All-optical signal processing method and system based on optical fiber nonlinear effect

Abstract

The invention is suitable for the technical field of all-optical signal processing, and provides an all-optical signal processing method and system based on an optical fiber nonlinear effect, and the method comprises the steps: receiving optical signals, and carrying out the coupling of the optical signals; the method comprises the following steps of: performing resonance enhancement on an optical signal by utilizing a resonant cavity, outputting an enhanced pump light signal, calculating conversion light generation efficiency by utilizing a coupling mode theory and a four-wave mixing theory, inputting the conversion light generation efficiency into a big database for matching, and outputting information of successful or failed enhancement of the optical signal. The all-optical signal processing function and the larger broadband are achieved through the nonlinear effect, the enhanced optical signal is automatically judged, and therefore whether the optical signal is successfully enhanced or not can be automatically recognized, and the problems that the optical signal processing effect is poor, and whether processing is successful or not cannot be automatically recognized are solved.

Description

Technical Field

[0001] This invention relates to the field of all-optical signal processing technology, specifically to an all-optical signal processing method and system based on fiber nonlinear effects. Background Technology

[0002] With the rapid development of science and technology and the arrival of the information age, information transmission has become increasingly important. As one of the many transmission media, optical fiber has irreplaceable advantages over other media. It has the characteristics of large transmission capacity, wide transmission bandwidth and strong anti-interference ability. However, due to the loss and dispersion in optical fiber, the development of optical fiber communication has been restricted. If a longer transmission distance is to be obtained, the power of optical fiber needs to be increased, which causes the nonlinear effect of optical fiber.

[0003] Although the glass material used in optical fibers has very weak nonlinearity, the small core size results in a very high internal field, and the long operating distance allows the nonlinear effects in the optical fiber to accumulate to a sufficient intensity, leading to severe interference with the signal and limitations on the system's transmission performance. The nonlinear effects of optical fibers include: scattering effects, self-phase modulation, cross-phase modulation, and four-wave mixing effects, among which cross-phase modulation and four-wave mixing effects have a more serious impact on the system.

[0004] In existing technologies, nonlinear effects in waveguide structures, high-Q resonant cavities, and multiple coupled resonant cavities are generally used to achieve all-optical signal processing. However, this approach suffers from problems such as poor integration, severely limited bandwidth, poor stability, and the inability to automatically determine whether the optical signal has been successfully enhanced as required. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an all-optical signal processing method and system based on the nonlinear effect of optical fiber, so as to solve the problems existing in the background technology.

[0006] This invention is implemented as follows: an all-optical signal processing method based on fiber nonlinear effects, the method comprising the following steps:

[0007] It receives optical signals and couples them together.

[0008] The optical signal is resonantly enhanced using a resonant cavity, and the enhanced pump optical signal is output.

[0009] The conversion light generation efficiency was calculated using coupled-mode theory and four-wave mixing theory.

[0010] The conversion light generation efficiency is input into a large database for matching. The large database stores standard values ​​for conversion light generation efficiency. When it is determined whether the conversion light generation efficiency is higher than the standard value, if the conversion light generation efficiency is higher than the standard value, the optical signal enhancement success information is output; otherwise, the optical signal enhancement failure information is output.

[0011] As a further aspect of the present invention: the step of receiving the optical signal and coupling the optical signal specifically includes:

[0012] Receives optical signals transmitted from the input branch;

[0013] The optical signal is coupled to another branch by using techniques that control the length of the coupling region and the coupling strength, and then coupled to the input branch.

[0014] Repeat the above steps once or more inside the resonant cavity.

[0015] As a further aspect of the present invention: the step of using a resonant cavity to resonate and enhance the optical signal, and outputting an enhanced pump optical signal, specifically includes:

[0016] Optical confinement of optical signals within the resonant cavity;

[0017] The nonlinear effects of low-power pump light are combined with the resonance effect to perform all-optical signal processing;

[0018] While ensuring that the resonant cavity does not leak, the enhanced pump light signal is output.

[0019] As a further aspect of the present invention: the calculation formula for calculating the conversion light generation efficiency using coupled-mode theory and four-wave mixing theory is: where P is the pump light power of the input device, γ is the nonlinear coefficient of the waveguide, Leff is the effective length of the coupling region of the coupler, and Fp is the intensity gain factor of the resonant cavity for the pump light.

[0020] As a further aspect of the present invention: 5. The step of inputting the conversion light generation efficiency into a large database for matching, wherein the large database stores a standard value for the conversion light generation efficiency, and determining whether the conversion light generation efficiency is higher than the standard value, outputting a successful light signal enhancement message when the conversion light generation efficiency is higher than the standard value, and outputting a failed light signal enhancement message otherwise, specifically includes:

[0021] Establish a large database of conversion light generation efficiency;

[0022] The steps involved in establishing a large database of conversion light generation efficiency include:

[0023] The generation efficiency of multiple converted lights output from resonant cavities with different numbers was collected;

[0024] Calculate the standard value of the conversion light generation efficiency output in each numbered resonant cavity, wherein the standard value of the conversion light generation efficiency is the average value of multiple conversion light generation efficiencies;

[0025] The conversion light generation efficiency standard corresponding to each numbered resonant cavity is stored in a large database.

[0026] The conversion light generation efficiency of multiple resonant cavities with a specific number is collected in real time, and the average value of the multiple conversion light generation efficiencies is calculated.

[0027] The average conversion light generation efficiency is marked with a number;

[0028] Input the average conversion light generation efficiency with numbered values ​​into the large database;

[0029] Data analysis was used to determine whether the average conversion light generation efficiency matched the conversion light generation efficiency standard.

[0030] Provided that the error does not exceed ±0.05, output a message indicating successful optical signal enhancement; otherwise, output a message indicating failed optical signal enhancement.

[0031] An all-optical signal processing system based on fiber nonlinear effects, the system comprising:

[0032] An optical signal coupling module is used to receive optical signals and couple them together.

[0033] The optical signal enhancement module is used to resonate and enhance the optical signal using a resonant cavity, and output the enhanced pump optical signal.

[0034] The conversion light generation efficiency generation module is used to calculate the conversion light generation efficiency using coupled-mode theory and four-wave mixing theory.

[0035] The matching module is used to input the conversion light generation efficiency into a large database for matching. The large database stores standard values ​​of conversion light generation efficiency. When it is determined whether the conversion light generation efficiency is higher than the standard value, if the conversion light generation efficiency is higher than the standard value, the module outputs a successful light signal enhancement message; otherwise, it outputs a failed light signal enhancement message.

[0036] As a further aspect of the present invention: the optical signal coupling module includes:

[0037] An optical signal receiving unit is used to receive optical signals transmitted from the input branch;

[0038] The coupling unit is used to couple an optical signal to another branch by controlling the length of the coupling region and the coupling strength, and then couple it to the input branch, repeating the above steps once or more in the resonant cavity.

[0039] As a further aspect of the present invention: the matching module includes:

[0040] The large database establishment unit is used to establish a large database for converting light generation efficiency.

[0041] The acquisition unit is used to acquire the conversion light generation efficiency of multiple resonant cavities with a certain number in real time, and to calculate the average value of the multiple conversion light generation efficiencies.

[0042] A marking unit is used to mark the average conversion light generation efficiency with a number;

[0043] The input unit is used to input the numbered average conversion light generation efficiency into a large database.

[0044] The matching unit uses data analysis to determine whether the average conversion light generation efficiency matches the conversion light generation efficiency standard.

[0045] The output unit is used to output information indicating successful optical signal enhancement, provided that the error does not exceed ±0.05; otherwise, it is used to output information indicating failed optical signal enhancement.

[0046] Compared with the prior art, the beneficial effects of the present invention are as follows: by using a resonant cavity to resonate and enhance the optical signal, and by using coupled-mode theory and four-wave mixing theory to calculate the conversion light generation efficiency, and inputting the conversion light generation efficiency into a large database for matching, the present invention outputs information on whether the optical signal enhancement is successful or not. This not only realizes the nonlinear effect to achieve all-optical signal processing function and a wider bandwidth, but also realizes the automatic judgment of the enhanced optical signal, thereby automatically identifying whether the optical signal enhancement is successful, solving the problems of poor optical signal processing effect and inability to automatically identify whether the processing is successful. Attached Figure Description

[0047] Figure 1 This is a flowchart of an all-optical signal processing method based on fiber nonlinear effects.

[0048] Figure 2 This is a flowchart illustrating an all-optical signal processing method based on fiber nonlinear effects, which utilizes a resonant cavity to resonate and enhance an optical signal, outputting an enhanced pump optical signal.

[0049] Figure 3 This is a schematic diagram of an all-optical signal processing system based on the nonlinear effect of optical fibers. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0051] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0052] like Figure 1 As shown, this embodiment of the invention provides an all-optical signal processing method based on fiber nonlinear effects, the method comprising the following steps:

[0053] S100 receives optical signals and couples them together;

[0054] S200 uses a resonant cavity to resonate and enhance the optical signal, and outputs an enhanced pump optical signal.

[0055] S300 uses coupled-mode theory and four-wave mixing theory to calculate the conversion light generation efficiency;

[0056] S400, the conversion light generation efficiency is input into a large database for matching. The large database stores a standard value for the conversion light generation efficiency. When it is determined whether the conversion light generation efficiency is higher than the standard value, if the conversion light generation efficiency is higher than the standard value, the optical signal enhancement success information is output; otherwise, the optical signal enhancement failure information is output.

[0057] In this embodiment of the invention, the calculation formula for calculating the conversion light generation efficiency using coupled-mode theory and four-wave mixing theory is as follows: Where P is the pump light power of the input device, γ is the nonlinear coefficient of the waveguide, Leff is the effective length of the coupling region of the coupler, and Fp is the intensity gain factor of the resonant cavity for the pump light.

[0058] In a preferred embodiment of the present invention, the step of receiving the optical signal and coupling the optical signal specifically includes:

[0059] S110 receives the optical signal transmitted from the input branch;

[0060] S120 uses techniques to control the length of the coupling region and the coupling strength to couple optical signals to another branch.

[0061] In this embodiment of the invention, the above steps are repeated once or more within the resonant cavity by coupling it to the input branch.

[0062] like Figure 2 As shown, in a preferred embodiment of the present invention, the step of using a resonant cavity to resonate and enhance the optical signal, and outputting an enhanced pump optical signal, specifically includes:

[0063] S210 optically confines the optical signal within the resonant cavity;

[0064] S220 combines the resonant effect to perform all-optical signal processing on the nonlinear effect of low-power pump light;

[0065] S230 outputs an enhanced pump light signal while ensuring no leakage in the resonant cavity.

[0066] In this embodiment of the invention, under lower pump light power, the resonant cavity can enhance various nonlinear effects, reduce the threshold, and improve efficiency.

[0067] As a preferred embodiment of the present invention, the step of inputting the converted light generation efficiency into a large database for matching, wherein the large database stores standard values ​​for the converted light generation efficiency, and determining whether the converted light generation efficiency is higher than the standard value, outputting a successful light signal enhancement message when the converted light generation efficiency is higher than the standard value, and outputting a failed light signal enhancement message otherwise, specifically includes:

[0068] S410, establish a large database of conversion light generation efficiency;

[0069] The steps involved in establishing a large database of conversion light generation efficiency include:

[0070] S4110, collects the generation efficiency of multiple converted lights output from resonant cavities with different numbers;

[0071] S4120, calculate the standard value of the conversion light generation efficiency output in each numbered resonant cavity, wherein the standard value of the conversion light generation efficiency is the average value of multiple conversion light generation efficiencies;

[0072] S4130 stores the conversion light generation efficiency standard corresponding to each numbered resonant cavity in a large database.

[0073] S420: Real-time acquisition of multiple conversion light generation efficiencies output from a resonant cavity with a specific number, and calculation of the average value of multiple conversion light generation efficiencies;

[0074] S430, the average conversion light generation efficiency is marked with a number;

[0075] S440 inputs the numbered average conversion light generation efficiency into the large database;

[0076] S450 uses data analysis to determine whether the average conversion light generation efficiency matches the conversion light generation efficiency standard.

[0077] S460, provided that the error does not exceed ±0.05, outputs a message indicating successful optical signal enhancement; otherwise, it outputs a message indicating failed optical signal enhancement.

[0078] In this embodiment of the invention, the enhanced optical signal can be automatically judged, thereby automatically identifying whether the optical signal enhancement was successful.

[0079] Benru Figure 3 As shown, an all-optical signal processing system based on fiber nonlinear effects includes:

[0080] The optical signal coupling module 100 is used to receive optical signals and couple them.

[0081] The optical signal enhancement module 200 is used to resonate and enhance the optical signal using a resonant cavity, and output the enhanced pump optical signal.

[0082] The conversion light generation efficiency generation module 300 is used to calculate the conversion light generation efficiency using coupled-mode theory and four-wave mixing theory.

[0083] The matching module 400 is used to input the conversion light generation efficiency into a large database for matching. The large database stores the standard value of the conversion light generation efficiency. When it is determined whether the conversion light generation efficiency is higher than the standard value, if the conversion light generation efficiency is higher than the standard value, the optical signal enhancement success information is output; otherwise, the optical signal enhancement failure information is output.

[0084] In this embodiment of the invention, the optical signal coupling module 100 is an optical signal coupler, and the optical signal enhancement module 200 includes a ring resonant cavity and an optical output port. After the all-optical signal in the optical signal coupler is incident into the ring resonant cavity, it is emitted out from the optical output port.

[0085] In a preferred embodiment of the present invention, the optical signal coupling module 100 includes:

[0086] The optical signal receiving unit 101 is used to receive the optical signal transmitted from the input branch;

[0087] The coupling unit 102 is used to couple an optical signal to another branch by using techniques that control the length of the coupling region and the coupling strength, and then couple it to the input branch, repeating the above steps once or more in the resonant cavity.

[0088] In this embodiment of the invention, the optical signal receiving unit 101 includes a parameter setting unit and a reflector. The parameter setting unit is used to set preset parameters so that the optical signal is coupled into a linear decoupler, and the reflector is used to reflect the all-optical signal.

[0089] In a preferred embodiment of the present invention, the matching module 400 includes:

[0090] The large database establishment unit 401 is used to establish a large database for converting light generation efficiency;

[0091] The acquisition unit 402 is used to acquire the conversion light generation efficiency of multiple converted light outputs of a certain numbered resonant cavity in real time, and calculate the average value of the multiple conversion light generation efficiencies.

[0092] The marking unit 403 is used to mark the average conversion light generation efficiency with a number;

[0093] Input unit 404 is used to input the numbered average conversion light generation efficiency into a large database;

[0094] Matching unit 405 uses data analysis to determine whether the average conversion light generation efficiency matches the conversion light generation efficiency standard.

[0095] The output unit 406 is used to output information indicating successful optical signal enhancement, provided that the error does not exceed ±0.05; otherwise, it is used to output information indicating failed optical signal enhancement.

[0096] In this embodiment of the invention, the big data establishment unit 401, the acquisition unit 402, the marking unit 403, the input unit 404, the matching unit 405, and the output unit 406 are communicatively connected, and can automatically judge the enhanced optical signal, thereby automatically identifying whether the optical signal has been successfully enhanced.

[0097] In summary, by utilizing a resonant cavity to enhance the optical signal and calculating the conversion light generation efficiency using coupled-mode theory and four-wave mixing theory, and then inputting the conversion light generation efficiency into a large database for matching, the system outputs information on whether the optical signal enhancement was successful or not. This approach not only achieves all-optical signal processing functionality and greater bandwidth through nonlinear effects, but also enables automatic judgment of the enhanced optical signal, thus automatically identifying whether the optical signal enhancement was successful. This solves the problems of poor optical signal processing performance and the inability to automatically identify whether the processing was successful.

[0098] It should be understood that although the steps in the flowcharts of the various embodiments of the present invention are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the various embodiments may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0099] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0100] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the disclosure in the specification and embodiments. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

Claims

1. An all-optical signal processing method based on fiber nonlinear effects, characterized in that, The method includes the following steps: It receives optical signals and couples them together. The optical signal is resonantly enhanced using a resonant cavity, and the enhanced pump optical signal is output. The conversion light generation efficiency was calculated using coupled-mode theory and four-wave mixing theory. The conversion light generation efficiency is input into a large database for matching. The large database stores standard values ​​for conversion light generation efficiency. When it is determined whether the conversion light generation efficiency is higher than the standard value, if the conversion light generation efficiency is higher than the standard value, the optical signal enhancement success information is output; otherwise, the optical signal enhancement failure information is output.

2. The all-optical signal processing method based on fiber nonlinear effects according to claim 1, characterized in that, The step of receiving and coupling the optical signal specifically includes: Receives optical signals transmitted from the input branch; The optical signal is coupled to another branch by using techniques that control the length of the coupling region and the coupling strength, and then coupled to the input branch. Repeat the above steps once or more inside the resonant cavity.

3. The all-optical signal processing method based on fiber nonlinear effects according to claim 2, characterized in that, The step of using a resonant cavity to resonate and enhance the optical signal, and outputting an enhanced pump optical signal, specifically includes: Optical confinement of optical signals within the resonant cavity; The nonlinear effects of low-power pump light are combined with the resonance effect to perform all-optical signal processing; While ensuring that the resonant cavity does not leak, the enhanced pump light signal is output.

4. The all-optical signal processing method based on fiber nonlinear effects according to claim 3, characterized in that, The formula for calculating the conversion light generation efficiency using coupled-mode theory and four-wave mixing theory is as follows: Where P is the pump light power of the input device, γ is the nonlinear coefficient of the waveguide, Leff is the effective length of the coupling region of the coupler, and Fp is the intensity gain factor of the resonant cavity for the pump light.

5. The all-optical signal processing method based on fiber nonlinear effects according to claim 4, characterized in that, The step of inputting the converted light generation efficiency into a large database for matching, wherein the large database stores standard values ​​for the converted light generation efficiency, and determining whether the converted light generation efficiency is higher than the standard value, outputting a successful light signal enhancement message when the converted light generation efficiency is higher than the standard value, and outputting a failed light signal enhancement message otherwise, specifically includes: Establish a large database of conversion light generation efficiency; The steps involved in establishing a large database of conversion light generation efficiency include: The generation efficiency of multiple converted lights output from resonant cavities with different numbers was collected; Calculate the standard value of the conversion light generation efficiency output in each numbered resonant cavity, wherein the standard value of the conversion light generation efficiency is the average value of multiple conversion light generation efficiencies; The conversion light generation efficiency standard corresponding to each numbered resonant cavity is stored in a large database. The conversion light generation efficiency of multiple resonant cavities with a specific number is collected in real time, and the average value of the multiple conversion light generation efficiencies is calculated. The average conversion light generation efficiency is marked with a number; Input the average conversion light generation efficiency with numbered values ​​into the large database; Data analysis was used to determine whether the average conversion light generation efficiency matched the conversion light generation efficiency standard. Provided that the error does not exceed ±0.05, output a message indicating successful optical signal enhancement; otherwise, output a message indicating failed optical signal enhancement.

6. An all-optical signal processing system based on fiber nonlinear effects, characterized in that, The system includes: An optical signal coupling module is used to receive optical signals and couple them together. The optical signal enhancement module is used to resonate and enhance the optical signal using a resonant cavity, and output the enhanced pump optical signal. The conversion light generation efficiency generation module is used to calculate the conversion light generation efficiency using coupled-mode theory and four-wave mixing theory. The matching module is used to input the conversion light generation efficiency into a large database for matching. The large database stores standard values ​​of conversion light generation efficiency. When it is determined whether the conversion light generation efficiency is higher than the standard value, if the conversion light generation efficiency is higher than the standard value, the module outputs a successful light signal enhancement message; otherwise, it outputs a failed light signal enhancement message.

7. The all-optical signal processing system based on fiber nonlinear effects according to claim 6, characterized in that, The optical signal coupling module includes: An optical signal receiving unit is used to receive optical signals transmitted from the input branch; The coupling unit is used to couple an optical signal to another branch by controlling the length of the coupling region and the coupling strength, and then couple it to the input branch, repeating the above steps once or more in the resonant cavity.

8. The all-optical signal processing system based on fiber nonlinear effects according to claim 7, characterized in that, The matching module includes: The large database establishment unit is used to establish a large database for converting light generation efficiency. The acquisition unit is used to acquire the conversion light generation efficiency of multiple resonant cavities with a certain number in real time, and to calculate the average value of the multiple conversion light generation efficiencies. A marking unit is used to mark the average conversion light generation efficiency with a number; The input unit is used to input the numbered average conversion light generation efficiency into a large database. The matching unit uses data analysis to determine whether the average conversion light generation efficiency matches the conversion light generation efficiency standard. The output unit is used to output information indicating successful optical signal enhancement, provided that the error does not exceed ±0.05; otherwise, it is used to output information indicating failed optical signal enhancement.

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