamically allocating fiber core power in a multi-core optical fiber transmission system, the method comprising:

[0006] Based on the attenuation coefficient of each fiber core in the multi-core optical fiber obtained by detection, the communication terminal, which is the communication transmitter, selects a splitter with the corresponding splitting ratio before the communication starts and sends the optical signal into the multi-core optical fiber.

[0007] During the communication process, the communication terminal, acting as the receiving end, receives the optical signal from the multi-core optical fiber and determines whether the multi-core optical fiber is bent based on the optical signal power and signal quality of each fiber core.

[0008] Based on the judgment result and when the multi-core optical fiber is bent, the communication terminal that was the receiving end in the previous communication now acts as the transmitting end, selects a splitter with a corresponding splitting ratio, and sends the optical signal into the multi-core optical fiber.

[0009] In conjunction with the first aspect, in one implementation method,

[0010] The communication terminal is an integrated optical signal transceiver device, and the communication terminal selects a beam splitter with a corresponding splitting ratio according to the attenuation coefficient of each fiber core or whether the multi-core optical fiber is bent, and sends the optical signal into the multi-core optical fiber through a fan-in and fan-out device.

[0011] The fan-in / fan-out device is used to couple the optical signal obtained after the communication terminal splits the light to the multi-core optical fiber, and to receive the optical signal in the multi-core optical fiber and send it to the communication terminal.

[0012] In conjunction with the first aspect, in one implementation method,

[0013] The communication terminal includes a signal receiving module, a digital signal processing module, a signal transmitting module, a control unit module, an optical switch, a first beam splitter, and a second beam splitter.

[0014] The splitting ratio of the first optical splitter corresponds to the attenuation coefficient of each fiber core in the multi-core optical fiber, and the power distributed by the fiber core is positively correlated with the attenuation coefficient of the fiber core.

[0015] The second optical splitter is used to inject optical signals into the middle core of the multi-core optical fiber, while other cores do not receive optical power distribution.

[0016] In conjunction with the first aspect, in one implementation, based on the attenuation coefficient of each fiber core in the multi-core optical fiber obtained from detection, the communication terminal, acting as the communication transmitter, selects a beam splitter with a corresponding splitting ratio before communication begins, and sends the optical signal into the multi-core optical fiber, specifically as follows:

[0017] Before communication begins, the digital signal processing module of the communication terminal, which is the first point of communication, controls the signal transmission module to modulate the signal onto the laser to obtain a modulated optical signal.

[0018] The control unit module controls the optical switch to connect to the first optical splitter. The optical signal is transmitted to the first optical splitter via the optical switch and then sent into the multi-core optical fiber via the fan-in and fan-out devices.

[0019] In conjunction with the first aspect, in one embodiment, during the communication process, the communication terminal, acting as the receiving end, receives optical signals from the multi-core optical fiber and determines whether the multi-core optical fiber is bent based on the optical signal power and signal quality of each fiber core, specifically:

[0020] During communication, the fan-in and fan-out devices of the communication terminal, acting as the receiving end, receive the optical signals from the multi-core optical fiber and send them to the signal receiving module.

[0021] After the signal receiving module preprocesses the optical signal, it sends the resulting signal to the digital signal processing module for parsing and analysis.

[0022] Based on the analysis results, if the signal quality of each fiber core is balanced and the bit error rate is within the set range, the multi-core fiber is considered to be normal; otherwise, the multi-core fiber is considered to be bent.

[0023] In conjunction with the first aspect, in one embodiment, the preprocessing is to amplify, filter, coherently receive, and photoelectrically convert the optical signal.

[0024] In conjunction with the first aspect, in one implementation, based on the judgment result and when the multi-core optical fiber is bent, the communication terminal that acted as the receiving end in the previous communication now acts as the transmitting end, selects a splitter with a corresponding splitting ratio, and sends the optical signal into the multi-core optical fiber, specifically as follows:

[0025] Based on the judgment results:

[0026] When the multi-core optical fiber is bent, the communication terminal that was the receiving end in the previous communication now becomes the transmitting end, selects the second optical splitter, and sends the optical signal into the multi-core optical fiber through the fan-in and fan-out equipment.

[0027] When the multi-core fiber is functioning normally, the communication terminal that was the receiver in the previous communication now acts as the transmitter, selects the first optical splitter, and sends the optical signal into the multi-core fiber through the fan-in and fan-out devices.

[0028] In conjunction with the first aspect, in one embodiment, when the multi-core optical fiber is bent, the communication terminal that was the receiving end in the previous communication now acts as the transmitting end, selects the second optical splitter, and sends the optical signal into the multi-core optical fiber via fan-in and fan-out devices, specifically as follows:

[0029] When the multi-core optical fiber is bent, the digital signal processing module of the communication terminal, which acted as the receiving end in the previous communication, controls the control unit module to connect the optical switch and the second optical splitter.

[0030] When the current communication terminal needs to send a signal, the optical signal is connected to the second optical splitter and sent into the multi-core optical fiber through the fan-in and fan-out equipment.

[0031] In conjunction with the first aspect, in one implementation, when the multi-core optical fiber is functioning normally, the communication terminal that acted as the receiving end in the previous communication now acts as the transmitting end, selects the first optical splitter, and sends the optical signal into the multi-core optical fiber via fan-in and fan-out devices, specifically as follows:

[0032] When the multi-core optical fiber is normal, the digital signal processing module of the communication terminal, which acted as the receiving end in the previous communication, controls the control unit module to connect the optical switch and the first optical splitter.

[0033] When the current communication terminal needs to send a signal, the optical signal is connected to the first optical splitter and sent into the multi-core optical fiber through the fan-in and fan-out equipment.

[0034] Secondly, embodiments of this application provide an apparatus for dynamically allocating fiber core power in a multi-core optical fiber transmission system, the apparatus comprising:

[0035] The selection unit is used to drive the communication terminal, which is the communication transmitter, to select the optical splitter with the corresponding splitting ratio before the communication starts, based on the attenuation coefficient of each fiber core in the multi-core optical fiber obtained by detection, and send the optical signal into the multi-core optical fiber.

[0036] The judgment unit is used to drive the communication terminal, which acts as the receiving end, to receive the optical signal in the multi-core optical fiber during the communication process, and to determine whether the multi-core optical fiber is bent based on the optical signal power and signal quality of each fiber core.

[0037] The execution unit is used to, based on the judgment result and when the multi-core optical fiber is bent, drive the communication terminal, which was the receiving end in the previous communication, to act as the transmitting end at this time, select a splitter with a corresponding splitting ratio, and send the optical signal into the multi-core optical fiber.

[0038] The beneficial effects of the technical solutions provided in this application include:

[0039] Based on the attenuation coefficient of each fiber core in the multi-core fiber obtained from detection, a splitter with the corresponding splitting ratio is selected before communication begins to send the optical signal into the multi-core fiber. During communication, the receiving end receives the optical signal from the multi-core fiber and determines whether the multi-core fiber is bent based on the optical signal power and signal quality of each fiber core. Then, based on the determination result and when the multi-core fiber is bent, a splitter with a corresponding splitting ratio is selected to send the optical signal into the multi-core fiber. This allows for real-time flexible selection of the power allocation ratio according to the optical signal condition, effectively solving the problem of flexible power allocation between fiber cores, improving the effective utilization rate of optical power, reducing unnecessary energy loss, reducing inter-core crosstalk, and improving transmission quality. Attached Figure Description

[0040] Figure 1 This is a flowchart illustrating a method for dynamically allocating fiber core power in a multi-core optical fiber transmission system, as described in this application.

[0041] Figure 2 A schematic diagram of a multi-core optical fiber transmission transceiver architecture;

[0042] Figure 3 This is a schematic diagram of the communication terminal.

[0043] Figure 4 A flowchart illustrating the process of selecting a beam splitter for an optical switch;

[0044] Figure 5 This is a schematic diagram of the structure of a device for dynamically allocating fiber core power in a multi-core optical fiber transmission system according to this application;

[0045] Figure 6 This is a schematic diagram of the hardware structure of the device for dynamically allocating fiber core power in a multi-core optical fiber transmission system, as described in this application. Detailed Implementation

[0046] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0047] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0048] In a first aspect, embodiments of this application provide a method for dynamically allocating fiber core power in a multi-core optical fiber transmission system.

[0049] In one embodiment, reference is made to Figure 1 , Figure 1 This is a flowchart illustrating the method for dynamically allocating fiber core power in a multi-core optical fiber transmission system according to this application. Figure 1 As shown, the methods for dynamically allocating fiber core power in a multi-core optical fiber transmission system include:

[0050] S1: Based on the attenuation coefficient of each fiber core in the multi-core optical fiber obtained by detection, before the communication starts, the communication terminal (which is the communication start end) selects a splitter with the corresponding splitting ratio to send the optical signal into the multi-core optical fiber.

[0051] S2: During the communication process, the communication terminal, acting as the receiving end, receives the optical signal in the multi-core optical fiber and determines whether the multi-core optical fiber is bent based on the optical signal power and signal quality of each fiber core.

[0052] S3: Based on the judgment result and when the multi-core fiber is bent, the communication terminal that was the receiving end in the previous communication now acts as the transmitting end, selects a splitter with a corresponding splitting ratio, and sends the optical signal into the multi-core fiber.

[0053] It should be noted that during the production of multi-core optical fibers, the loss coefficient (attenuation coefficient) of each fiber core cannot be controlled to be exactly the same. In practical applications, some fiber cores will have a higher loss coefficient. In previous solutions, in order to ensure that the transmission of each fiber core can be effective, the power of all fiber cores would be increased to the threshold that can meet the normal transmission of the fiber core with the highest loss coefficient. This would inevitably cause redundancy in transmission energy, thereby reducing energy utilization. Considering the optical cable laying situation, there will be bending of the optical cable. For multi-core optical fibers, the fiber cores on the bending side and the opposite side are more affected. In this case, the injected optical power can also be flexibly allocated according to the bending situation of the fiber core to minimize the loss of optical power.

[0054] To address the aforementioned problems that may arise in practical applications, this application provides a method for dynamically allocating fiber core power in a multi-core fiber transmission system. At the initial communication end, the attenuation coefficient of each fiber core in the multi-core fiber is pre-detected, and a splitter with a suitable splitting ratio is selected to send the optical signal into the multi-core fiber. At the receiving end, the system determines whether the multi-core fiber is bent based on the quality of the received signal. Then, based on the bending determination result, a splitter with a suitable splitting ratio is selected to allocate the power of the optical signal and send it into the multi-core fiber for transmission. At the other end, after receiving the optical signal, the system also selects the corresponding splitter based on the bending determination result to transmit the optical signal. This achieves real-time flexible selection of the power allocation ratio according to the signal conditions, improving the effective utilization rate of optical power and reducing unnecessary energy loss.

[0055] For details, see Figure 2 The diagram shows a multi-core fiber optic transmission transceiver architecture, comprising two communication terminals connected by a multi-core fiber optic cable. Optical signals are transmitted between the two terminals via this cable. Each communication terminal is an integrated optical signal transceiver, functioning as both a transmitter and receiver. The optical signals from each communication terminal are coupled to the multi-core fiber optic cable via fan-in / fan-out devices. These devices couple the split optical signals from the communication terminals to the multi-core fiber optic cable and receive the optical signals from the multi-core fiber optic cable, sending them to the communication terminals. The communication terminals select a splitter with the appropriate splitting ratio based on the attenuation coefficient of each fiber core or whether the multi-core fiber is bent, and then send the optical signals into the multi-core fiber optic cable via the fan-in / fan-out devices.

[0056] Specifically, assuming Figure 2 The two communication terminals included are communication terminal A and communication terminal B. When the optical signal is sent from communication terminal A to communication terminal B, then communication terminal A is the sender and communication terminal B is the receiver; when communication terminal B sends the signal to communication terminal A, then communication terminal B is the sender and communication terminal A is the receiver.

[0057] If the optical signal is initially transmitted from the transmitter to the receiver, before communication begins, an optical fiber detector is used to obtain the attenuation coefficient of each fiber core in the multi-core optical fiber. Based on the attenuation coefficient, a suitable splitter is selected to control the power of each fiber core to a roughly balanced value. The transmitter sends the optical signal through fan-in / fan-out devices into the multi-core optical fiber. After receiving the optical signal, the receiver analyzes it to determine if the multi-core optical fiber is bent. If no bend is found, a suitable splitter is selected, and the optical signal is sent to the transmitter when the receiver needs to transmit a signal. If a bend is found, another splitter is selected, and the optical signal is sent to the transmitter when the receiver needs to transmit a signal. After receiving the signal, the transmitter can continue to determine if the multi-core optical fiber is bent based on the signal power distribution of each fiber core and select a suitable splitter. The selection of the splitter throughout the entire communication process follows this process.

[0058] It should be noted that the multi-core optical fiber in this embodiment is a centrally symmetric, weakly coupled 7-fiber optical fiber. The outer cores are evenly distributed around the middle core, and the attenuation coefficients of each core are not exactly the same. When light propagates in these cores, there is a power coupling process. Eventually, the normalized power in each core will tend to a stable value. When the multi-core optical fiber is bent, it will affect the power coupling, leading to increased optical power loss, aggravated inter-core crosstalk, and a prolonged time for the normalized power in each core to tend to stabilize. Moreover, the proportion of light escaping increases in the cores near the bending direction and on the opposite side of the bending direction, and this part of the optical power is attenuated. Therefore, for this type of optical fiber bending, the method of dynamic allocation of core power in the multi-core optical fiber transmission system of this application is adopted to reduce the communication quality loss caused by bending.

[0059] Furthermore, in one embodiment, see [link to embodiment]. Figure 3 As shown, the communication terminal described in this application includes a signal receiving module, a digital signal processing module, a signal transmitting module, a control unit module, an optical switch, a first optical splitter, and a second optical splitter. The splitting ratio of the first optical splitter corresponds to the attenuation coefficient of each fiber core in the multi-core optical fiber, and the power distribution of the fiber core is positively correlated with the attenuation coefficient of the fiber core. The second optical splitter is used to inject the optical signal into the middle fiber core of the multi-core optical fiber, and no optical power distribution is performed on the other fiber cores.

[0060] Furthermore, in one embodiment, based on the attenuation coefficient of each fiber core in the multi-core optical fiber obtained from detection, the communication terminal, acting as the communication transmitter, selects a beam splitter with a corresponding splitting ratio before communication begins, and sends the optical signal into the multi-core optical fiber, specifically as follows:

[0061] S101: Before communication begins, the digital signal processing module of the communication terminal, which is the first point of communication, controls the signal transmission module to modulate the signal onto the laser to obtain a modulated optical signal;

[0062] S102: The control unit module controls the optical switch to connect to the first optical splitter. The optical signal is transmitted to the first optical splitter via the optical switch and sent into the multi-core optical fiber via the fan-in and fan-out devices.

[0063] For example, if an optical signal is initially sent from one communication terminal to another, then the current communication terminal is the initiating end (transmitter), and the other communication terminal is the receiving end. During the initial communication establishment, the optical switch is connected to the first optical splitter by default. At this time, the digital signal processing module of the transmitting terminal controls the signal transmission module to modulate the signal onto the laser, obtaining a modulated optical signal. The control unit module of the transmitting end controls the optical switch to connect to the first optical splitter. The first optical splitter is designed with a power allocation ratio based on the attenuation coefficient of each fiber core in a multi-core optical fiber. Fibers with larger attenuation coefficients receive more power, while those with smaller attenuation coefficients receive relatively less power. This balanced power distribution among the fiber cores not only helps reduce inter-core crosstalk but also improves the utilization rate of optical power. After exiting the first optical splitter, the optical signal is connected to the fan-in / fan-out device of the transmitting end, which then feeds the signal into the multi-core optical fiber and sends it to the receiving end.

[0064] Furthermore, in one embodiment, during the communication process, the communication terminal, acting as the receiving end, receives the optical signal from the multi-core optical fiber and determines whether the multi-core optical fiber is bent based on the optical signal power and signal quality of each fiber core. Specifically:

[0065] S201: During communication, the fan-in and fan-out devices of the communication terminal, acting as the receiving end, receive the optical signals in the multi-core optical fiber and send them to the signal receiving module.

[0066] S202: After preprocessing the optical signal, the signal receiving module sends the obtained signal to the digital signal processing module for parsing and analysis; the preprocessing includes amplification, filtering, coherent reception and photoelectric conversion of the optical signal;

[0067] S203: Based on the analysis results, if the signal quality of each fiber core is balanced and the bit error rate is within the set range, then the multi-core fiber is judged to be normal; otherwise, the multi-core fiber is judged to be bent.

[0068] The optical signal is initially sent from the transmitter to the receiver. During the communication process, the fan-in / fan-out devices at the receiver receive the optical signal from the multi-core optical fiber and send it to the signal receiving module of the receiver's communication terminal. The signal receiving module amplifies, filters, coherently receives, and performs photoelectric conversion on the optical signal. Then, it is sent to the digital signal processing module of the receiver's communication terminal for processing and analysis. If the signal quality of each fiber core is relatively uniform and the bit error rate is within one order of magnitude, the multi-core optical fiber is considered to be normal. If the signal quality of some fiber cores is very poor, the multi-core optical fiber is considered to be severely bent and intervention is required.

[0069] Furthermore, in one embodiment, based on the judgment result and when the multi-core optical fiber is bent, the communication terminal that acted as the receiving end in the previous communication now acts as the transmitting end, selects a beam splitter with a corresponding splitting ratio, and sends the optical signal into the multi-core optical fiber, specifically as follows:

[0070] Based on the judgment results:

[0071] When the multi-core optical fiber is bent, the communication terminal that was the receiving end in the previous communication now becomes the transmitting end, selects the second optical splitter, and sends the optical signal into the multi-core optical fiber through the fan-in and fan-out equipment.

[0072] When the multi-core fiber is functioning normally, the communication terminal that was the receiver in the previous communication now acts as the transmitter, selects the first optical splitter, and sends the optical signal into the multi-core fiber through the fan-in and fan-out devices.

[0073] For example, suppose Figure 2 The two communication terminals included are communication terminal A and communication terminal B. When the optical signal is sent from communication terminal A to communication terminal B, if it is determined that the multi-core optical fiber is bent, then communication terminal B, as the transmitting end, selects the second optical splitter and sends the optical signal into the multi-core optical fiber through the fan-in and fan-out devices; if it is determined that the multi-core optical fiber is normal, then communication terminal B, as the transmitting end, selects the first optical splitter and sends the optical signal into the multi-core optical fiber through the fan-in and fan-out devices.

[0074] Furthermore, in one embodiment, when the multi-core optical fiber is bent, the communication terminal that acted as the receiving end in the previous communication now acts as the transmitting end, selects the second optical splitter, and sends the optical signal into the multi-core optical fiber via fan-in and fan-out devices, specifically:

[0075] S301: When the multi-core optical fiber is bent, the digital signal processing module of the communication terminal that acted as the receiving end in the previous communication connects the optical switch and the second optical splitter to the control unit module.

[0076] S302: When the current communication terminal needs to send a signal, the optical signal is connected to the second optical splitter and sent into the multi-core optical fiber through the fan-in and fan-out equipment.

[0077] Following step S203, when it is determined that the multi-core optical fiber is bent, the digital signal processing module of the receiving end communication terminal sends a signal to the control unit module. The control unit module controls the optical switch to connect to the second optical splitter. When the communication terminal needs to send a signal, the optical signal is connected to the second optical splitter and sent into the multi-core optical fiber through the fan-in and fan-out devices. The second optical splitter distributes all optical power to a single output port. When a communication terminal at one end wants to send an optical signal to another communication terminal, it selects the second optical splitter to connect the optical signal to the fan-in / fan-out device. The second optical splitter injects the optical signal into the middle core of the multi-core fiber, while other cores are not allocated optical power. Because optical power coupling occurs between the cores of the multi-core fiber, the greater the optical power of the middle core, the more energy is coupled to the surrounding cores. At the same time, the optical power of the middle core, which is least affected by fiber bending, is still guaranteed to be the maximum. The optical power loss caused by light emission in the bending direction and opposite cores is greatly reduced. The surrounding cores, because they have coupled some optical power, can still serve as transmission channels for effective signal transmission. In this way, optical power loss can be minimized and the transmission capacity of the multi-core fiber can be maximized, ensuring that the transmission capacity does not decrease significantly due to fiber bending.

[0078] Furthermore, in one embodiment, when the multi-core optical fiber is functioning normally, the communication terminal that acted as the receiving end in the previous communication now acts as the transmitting end, selects the first optical splitter, and sends the optical signal into the multi-core optical fiber via fan-in and fan-out devices, specifically as follows:

[0079] S311: When the multi-core optical fiber is normal, the digital signal processing module of the communication terminal that acted as the receiving end in the previous communication controls the control unit module to connect the optical switch and the first optical splitter.

[0080] S312: When the current communication terminal needs to send a signal, the optical signal is connected to the first optical splitter and sent into the multi-core optical fiber through the fan-in and fan-out equipment.

[0081] Following step S203, when it is determined that the multi-core optical fiber is normal, the digital signal processing module of the receiving end communication terminal sends a signal to the control unit module. The control unit module controls the optical switch to connect to the first optical splitter. When the communication terminal needs to send a signal, the optical signal is connected to the first optical splitter and sent into the multi-core optical fiber through the fan-in and fan-out devices.

[0082] The following combination Figure 4 This application describes the process of selecting the splitter using an optical switch.

[0083] A: Determine whether the current communication terminal is an optical signal receiver. If yes, proceed to B; otherwise, proceed to C.

[0084] B: Analyze the received optical signal and proceed to D;

[0085] C: Determine whether the current communication terminal is sending an optical signal for the first time. If yes, proceed to F; otherwise, proceed to G.

[0086] D: Determine if an optical fiber bend has occurred that affects communication quality. If yes, proceed to E; otherwise, proceed to F.

[0087] E: The control unit module selects the second beam splitter, and the process ends.

[0088] F: Select the first beam splitter according to the preset settings, then end;

[0089] G: Select the splitter based on the analysis result of the previously received optical signal, then end.

[0090] It should be noted that the method for dynamically allocating fiber core power in a multi-core fiber transmission system described in this application embodiment is applicable not only to 7-fiber fibers, but also to other numbers of core-based weakly coupled multi-core fibers.

[0091] This application's embodiment of the method for dynamic power allocation among fiber cores in a multi-core fiber transmission system, based on the detected attenuation coefficient of each fiber core, selects a splitter with a corresponding splitting ratio before communication begins, sending the optical signal into the multi-core fiber. During communication, the receiving end receives the optical signal from the multi-core fiber and determines whether the multi-core fiber is bent based on the optical signal power and signal quality of each fiber core. Then, based on the determination result and when the multi-core fiber is bent, a splitter with a corresponding splitting ratio is selected to send the optical signal into the multi-core fiber. This allows for real-time and flexible selection of the power allocation ratio based on the optical signal conditions, effectively solving the problem of flexible power allocation among fiber cores, improving the effective utilization rate of optical power, reducing unnecessary energy loss, reducing inter-core crosstalk, and improving transmission quality.

[0092] Secondly, embodiments of this application also provide a device for dynamically allocating fiber core power in a multi-core optical fiber transmission system.

[0093] In one embodiment, reference is made to Figure 5 , Figure 5 This is a schematic diagram of the functional modules of the device for dynamically allocating fiber core power in a multi-core optical fiber transmission system, as described in this application. Figure 5 As shown, the device for dynamically allocating fiber core power in a multi-core optical fiber transmission system includes a selection unit, a judgment unit, and an execution unit.

[0094] The selection unit is used to drive the communication terminal, acting as the communication transmitter, to select a splitter with the corresponding splitting ratio before communication begins, based on the attenuation coefficient of each fiber core in the multi-core fiber obtained from detection, and to send the optical signal into the multi-core fiber; the judgment unit is used to drive the communication terminal, acting as the receiver, to receive the optical signal in the multi-core fiber during communication, and to determine whether the multi-core fiber is bent based on the optical signal power and signal quality of each fiber core; the execution unit is used to drive the communication terminal, which was the receiver in the previous communication, to act as the transmitter now, select a splitter with the corresponding splitting ratio, and send the optical signal into the multi-core fiber, based on the judgment result and when the multi-core fiber is bent.

[0095] Thirdly, embodiments of this application provide a device for dynamically allocating fiber core power in a multi-core optical fiber transmission system. The device for dynamically allocating fiber core power in a multi-core optical fiber transmission system can be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0096] Reference Figure 6 , Figure 6 This is a schematic diagram of the hardware structure of a device for dynamically allocating fiber core power in a multi-core fiber optic transmission system, as described in an embodiment of this application. In this embodiment, the device for dynamically allocating fiber core power in a multi-core fiber optic transmission system may include a processor, a memory, a communication interface, and a communication bus.

[0097] The communication bus can be of any type and is used to interconnect the processor, memory, and communication interface.

[0098] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces. These interfaces are used for interconnecting internal devices within a multi-core fiber optic transmission system to achieve dynamic power allocation within the fiber cores. They also serve as interfaces for interconnecting the system with other devices (such as other computing devices or user equipment). Physical interfaces can be Ethernet interfaces, fiber optic interfaces, ATM interfaces, etc.; user equipment can be displays, keyboards, etc.

[0099] Memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0100] The processor can be a general-purpose processor, which can call a program stored in memory to dynamically allocate fiber core power in a multi-core fiber optic transmission system and execute the method for dynamically allocating fiber core power in a multi-core fiber optic transmission system provided in the embodiments of this application. For example, the general-purpose processor can be a central processing unit (CPU). The method executed when the program for dynamically allocating fiber core power in a multi-core fiber optic transmission system is called can refer to the various embodiments of the method for dynamically allocating fiber core power in a multi-core fiber optic transmission system in this application, and will not be repeated here.

[0101] Those skilled in the art will understand that Figure 6 The hardware structure shown does not constitute a limitation of this application and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0102] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus. The terms "first," "second," and "third," etc., are used to distinguish different objects, etc., and do not indicate a sequence, nor do they limit "first," "second," and "third" to different types.

[0103] In the description of the embodiments of this application, terms such as "exemplary," "for example," or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary," "for example," or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary," "for example," or "for instance" is intended to present the relevant concepts in a concrete manner.

[0104] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0105] In some processes described in the embodiments of this application, multiple operations or steps are included in a specific order. However, it should be understood that these operations or steps may not be executed in the order they appear in the embodiments of this application, or they may be executed in parallel. The sequence number of the operation is only used to distinguish different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed sequentially or in parallel, and these operations or steps may be combined.

[0106] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device to execute the methods described in the various embodiments of this application.

[0107] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for dynamically allocating fiber core power in a multi-core optical fiber transmission system, characterized in that, The method for dynamically allocating fiber core power in a multi-core optical fiber transmission system includes: Based on the attenuation coefficient of each fiber core in the multi-core optical fiber obtained by detection, the communication terminal, which is the communication transmitter, selects a splitter with the corresponding splitting ratio before the communication starts and sends the optical signal into the multi-core optical fiber. During the communication process, the communication terminal, acting as the receiving end, receives the optical signal from the multi-core optical fiber and determines whether the multi-core optical fiber is bent based on the optical signal power and signal quality of each fiber core. Based on the judgment result and when the multi-core optical fiber is bent, the communication terminal that was the receiving end in the previous communication now acts as the transmitting end, selects a splitter with a corresponding splitting ratio, and sends the optical signal into the multi-core optical fiber.

2. The method for dynamic allocation of fiber core power in a multi-core optical fiber transmission system as described in claim 1, characterized in that: The communication terminal is an integrated optical signal transceiver device, and the communication terminal selects a beam splitter with a corresponding splitting ratio according to the attenuation coefficient of each fiber core or whether the multi-core optical fiber is bent, and sends the optical signal into the multi-core optical fiber through a fan-in and fan-out device. The fan-in / fan-out device is used to couple the optical signal obtained after the communication terminal splits the light to the multi-core optical fiber, and to receive the optical signal in the multi-core optical fiber and send it to the communication terminal.

3. The method for dynamically allocating fiber core power in a multi-core optical fiber transmission system as described in claim 2, characterized in that: The communication terminal includes a signal receiving module, a digital signal processing module, a signal transmitting module, a control unit module, an optical switch, a first beam splitter, and a second beam splitter. The splitting ratio of the first optical splitter corresponds to the attenuation coefficient of each fiber core in the multi-core optical fiber, and the power distributed by the fiber core is positively correlated with the attenuation coefficient of the fiber core. The second optical splitter is used to inject optical signals into the middle core of the multi-core optical fiber, while other cores do not receive optical power distribution.

4. The method for dynamically allocating fiber core power in a multi-core optical fiber transmission system as described in claim 3, characterized in that, Based on the attenuation coefficient of each fiber core in the multi-core optical fiber obtained from detection, before communication begins, the communication terminal, acting as the communication transmitter, selects a beam splitter with the corresponding splitting ratio to send the optical signal into the multi-core optical fiber, specifically as follows: Before communication begins, the digital signal processing module of the communication terminal, which is the first point of communication, controls the signal transmission module to modulate the signal onto the laser to obtain a modulated optical signal. The control unit module controls the optical switch to connect to the first optical splitter. The optical signal is transmitted to the first optical splitter via the optical switch and then sent into the multi-core optical fiber via the fan-in and fan-out devices.

5. The method for dynamically allocating fiber core power in a multi-core optical fiber transmission system as described in claim 3, characterized in that, During the communication process, the communication terminal, acting as the receiving end, receives the optical signals from the multi-core optical fiber and determines whether the multi-core optical fiber is bent based on the optical signal power and signal quality of each fiber core. Specifically: During communication, the fan-in and fan-out devices of the communication terminal, acting as the receiving end, receive the optical signals from the multi-core optical fiber and send them to the signal receiving module. After the signal receiving module preprocesses the optical signal, it sends the resulting signal to the digital signal processing module for parsing and analysis. Based on the analysis results, if the signal quality of each fiber core is balanced and the bit error rate is within the set range, the multi-core fiber is considered to be normal; otherwise, the multi-core fiber is considered to be bent.

6. The method for dynamically allocating fiber core power in a multi-core optical fiber transmission system as described in claim 5, characterized in that: The preprocessing involves amplifying, filtering, coherently receiving, and photoelectrically converting the optical signal.

7. The method for dynamically allocating fiber core power in a multi-core optical fiber transmission system as described in claim 5, characterized in that, Based on the judgment result and when the multi-core optical fiber is bent, the communication terminal that acted as the receiving end in the previous communication now acts as the transmitting end, selecting a splitter with a corresponding splitting ratio to send the optical signal into the multi-core optical fiber, specifically: Based on the judgment results: When the multi-core optical fiber is bent, the communication terminal that was the receiving end in the previous communication now becomes the transmitting end, selects the second optical splitter, and sends the optical signal into the multi-core optical fiber through the fan-in and fan-out equipment. When the multi-core fiber is functioning normally, the communication terminal that was the receiver in the previous communication now acts as the transmitter, selects the first optical splitter, and sends the optical signal into the multi-core fiber through the fan-in and fan-out devices.

8. The method for dynamically allocating fiber core power in a multi-core optical fiber transmission system as described in claim 7, characterized in that, When the multi-core optical fiber bends, the communication terminal that acted as the receiving end in the previous communication now acts as the transmitting end, selects the second optical splitter, and sends the optical signal into the multi-core optical fiber through the fan-in and fan-out devices, specifically as follows: When the multi-core optical fiber is bent, the digital signal processing module of the communication terminal, which acted as the receiving end in the previous communication, controls the control unit module to connect the optical switch and the second optical splitter. When the current communication terminal needs to send a signal, the optical signal is connected to the second optical splitter and sent into the multi-core optical fiber through the fan-in and fan-out equipment.

9. The method for dynamically allocating fiber core power in a multi-core optical fiber transmission system as described in claim 7, characterized in that, When the multi-core optical fiber is functioning normally, the communication terminal that acted as the receiving end in the previous communication now acts as the transmitting end, selects the first optical splitter, and sends the optical signal into the multi-core optical fiber through the fan-in and fan-out devices, specifically as follows: When the multi-core optical fiber is normal, the digital signal processing module of the communication terminal, which acted as the receiving end in the previous communication, controls the control unit module to connect the optical switch and the first optical splitter. When the current communication terminal needs to send a signal, the optical signal is connected to the first optical splitter and sent into the multi-core optical fiber through the fan-in and fan-out equipment.

10. A device for dynamically allocating fiber core power in a multi-core optical fiber transmission system, characterized in that, The device for dynamically allocating fiber core power in a multi-core optical fiber transmission system includes: The selection unit is used to drive the communication terminal, which is the communication transmitter, to select the optical splitter with the corresponding splitting ratio before the communication starts, based on the attenuation coefficient of each fiber core in the multi-core optical fiber obtained by detection, and send the optical signal into the multi-core optical fiber. The judgment unit is used to drive the communication terminal, which acts as the receiving end, to receive the optical signal in the multi-core optical fiber during the communication process, and to determine whether the multi-core optical fiber is bent based on the optical signal power and signal quality of each fiber core. The execution unit is used to, based on the judgment result and when the multi-core optical fiber is bent, drive the communication terminal, which was the receiving end in the previous communication, to act as the transmitting end at this time, select a splitter with a corresponding splitting ratio, and send the optical signal into the multi-core optical fiber.

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