Multicore fiber crosstalk measurement method and apparatus

Abstract

This invention relates to the field of cable testing technology, and particularly to a multi-core fiber optic crosstalk measurement device. The device includes an optical transmitter for generating a pulsed optical signal with predetermined parameters; an optical output port connected to the optical transmitter for transmitting the pulsed optical signal to any one of the multiple cores of the multi-core fiber; an optical input port for receiving scattered light generated from another core different from the randomly selected core; an optical receiver connected to the optical input port for receiving the scattered light; and a signal processing unit configured to output an OTDR waveform based on the scattered light and obtain the crosstalk attenuation value between the cores based on the OTDR waveform and the predetermined parameters. This invention also relates to a multi-core fiber optic crosstalk measurement method, equipment, medium, and program product. The solution of this invention ensures consistency when measuring crosstalk in multi-core fibers and has the characteristic of high measurement accuracy.

Description

Technical Field

[0001] This invention relates to the field of cable testing technology, and in particular to a method, apparatus, equipment, medium, and program product for measuring crosstalk in multi-core optical fibers. Background Technology

[0002] In existing technologies, measurement techniques and equipment for single-core optical fibers are relatively mature. Current OTDRs (Optical Time Domain Reflectometers) contain an optical splitter. The input and output ports of the optical splitter are combined and connected to the single-core optical fiber. The output port of the optical splitter outputs a pulsed optical signal, which is injected into the core of the single-core optical fiber under test. Scattered light is generated in the core and returns to the input port of the optical splitter. After being split by the optical splitter, the light is input to an optical receiver. The optical receiver converts the scattered light signal into an electrical signal, which is then processed by a signal processing unit. The processing result is displayed on a monitor. Current OTDRs are mainly used for measuring the attenuation and length of single-core optical fibers; therefore, they can only measure the same core of a single-core fiber and cannot be used to measure crosstalk between cores of multi-core optical fibers.

[0003] With the large-scale construction of AI computing centers, the amount of optical fiber used is more than three times that of ordinary data centers. In order to save space for fiber optic cable interconnection and avoid cable congestion, multi-core optical fibers are widely used. Since the spacing between the cores in multi-core optical fibers is only tens of micrometers, optical signal coupling between the cores is difficult to avoid, which inevitably leads to crosstalk problems between the cores, and thus affects the quality of communication transmission.

[0004] How to accurately measure the crosstalk between cores in a multi-core optical fiber, and thereby improve the design and manufacturing process of the multi-core optical fiber, reduce crosstalk between cores, and improve the performance of the multi-core optical fiber, is an urgent problem to be solved. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem that crosstalk between multi-core optical fibers cannot be measured or is inaccurate in the prior art.

[0006] To address the aforementioned technical problems, this invention provides a method, apparatus, device, medium, and program product for measuring crosstalk in multi-core optical fibers. By employing optical input ports and optical output ports, crosstalk between different cores of a multi-core optical fiber can be measured.

[0007] In a first aspect, embodiments of the present invention disclose a multi-core optical fiber crosstalk measurement device for measuring crosstalk between the cores of a multi-core optical fiber, the device comprising: An optical transmitter for generating a pulsed optical signal with predetermined parameters; An optical output port is connected to the optical transmitter and is used to send the pulsed optical signal to any one of the multiple cores of the multi-core optical fiber. An optical input port is provided for receiving scattered light generated from another core that is different from any one of the multiple cores. An optical receiver, connected to the optical input port, and used to detect the scattered light received by the optical input port; and A signal processing unit is configured to output an OTDR waveform based on the scattered light, and to obtain a crosstalk attenuation value between any one core and the other core based on the OTDR waveform and the predetermined parameters.

[0008] Optionally, the signal processing unit is connected to the light emitter.

[0009] Optionally, the signal processing unit controls the optical transmitter to emit the pulsed light signal.

[0010] Optionally, the multi-core fiber crosstalk measurement device further includes a display for displaying the OTDR waveform and the crosstalk attenuation value.

[0011] Secondly, embodiments of the present invention disclose a method for measuring crosstalk in multi-core optical fibers, which uses the aforementioned multi-core optical fiber crosstalk measuring device to measure crosstalk between the cores of a multi-core optical fiber, including: Generate a pulsed light signal with predetermined parameters; The pulsed optical signal is sent to any one of the multiple cores of the multi-core optical fiber; Receive scattered light from another core that is different from any one of the multiple cores, wherein the scattered light is generated by crosstalk of the pulsed light signal to the other core; The OTDR waveform is output based on the scattered light; The first crosstalk value is obtained based on the predetermined parameters; The second crosstalk value is obtained based on the first mathematical model and the OTDR waveform; Based on the second mathematical model, the first crosstalk value, and the second crosstalk value, a crosstalk attenuation value is obtained, which is used to determine the matching degree between any one core and the other core.

[0012] Optionally, the first mathematical model is Wherein, L1 represents the position of the first end of the other core, and L2 represents the position of the last end of the other core. The value represents the second crosstalk value, and P represents the numerical value of the OTDR waveform.

[0013] Optionally, the second mathematical model is , wherein Represents the first crosstalk value, the This represents the crosstalk attenuation value.

[0014] Thirdly, embodiments of the present invention disclose an electronic device, the device including a processor and a memory storing computer-executable instructions, the processor being configured to execute the instructions to implement the above-described multi-core fiber crosstalk measurement method.

[0015] Fourthly, embodiments of the present invention disclose a computer-readable storage medium storing at least one computer instruction, which is loaded and executed by a processor to implement the above-described multi-core fiber crosstalk measurement method.

[0016] Fifthly, embodiments of the present invention disclose a computer program product, the computer program product including computer instructions, which, when executed, implement the above-described multi-core fiber crosstalk measurement method.

[0017] The main differences and effects of the embodiments of the present invention compared with the prior art are as follows: The multi-core fiber crosstalk measurement device of this invention differs from traditional OTDR measurement devices. It eliminates the optical splitter fixed inside the OTDR, employing separate optical input and output ports. The input and received light originate from different cores within the multi-core fiber, eliminating superposition errors in the measurement results. This allows for the measurement of crosstalk attenuation values ​​between different cores of the multi-core fiber. Unlike methods using optical multiplexers to measure crosstalk in multi-core fibers, the device and method of this invention exhibit excellent consistency and stability at the optical input port used to measure crosstalk in the fiber core under test. By utilizing the multi-core fiber crosstalk measurement method and device of this invention, the use of different cores with severe crosstalk is effectively avoided, significantly improving the quality of communication transmission. Attached Figure Description

[0018] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] Figure 1 This is a structural block diagram of a multi-core fiber crosstalk measurement device according to a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of a multi-core fiber crosstalk measurement device and a multi-core fiber connection in a preferred embodiment of the present invention; Figure 3 This is a flowchart of a multi-core optical fiber crosstalk measurement method in a preferred embodiment of the present invention; Figure 4 This is a crosstalk power distribution diagram of a core under test in a preferred embodiment of the present invention; Figure 5 This is a hardware structure block diagram of an electronic device according to a preferred embodiment of the present invention.

[0020] Explanation of reference numerals in the accompanying drawings: 1. Optical transmitter; 2. Optical output port; 3. Optical input port; 4. Optical receiver; 5. Signal processing unit; 6. Display; 7. FIFO fiber optic adapter; 8. Multi-core fiber optic cable. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0022] In multi-core optical fibers, the spacing between the cores is very small, and the coupling of pulse optical signals between the cores is inevitable, which leads to crosstalk between the cores. Accurate measurement of crosstalk between the cores is necessary to improve the quality of communication transmission.

[0023] The multi-core fiber crosstalk measurement device of the present invention can solve the above problems.

[0024] Example 1 Figure 1 This is a structural block diagram of a multi-core fiber crosstalk measurement device according to a preferred embodiment of the present invention.

[0025] refer to Figure 1 As shown, the multi-core fiber crosstalk measurement device of the present invention includes an optical transmitter 1, an optical output port 2, an optical input port 3, an optical receiver 4, a signal processing unit 5, and a display 6.

[0026] In one embodiment, the signal processing unit 5 of the multi-core fiber crosstalk measurement device of the present invention is connected to the optical transmitter 1. The signal processing unit 5 can control the optical transmitter 1 to generate a pulsed optical signal with predetermined parameters and control the optical transmitter 1 to send the pulsed optical signal. The optical output port 2 is connected to the optical transmitter 1 and is used to send the pulsed optical signal to any one of the multiple cores of the multi-core fiber 8. The optical input port 3 is used to receive scattered light generated from another core that is different from any one of the multiple cores. The optical receiver 4 is connected to the optical input port 3 and is used to detect the scattered light received by the optical input port 3. The signal processing unit 5 is configured to output an OTDR waveform based on the scattered light and obtain the crosstalk attenuation value between any one core and another core based on the OTDR waveform and predetermined parameters. The display 6 is used to display the OTDR waveform and the crosstalk attenuation value.

[0027] The signal processing unit 5 can adjust the parameters of the pulsed light signal, process the scattered light data caused by crosstalk, and transmit it to the display 6 in the form of an OTDR waveform for display. It can also calculate the crosstalk attenuation value between cores based on the OTDR waveform and the parameters of the pulsed light signal, forming a quantization standard. The device of this invention is not affected by the additional attenuation caused by backscattered light passing through optical multiplexers and optical splitters used in some schemes, and the measurement results of the signal processing unit 5 have no superposition error.

[0028] In one example, the signal processing unit 5 sets the parameters of the pulsed optical signal and controls the optical transmitter 1 to generate a pulsed optical signal with corresponding parameters, including the light source wavelength, pulse width, fiber length range, effective group refractive index of the core, and signal averaging frequency (or time). The optical transmitter 1 is connected to the optical output port 2, and transmits the pulsed optical signal to the test point, which serves as the reference core, through the optical output port 2. Affected by the pulsed optical signal, the core under test adjacent to the reference core generates corresponding scattered light. The optical receiver 4 detects and receives the scattered light generated in the core under test through the optical input port 3. Finally, the scattered light data is transmitted to the signal processing unit 5, which processes the scattered light data and outputs an OTDR waveform. Based on the OTDR waveform and the parameters of the pulsed optical signal, the crosstalk attenuation value between the reference core and the core under test is obtained. Furthermore, those skilled in the art will understand that the crosstalk level between the reference core and the core under test can be determined based on the crosstalk attenuation value. The crosstalk attenuation values ​​between different cores can be scored or ranked to quantify the severity of crosstalk.

[0029] Figure 2 This is a schematic diagram of a multi-core fiber crosstalk measurement device and a multi-core fiber connection in a preferred embodiment of the present invention.

[0030] refer to Figure 2 The multi-core optical fiber 8 is connected to the crosstalk testing device via a FIFO optical fiber adapter 7. The spacing between the cores in the multi-core optical fiber 8 is measured in micrometers. The scattered light generated by crosstalk on the cores is very weak and difficult to capture. Furthermore, the transmission material used to transmit the power of the scattered light, such as silicon dioxide, will lose the already weak scattered light. Different transmission lines will cause inconsistencies in the measurement environment. To ensure the uniformity of the measurement environment and avoid data deviation caused by the lack of uniformity of the measurement environment due to the use of different ports, optical multiplexers, or transmission channels, this invention uses a FIFO optical fiber adapter 7, which can connect the multiple cores in the multi-core optical fiber 8 to the optical output port 2 and optical input port 3 of the multi-core optical fiber crosstalk measurement device of this invention, respectively.

[0031] In one implementation, the FIFO fiber optic adapter 7 has single-core fibers on both sides with the same number of cores as the multi-core fiber 8. The single-core fibers on one side of the FIFO fiber optic adapter 7 are fixed together, and the core positions of each single-core fiber in the fixing head are consistent with the positions of multiple cores in the multi-core fiber 8. The single-core fiber on the other side of the FIFO fiber optic adapter 7 is used to connect the optical output port 2 and the optical input port 3.

[0032] This embodiment corresponds to the multi-core fiber crosstalk measurement device and multi-core fiber connection embodiment of the present invention. The relevant technical details mentioned in the foregoing embodiments remain valid in this embodiment. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied to the foregoing embodiments.

[0033] Preferably, the solidified single-core fiber on one side of the FIFO fiber optic adapter is aligned with each core of the multi-core fiber 8 and then fixedly connected by fusion splicing. The single-core fiber on the other side of the FIFO fiber optic adapter 7 is movably connected to the optical output port 2 and the optical input port 3 through a connecting plug.

[0034] In one example, any one of the single-core optical fibers of the FIFO fiber optic adapter 7 is connected to the optical output port 2, and the core of the single-core optical fiber is used as the reference core for crosstalk measurement. Another single-core optical fiber, different from the reference core, is connected to the optical input port 3, and the core of the single-core optical fiber is used as the core to be measured for crosstalk measurement.

[0035] The multi-core fiber crosstalk measurement device of the present invention can guarantee the uniqueness of the optical path for crosstalk measurement.

[0036] Example 2 Figure 3 This is a flowchart of a multi-core optical fiber crosstalk measurement method in a preferred embodiment of the present invention.

[0037] Based on the same inventive concept, this embodiment provides a method for measuring crosstalk in multi-core optical fibers. The principle of solving the problem is similar to that of the multi-core optical fiber crosstalk measuring device provided in Embodiment 1, and the repeated parts will not be described again.

[0038] like Figure 3 As shown, the multi-core fiber crosstalk measurement method of the present invention includes: Step S100: Generate a pulsed light signal with predetermined parameters.

[0039] Step S200: Send a pulsed optical signal to any one of the multiple cores of the multi-core optical fiber.

[0040] Step S300: Receive the scattered light from another core of the multi-core optical fiber that is different from any one of the cores, wherein the scattered light is generated by crosstalk of the other core to the pulsed light signal.

[0041] Step S400: Output OTDR waveform based on scattered light.

[0042] Step S500: Obtain the first crosstalk value based on predetermined parameters.

[0043] Step S600: Obtain the second crosstalk value based on the first mathematical model and the OTDR waveform.

[0044] Step S700: Obtain the crosstalk attenuation value based on the second mathematical model, the first crosstalk value, and the second crosstalk value. The crosstalk attenuation value is used to determine the matching degree between any one core and another core.

[0045] In one example, the signal processing unit 5 can control the optical transmitter to generate a pulsed optical signal with predetermined parameters. The light source wavelength, pulse width, fiber length range, effective group refractive index of the core, and signal averaging frequency (or time) parameters of the pulsed optical signal can be predetermined. The single-core fiber in the FIFO fiber adapter 7, which corresponds to the position of any one of the multiple cores of the multi-core fiber 8, is plugged into the optical output port 2 as the reference core. The single-core fiber in the FIFO fiber adapter 7, which corresponds to the position of another core of the multi-core fiber 8 that is different from any one of the multiple cores, is plugged into the optical input port 3 as the core under test. The pulsed optical signal is sent to the reference core. Due to the crosstalk of the pulsed optical signal, the core under test generates scattered light. The signal processing unit 5 outputs an OTDR waveform based on the scattered light detected by the optical input port 3.

[0046] As one implementation method, the first mathematical model is: Where L1 represents the position of the first end of the other core, and L2 represents the position of the last end of the other core. This indicates the second crosstalk value, and P represents the numerical value of the OTDR waveform.

[0047] As one implementation method, the second mathematical model is: ,in, Indicates the first scrambling value. This represents the crosstalk attenuation value.

[0048] refer to Figure 4 An OTDR waveform of a chip under test, preferably, based on the above example, the crosstalk value of a reference chip is obtained based on predetermined parameters. The crosstalk value of the core under test is obtained by processing the OTDR waveform through the first mathematical model. The crosstalk value of the reference core is processed using a second mathematical model. Crosstalk value of the chip under test Obtain crosstalk attenuation value Crosstalk attenuation value Used to determine the matching degree between the reference core and the core under test. It is worth noting the crosstalk attenuation value. The larger the value, the smaller the crosstalk between the reference core and the core under test, and the higher the degree of matching.

[0049] The multi-core fiber crosstalk measurement method of the present invention completely isolates the backscattered light of the main core and directly measures the pure crosstalk signal.

[0050] According to some embodiments of the present invention, an electronic device is disclosed, the device including a memory storing computer-executable instructions and a processor configured to execute the instructions to implement a multi-core fiber crosstalk measurement method.

[0051] Figure 5 This is a hardware structure block diagram of an electronic device implementing an embodiment of the present invention.

[0052] like Figure 5 As shown, the electronic device 500 may include one or more processors 502, system control logic 508 connected to at least one of the processors 502, system memory 505 connected to the system control logic 508, non-volatile memory (NVM) 506 connected to the system control logic 508, and network interface 510 connected to the system control logic 508.

[0053] Processor 502 may include one or more single-core or multi-core processors. Processor 502 may include any combination of general-purpose processors and special-purpose processors (e.g., graphics processors, application processors, baseband processors, etc.). In embodiments of the invention, processor 502 may be configured to perform operations according to... Figure 3 The method for measuring crosstalk in multi-core optical fibers is shown.

[0054] In some embodiments, system control logic 508 may include any suitable interface controller to provide any suitable interface to at least one of the processors 502 and / or any suitable device or component communicating with system control logic 508.

[0055] In some embodiments, system control logic 508 may include one or more memory controllers to provide an interface to system memory 505. System memory 505 may be used to load and store data and / or instructions. In some embodiments, system memory 505 of electronic device 500 may include any suitable volatile memory, such as suitable dynamic random access memory (DRAM).

[0056] The NVM 506 may include one or more tangible, non-transitory computer-readable media for storing data and / or instructions. In some embodiments, the NVM 506 may include any suitable non-volatile memory such as flash memory and / or any suitable non-volatile storage device, such as at least one of an HDD (Hard Disk Drive), a CD (Compact Disc) drive, or a DVD (Digital Versatile Disc) drive.

[0057] The NVM 506 may include a portion of the storage resources on a device installed on electronic device 500, or it may be accessible by the device, but is not necessarily part of the device. For example, the NVM 506 may be accessed over a network via network interface 510.

[0058] Specifically, system memory 505 and NVM 506 may each include a temporary copy and a permanent copy of instruction 520, respectively. Instruction 520 may include, when executed by at least one of processors 502, causing electronic device 500 to perform, as Figure 3 The instructions for the method shown. In some embodiments, the instructions 520, hardware, firmware and / or their software components may additionally / alternatively be located in the system control logic 508, the network interface 510 and / or the processor 502.

[0059] Network interface 510 may include a transceiver for providing a radio interface to electronic device 500, thereby enabling communication with any other suitable device (e.g., front-end module, antenna, etc.) via one or more networks. In some embodiments, network interface 510 may be integrated into other components of electronic device 500. For example, network interface 510 may be integrated into at least one of processor 502, system memory 505, NVM 506, and firmware device (not shown) with instructions, wherein electronic device 500 implements [the desired functionality] when at least one of processor 502 executes the instructions. Figure 3 One or more embodiments of the various embodiments shown.

[0060] The network interface 510 may further include any suitable hardware and / or firmware to provide a multiple-input multiple-output radio interface. For example, the network interface 510 may be a network adapter, a wireless network adapter, a telephone modem, and / or a wireless modem.

[0061] In one embodiment, at least one of the processors 502 may be packaged together with one or more controllers for system control logic 508 to form a system-in-package (SiP). In another embodiment, at least one of the processors 502 may be integrated on the same die with one or more controllers for system control logic 508 to form a system-on-a-chip (SoC).

[0062] The electronic device 500 may further include an input / output (I / O) device 512 connected to the system control logic 508. The I / O device 512 may include a user interface enabling a user to interact with the electronic device 500; the peripheral component interface is designed to allow peripheral components to also interact with the electronic device 500. In some embodiments, the electronic device 500 may also include sensors for determining at least one type of environmental condition and location information related to the electronic device 500.

[0063] In some embodiments, I / O device 512 may include, but is not limited to, a display (e.g., a liquid crystal display, a touch screen display, etc.), a speaker, a microphone, one or more cameras (e.g., a still image camera and / or a video camera), a flashlight (e.g., a light-emitting diode flash), and a keyboard.

[0064] In some embodiments, the peripheral component interface may include, but is not limited to, a non-volatile memory port, an audio jack, and a power interface.

[0065] It is understood that the structures illustrated in the embodiments of the present invention do not constitute a specific limitation on the electronic device 500. In other embodiments of this application, the electronic device 500 may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0066] Program code can be applied to input instructions to perform the functions described in this invention and generate output information. The output information can be applied to one or more output devices in a known manner. For the purposes of this application, a system for processing instructions including processor 502 includes any system having a processor such as a digital signal processor (DSP), microcontroller, application-specific integrated circuit (ASIC), or microprocessor.

[0067] The program code can be implemented using a high-level procedural language or an object-oriented programming language to communicate with the processing system. Assembly language or machine language can also be used when needed. In fact, the mechanisms described in this invention are not limited to any particular programming language. In either case, the language can be a compiled language or an interpreted language.

[0068] According to one embodiment of the present invention, a computer-readable storage medium is also provided, wherein at least one computer instruction is stored in the computer-readable storage medium, the at least one instruction being loaded and executed by a processor to implement the aforementioned multi-core fiber crosstalk measurement method.

[0069] According to one embodiment of the present invention, a computer program product is also provided, the computer program product including computer instructions, which, when executed, implement the aforementioned multi-core fiber crosstalk measurement method.

[0070] The illustrative embodiments of the present invention include, but are not limited to, a method, apparatus, device, medium, and program product for measuring crosstalk in multi-core optical fibers.

[0071] Various aspects of the illustrative embodiments will be described using terminology commonly employed by those skilled in the art to convey the essence of their work to others skilled in the art. However, it will be apparent to those skilled in the art that some alternative embodiments will be practiced using some of the features described herein. Specific figures and configurations are set forth for purposes of explanation in order to provide a more thorough understanding of the illustrative embodiments. However, it will be apparent to those skilled in the art that alternative embodiments may be practiced without specific details. In some other instances, well-known features have been omitted or simplified herein to avoid obscuring the illustrative embodiments of the invention.

[0072] Furthermore, the various operations will be described as multiple separate operations in a manner most conducive to understanding the illustrative embodiments; however, the order of description should not be construed as implying that these operations must depend on the order of description, and many of these operations may be performed in parallel, concurrently, or simultaneously. Moreover, the order of the operations may also be rearranged. The process may be terminated when the described operations are completed, but may also include additional steps not included in the figures. The process may correspond to a method, function, procedure, subroutine, subroutine, etc.

[0073] References to phrases such as "an example," "in an example," "an embodiment," and "an implementation" in the specification indicate that the described embodiment may include specific features, structures, or properties; however, each embodiment may or may not necessarily include specific features, structures, or properties. Furthermore, these phrases are not necessarily directed at the same embodiment. Additionally, when specific features are described in conjunction with specific embodiments, the knowledge of those skilled in the art can influence the combination of these features with other embodiments, whether or not those embodiments are explicitly described.

[0074] Unless the context otherwise specifies, the terms “comprising,” “having,” and “including” are synonyms. The phrase “A and / or B” means “(A), (B), or (A and B).”

[0075] As used herein, the term "module" may refer to, as part of, or include: a memory (shared, dedicated, or grouped), an application-specific integrated circuit (ASIC), electronic circuitry and / or a processor (shared, dedicated, or grouped), combinational logic circuitry, and / or other suitable components that provide the said functionality for running one or more software or firmware programs.

[0076] In the accompanying drawings, some structural or methodological features may be shown in a specific arrangement and / or order. However, it should be understood that such a specific arrangement and / or order is not necessary. Rather, in some embodiments, these features may be illustrated in a manner and / or order different from that shown in the illustrative drawings. Furthermore, the inclusion of structural or methodological features in a particular drawing does not mean that all embodiments need to include such features; in some embodiments, these features may be omitted or may be combined with other features.

[0077] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0078] Similarly, it should be understood that, in order to simplify the invention and aid in understanding one or more of the various inventive aspects, features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof in the above description of exemplary embodiments of the invention. However, this disclosure should not be construed as reflecting an intention that the claimed invention requires more features than expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in fewer than all features of the single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the invention.

[0079] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature serving the same, equivalent, or similar purpose.

[0080] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

Claims

1. A multi-core optical fiber crosstalk measurement device, used to measure crosstalk between the cores of a multi-core optical fiber, characterized in that, include: An optical transmitter for generating a pulsed optical signal with predetermined parameters; An optical output port is connected to the optical transmitter and is used to send the pulsed optical signal to any one of the multiple cores of the multi-core optical fiber. An optical input port is provided for receiving scattered light generated from another core that is different from any one of the multiple cores. An optical receiver, connected to the optical input port, is used to detect the scattered light received by the optical input port; as well as A signal processing unit is configured to output an OTDR waveform based on the scattered light, and to obtain a crosstalk attenuation value between any one core and the other core based on the OTDR waveform and the predetermined parameters.

2. The multi-core fiber crosstalk measurement device according to claim 1, characterized in that, The signal processing unit is connected to the light emitter.

3. The multi-core fiber crosstalk measurement device according to claim 2, characterized in that, The signal processing unit controls the light transmitter to emit the pulsed light signal.

4. The multi-core fiber crosstalk measurement device according to claim 1, characterized in that, The multi-core fiber crosstalk measurement device also includes a display for displaying the OTDR waveform and the crosstalk attenuation value.

5. A method for measuring crosstalk in multi-core optical fibers, comprising measuring crosstalk between the cores of a multi-core optical fiber using the multi-core optical fiber crosstalk measuring device as described in claim 1, characterized in that, include: Generate a pulsed light signal with predetermined parameters; The pulsed optical signal is sent to any one of the multiple cores of the multi-core optical fiber; Receive scattered light from another core that is different from any one of the multiple cores, wherein the scattered light is generated by crosstalk of the pulsed light signal to the other core; The OTDR waveform is output based on the scattered light; The first crosstalk value is obtained based on the predetermined parameters; The second crosstalk value is obtained based on the first mathematical model and the OTDR waveform; Based on the second mathematical model, the first crosstalk value, and the second crosstalk value, a crosstalk attenuation value is obtained, which is used to determine the matching degree between any one core and the other core.

6. The method for measuring crosstalk in multi-core optical fibers according to claim 5, characterized in that, The first mathematical model is Wherein, L1 represents the position of the first end of the other core, and L2 represents the position of the last end of the other core. The value represents the second crosstalk value, and P represents the numerical value of the OTDR waveform.

7. The method for measuring crosstalk in multi-core optical fibers according to claim 5, characterized in that, The second mathematical model is , wherein Represents the first crosstalk value, the This represents the crosstalk attenuation value.

8. An electronic device, characterized in that, The device includes a memory storing computer-executable instructions and a processor configured to execute the instructions to implement the multi-core fiber crosstalk measurement method according to any one of claims 5-7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one computer instruction, which is loaded and executed by a processor to implement the multi-core fiber crosstalk measurement method as described in any one of claims 5-7.

10. A computer program product, characterized in that, The computer program product includes computer instructions, which, when executed, implement the multi-core fiber crosstalk measurement method as described in any one of claims 5-7.

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