All-optical nonlinear activator based on double-beam cavity field regulation and control and production method thereof

Abstract

The invention provides an all-optical nonlinear activator based on double-beam cavity field regulation and control, which can be applied to the technical field of optical calculation. The activator comprises an input end, an optical microcavity and an output end, and the input end is used for providing an input light beam; the optical microcavity is used for generating resonance and exciting and enhancing an optical nonlinear effect; and the output end is used for outputting the optical signal after nonlinear regulation and control. Non-linear regulation and control are carried out on a light field in the optical microcavity or non-linear regulation and control are carried out on a transmission spectrum of the light field of the optical microcavity through the double-coherent light beams carrying the phase difference, so that non-linear mapping between the light intensity of input light and the light intensity of output light, namely a light-light self-modulation process, is formed. And an effective nonlinear operator is provided for all-optical calculation, so that the convergence speed of network training and reasoning is accelerated, and the recognition accuracy of the model in different applications is improved. The invention further provides a production method of the all-optical nonlinear activator based on double-beam cavity field regulation and control.

Description

Technical Field

[0001] The present invention relates to the field of optical computing technology, and in particular to an all-optical nonlinear activator based on dual-beam cavity field regulation and a generation method thereof. Background Art

[0002] Artificial intelligence algorithms of different architectures are composed of a variety of basic computing units connected in a variety of ways. The most commonly used basic operators are linear matrix calculations of matrix-vector multiplication, convolution calculations, nonlinear activation functions, pooling, etc. The goal of optical computing and optical neural networks is to use photons as physical carriers to construct basic computing units in artificial intelligence algorithms, giving full play to their high speed, low power consumption, low latency, high throughput and other characteristics, thereby realizing the next generation of intelligent computing architecture with high computing power and low power consumption.

[0003] Among them, the nonlinear activation function is one of the indispensable operators in the artificial intelligence algorithm, which enables it to have a wide range of applications, accelerate the convergence speed of network training and reasoning, and improve the recognition accuracy. For artificial intelligence algorithms that do not contain any nonlinear activation functions, even if there are multiple layers of linear transformations physically, the result of the multiple linear matrix multiplications completed is still a linear calculation process, and its effective calculation is only equivalent to a single-layer linear matrix calculation. For all-optical computing and all-optical neural networks, the optical implementation of nonlinear activators is also essential. However, in the currently reported research on optical neural network architectures, nonlinear functions usually rely on optical-electrical-optical conversion, that is, after the optical signal is converted into an electrical signal by a photodetector, it is electrically nonlinearly mapped through methods such as a central processor, a digital signal processing chip, and an analog electronic circuit, and then reloaded onto an electro-optical modulator to achieve nonlinear regulation of the optical signal. This requires the additional introduction of digital-to-analog / analog-to-digital converters, optoelectronic / electro-optical converters, and other peripheral drive circuits, which will undoubtedly increase the complexity, latency, and power consumption of the system, and the data bandwidth is still limited by electronic components and cannot support nonlinear regulation of high-speed optical signals. Therefore, how to realize an all-optical nonlinear activator with low power consumption, low nonlinear generation threshold, and support for high-speed signal transmission has become one of the most challenging problems in optical neural network research. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In order to solve the above problems existing in the nonlinear function of the prior art, the embodiment of the present invention provides an all-optical nonlinear activator based on dual-beam cavity field control and a method for generating the same, which nonlinearly controls the light field in the optical microcavity or the transmission spectrum of the optical microcavity light field by carrying dual coherent light beams with phase difference, thereby forming a nonlinear mapping between the input light and the output light intensity, i.e., a light-light self-modulation process. It provides an effective nonlinear operator for all-optical computing, thereby accelerating the convergence speed of network training and reasoning, and improving the recognition accuracy of the model in different applications.

[0006] (II) Technical solution

[0007] In view of the above problems, an embodiment of the present invention provides an all-optical nonlinear activator based on dual-beam cavity field control and a method for producing the same.

[0008] According to a first aspect of the present invention, there is provided an all-optical nonlinear activator based on dual-beam cavity field regulation, comprising: an input end, an optical microcavity and an output end, wherein the input end is used to provide an input light beam; the optical microcavity is used to generate resonance, excite and enhance optical nonlinear effects; and the output end is used to output an optical signal after nonlinear regulation.

[0009] In some exemplary embodiments, an input light beam enters an optical microcavity, dual coherent light beams are generated in the optical microcavity, and finally coupled into an output end.

[0010] In some exemplary embodiments, it also includes: a beam splitter with an adjustable splitting ratio and an optical phase shifter, wherein the beam splitter with an adjustable splitting ratio is used to split the input light beam into a first coherent light beam and a second coherent light beam; the optical phase shifter is used to perform phase control on the first coherent light beam to obtain a first controlled light beam, wherein there is a phase difference between the first controlled light beam and the second coherent light beam.

[0011] In some exemplary embodiments, the first regulated light beam and the second coherent light beam enter the optical microcavity and are finally coupled into the output end.

[0012] In some exemplary embodiments, it also includes: an optical beam combiner, wherein the second coherent light beam first enters the optical microcavity and then enters the optical beam combiner together with the first regulated light beam, and finally reaches the output end.

[0013] In some exemplary embodiments, at least one of the following features is included: the type of the optical microcavity includes one of a Fabry-Perot microcavity, a photonic crystal microcavity, or a whispering gallery mode microcavity; the preparation of the optical microcavity includes one of forming based on an optoelectronic integration platform or based on high-temperature melting and cooling of a tapered optical fiber; the structure of the optical microcavity includes one of an all-through type or an up-and-down path type.

[0014] In some exemplary embodiments, the structure of the optical microcavity includes one of a single microcavity, a plurality of microcavities connected in series, a plurality of microcavities connected in parallel, or a microcavity-in-a-microcavity.

[0015] According to a second aspect of the present invention, there is provided a method for producing an all-optical nonlinear activator based on dual-beam cavity field regulation as described above, characterized in that the method comprises: feeding an input light beam; performing nonlinear regulation on the input light beam to obtain an output light beam; detecting the output light beam, and obtaining a nonlinear function based on a nonlinear mapping corresponding to the light intensities of the input light beam and the output light beam.

[0016] In some exemplary embodiments, nonlinear regulation of input light includes: splitting the input light beam into a first coherent light beam and a second coherent light beam by a beam splitter with an adjustable splitting ratio; regulating the first coherent light beam by an optical phase shifter to obtain a first regulated light beam, wherein there is a phase difference between the first regulated light beam and the second coherent light beam; the first regulated light beam and the second coherent light beam enter the optical microcavity and resonate and regulate the light field in the cavity to obtain an output light beam.

[0017] In some exemplary embodiments, nonlinear regulation of input light includes: splitting the input light beam into a first coherent light beam and a second coherent light beam by a beam splitter with an adjustable splitting ratio; regulating the first coherent light beam through an optical phase shifter, and regulating the light field in the cavity to obtain a first regulated light beam, wherein there is a phase difference between the first regulated light beam and the second coherent light beam; the second coherent light beam enters the optical microcavity and resonates, and then is combined with the first regulated light beam at an optical combiner to obtain an output light beam.

[0018] In some exemplary embodiments, nonlinear regulation of input light includes: the input light beam enters an optical microcavity, generating a first light beam and a second light beam in the optical microcavity, wherein there is a phase difference between the first light beam and the second light beam; the first light beam and the second light beam resonate in the optical microcavity and regulate the light field in the cavity to obtain an output light beam.

[0019] In some exemplary embodiments, the type and parameters of the nonlinear function are related to the phase difference, the wavelength of the input light beam and the resonant wavelength difference, and the structure of the optical microcavity.

[0020] (III) Beneficial effects

[0021] It can be seen from the above technical solutions that the all-optical nonlinear activator based on dual-beam cavity field control and the method for generating the same provided by the embodiments of the present invention have at least one of the following beneficial effects:

[0022] (1) The optical field in the optical microcavity can be nonlinearly controlled by using a dual coherent light beam with a phase difference, or the transmission spectrum of the optical microcavity light field can be nonlinearly controlled, thereby forming a nonlinear mapping between the input light and the output light intensity, that is, a light-to-light self-modulation process.

[0023] (2) It can realize an all-optical nonlinear activator with low power consumption, low nonlinear generation threshold, and support for high-speed signal transmission, providing an effective nonlinear operator for all-optical computing, thereby accelerating the convergence speed of network training and reasoning, and improving the recognition accuracy of the model in different applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above contents and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0025] Figure 1 The schematic diagram shows the structure of the first all-optical nonlinear activator based on dual-beam cavity field control according to an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of a process flow of a first method for generating an all-optical nonlinear activator based on dual-beam cavity field control according to an embodiment of the present invention is shown;

[0027] Figure 3 The schematic diagram shows the structure of a second all-optical nonlinear activator based on dual-beam cavity field control according to an embodiment of the present invention;

[0028] Figure 4 A schematic diagram of a process flow of a second method for generating an all-optical nonlinear activator based on dual-beam cavity field control according to an embodiment of the present invention is shown;

[0029] Figure 5 A schematic diagram of the structure of a third all-optical nonlinear activator based on dual-beam cavity field control according to an embodiment of the present invention is shown; and

[0030] Figure 6 The flowchart of the third method for generating an all-optical nonlinear activator based on dual-beam cavity field control according to an embodiment of the present invention is schematically shown.

[0031] Reference numerals:

[0032] 1-input end; 2-beam splitter with adjustable splitting ratio; 3-optical microcavity; 4-optical phase shifter; 5-optical beam combiner; 6-output end. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Figure 1 The structure diagram of the first all-optical nonlinear activator based on dual-beam cavity field control according to an embodiment of the present invention is schematically shown.

[0035] like Figure 1 As shown, the first all-optical nonlinear activator based on dual-beam cavity field regulation according to an embodiment of the present invention includes: an input end 1, an optical microcavity 3 and an output end 6, wherein the input end 1 is used to provide an input light beam; the optical microcavity 3 is used to generate resonance, excite and enhance the optical nonlinear effect; and the output end 6 is used to output an optical signal after nonlinear regulation.

[0036] In the embodiment of the present invention, an input light beam enters the optical microcavity 3 , generates a dual coherent light beam in the optical microcavity 3 , and finally couples into the output end 6 .

[0037] In some exemplary embodiments, the type of optical microcavity 3 includes one of a Fabry-Perot microcavity, a photonic crystal microcavity, or a whispering gallery mode microcavity. Among them, the Fabry-Perot (FP) microcavity has the advantages of simple structure and easy preparation, and is suitable for basic resonance and enhancement of the light field; the photonic crystal microcavity uses the periodic structure of the photonic crystal to achieve precise control of the light field, and has a high quality factor and a small mode volume; the whispering gallery mode (WGM) microcavity uses the principle of total reflection of light to form a stable resonance mode on the inner wall of the microcavity, and has a high Q value and a narrow line width.

[0038] The optical microcavity 3 can be prepared in a variety of ways, and can be implemented on an optoelectronic integrated platform, such as a silicon-based platform, a silicon nitride platform, or a silicon dioxide platform on an insulating substrate; it can also be formed by high-temperature melting and cooling of a tapered optical fiber. These preparation processes enable the optical microcavity 3 to be flexibly integrated into various optical systems.

[0039] In addition, the structural design of the optical microcavity 3 is also extremely flexible. It can be directly composed of a single microcavity to achieve simple light field control; it can also be composed of multiple microcavities in series or in parallel to achieve more complex light field control and enhancement effects; it can even adopt a nested structure of microcavities embedded in microcavities to further expand its functions and application range. The structure of a single optical microcavity 3 can be an all-through type, that is, a single-input single-output structure; it can also be an up-down path type, that is, a dual-input dual-output structure.

[0040] The structural design of the all-optical nonlinear activator is flexible. The type of optical microcavity, preparation process and structural parameters can be adjusted and optimized according to actual needs. This makes the activator adaptable to different application scenarios and needs.

[0041] Figure 2 The flowchart of the first method for generating an all-optical nonlinear activator based on dual-beam cavity field control according to an embodiment of the present invention is schematically shown.

[0042] like Figure 2 As shown, a first method for generating an all-optical nonlinear activator based on dual-beam cavity field control according to an embodiment of the present invention includes steps S110 to S140.

[0043] In step S110 , an input light beam is fed.

[0044] In step S120 , the input light beam enters the optical microcavity 3 , and a first light beam and a second light beam are generated in the optical microcavity 3 , wherein there is a phase difference between the first light beam and the second light beam.

[0045] In step S130, the first light beam and the second light beam resonate in the optical microcavity 3 and regulate the intracavity light field to obtain an output light beam.

[0046] In step S140, the output light beam is detected, and a nonlinear function is obtained based on a nonlinear mapping corresponding to the light intensities of the input light beam and the output light beam.

[0047] Among them, step S120 and step S130 are processes of nonlinear regulation to obtain the output light beam, and the type and parameters of the nonlinear function are related to the phase difference, the wavelength and resonant wavelength difference of the input light beam and the structure of the optical microcavity 3 .

[0048] For example, input light P in Directly coupled into the optical microcavity 3, due to the combined structure of the optical microcavity 3 can be nested to generate double light beams, and the two light beams have a certain phase difference φ, they resonate in the microcavity and regulate the light field in the cavity, realizing nonlinear regulation of the light field in the cavity. Finally, the output light P out It is output from the output terminal 6, and the nonlinear mapping relationship between the input and output light beams is detected.

[0049] Figure 3 The structure diagram of the second all-optical nonlinear activator based on dual-beam cavity field control according to an embodiment of the present invention is schematically shown.

[0050] like Figure 3 As shown in FIG. 1 , the second all-optical nonlinear activator based on dual-beam cavity field control according to an embodiment of the present invention is Figure 1Based on the first activator shown, it also includes: a beam splitter 2 with an adjustable splitting ratio and an optical phase shifter 4, wherein the beam splitter 2 with an adjustable splitting ratio is used to split the input light beam into a first coherent light beam and a second coherent light beam; the optical phase shifter 4 is used to perform phase control on the first coherent light beam to obtain a first controlled light beam, wherein there is a phase difference between the first controlled light beam and the second coherent light beam. The first controlled light beam and the second coherent light beam enter the optical microcavity 3 and are finally coupled into the output end 6.

[0051] Figure 4 The flowchart of the second method for generating an all-optical nonlinear activator based on dual-beam cavity field control according to an embodiment of the present invention is schematically shown.

[0052] like Figure 4 As shown, the second method for producing an all-optical nonlinear activator based on dual-beam cavity field control according to an embodiment of the present invention includes steps S210 to S250.

[0053] In step S210 , an input light beam is fed.

[0054] In step S220, the input light beam is split into a first coherent light beam and a second coherent light beam by a beam splitter 2 with an adjustable splitting ratio.

[0055] In step S230, the first coherent light beam is modulated by the optical phase shifter 4 to obtain a first modulated light beam, wherein there is a phase difference between the first modulated light beam and the second coherent light beam.

[0056] In step S240, the first regulated light beam and the second coherent light beam enter the optical microcavity 3 and resonate and regulate the light field in the cavity to obtain an output light beam.

[0057] In step S250, the output light beam is detected, and a nonlinear function is obtained based on a nonlinear mapping corresponding to the light intensities of the input light beam and the output light beam.

[0058] Among them, step S220 to step S240 are nonlinear regulation to obtain the process of output light beam, and the type and parameters of the nonlinear function are related to the phase difference, the wavelength and resonant wavelength difference of the input light beam and the structure of the optical microcavity 3.

[0059] For example, a Fabry-Perot microcavity is used as the optical microcavity 3. The light source coupled to the input end 1 is divided into two coherent lights after passing through a beam splitter 2 with an adjustable splitting ratio. One of the light beams (2b) is regulated by an optical phase shifter 4 to form a specific phase difference φ with the other light beam. Then, both coherent lights enter the Fabry-Perot microcavity and resonate. Finally, the output light P outOutput from the output port 6. Due to the resonant characteristics of the Fabry-Perot microcavity, the two coherent light beams resonate and interfere with each other in the microcavity. At this time, the light field in the cavity is modulated and a nonlinear effect is generated. By adjusting the splitting ratio, phase difference, and structural parameters of the microcavity (such as cavity length, reflectivity, etc.), the type and intensity of the nonlinear effect can be flexibly controlled. Finally, after being combined by the optical combiner 5, the output light P out Output from the output terminal 6. By detecting the output light P out By changing the light intensity, the nonlinear mapping relationship between the input and output light beams can be obtained.

[0060] The test was carried out by selecting different input light intensities and phase differences. The experimental results show that when the input light intensity and phase difference vary within a certain range, there is an obvious nonlinear mapping relationship between the output light intensity and the input light intensity. By adjusting the splitting ratio and the structural parameters of the microcavity, the type and intensity of the nonlinear effect can be further optimized. In addition, the all-optical nonlinear activator has high stability and repeatability, which can meet the needs of practical applications.

[0061] Figure 5 A schematic diagram of the structure of a third all-optical nonlinear activator based on dual-beam cavity field control according to an embodiment of the present invention is shown.

[0062] like Figure 5 As shown in FIG. 1 , the third all-optical nonlinear activator based on dual-beam cavity field control according to an embodiment of the present invention is Figure 3 On the basis of the second activator shown, it also includes: an optical beam combiner 5, wherein the second coherent light beam first enters the optical microcavity 3 and then enters the optical beam combiner 5 together with the first regulated light beam, and finally reaches the output end 6.

[0063] Figure 6 The flowchart of the third method for generating an all-optical nonlinear activator based on dual-beam cavity field control according to an embodiment of the present invention is schematically shown.

[0064] like Figure 6 As shown, a third method for producing an all-optical nonlinear activator based on dual-beam cavity field control according to an embodiment of the present invention includes steps S310 to S350.

[0065] In step S310 , an input light beam is fed.

[0066] In step S320, the input light beam is split into a first coherent light beam and a second coherent light beam by a beam splitter 2 with an adjustable splitting ratio.

[0067] In step S330, the first coherent light beam is modulated by the optical phase shifter 4, and the light field in the cavity is modulated to obtain a first modulated light beam, wherein there is a phase difference between the first modulated light beam and the second coherent light beam.

[0068] In step S340, the second coherent light beam enters the optical microcavity 3 and resonates before being combined with the first regulated light beam at the optical combiner 5 to obtain an output light beam.

[0069] In step S350, the output light beam is detected, and a nonlinear function is obtained based on a nonlinear mapping corresponding to the light intensities of the input light beam and the output light beam.

[0070] Among them, step S320 to step S340 are nonlinear regulation to obtain the process of output light beam, and the type and parameters of the nonlinear function are related to the phase difference, the wavelength and resonant wavelength difference of the input light beam and the structure of the optical microcavity 3.

[0071] For example, a photonic crystal microcavity is used as the optical microcavity 3. The light source coupled at the input end 1 is divided into two coherent lights after passing through a beam splitter 2 with an adjustable splitting ratio. One of the light beams carries a phase difference φ after being regulated by an optical phase shifter 4. After the other light beam enters the photonic crystal microcavity to resonate and produce a nonlinear effect, the two coherent lights are combined at an optical combiner 5 to output light P out Output from output terminal 6.

[0072] The all-optical nonlinear activator according to the embodiment of the present invention has significant effects and advantages, which are mainly reflected in the following aspects: the nonlinear effect is significant. Due to the use of optical microcavity and phase control technology, the all-optical nonlinear activator can achieve significant nonlinear control of the light field. By adjusting the splitting ratio, phase difference and structural parameters of the microcavity, the type and intensity of the nonlinear effect can be flexibly controlled. This makes the activator have broad application prospects in the fields of optical neural networks, optical computing, etc.; low power consumption. Compared with traditional nonlinear activators, the all-optical nonlinear activator does not require additional electronic devices to produce nonlinear effects. Therefore, its power consumption is greatly reduced, which is conducive to the realization of efficient and energy-saving optical systems; fast response speed. Since the propagation speed of light in the microcavity is very fast, the response speed of the all-optical nonlinear activator is also very fast. This enables it to quickly process input signals and output nonlinearly controlled optical signals to meet the needs of high-speed optical computing.

[0073] The embodiments of the present invention are described above. However, these embodiments are only for the purpose of illustration, and are not intended to limit the scope of the present invention. Although each embodiment is described above, it does not mean that the measures in each embodiment cannot be used in combination advantageously. Without departing from the scope of the present invention, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present invention.

Claims

1. An all-optical nonlinear activator based on dual-beam cavity field control, characterized in that: include: Input end, optical microcavity and output end, Wherein, the input end is used to provide an input light beam; The optical microcavity is used to generate resonance, excite and enhance optical nonlinear effects; and The output end is used to output the optical signal after nonlinear regulation.

2. The all-optical nonlinear activator based on dual-beam cavity field control according to claim 1, characterized in that: The input light beam enters the optical microcavity, generates a dual coherent light beam in the optical microcavity, and finally couples into the output end.

3. The all-optical nonlinear activator based on dual-beam cavity field control according to claim 1, characterized in that: Also includes: Beam splitters and optical phase shifters with adjustable splitting ratio, Wherein, the beam splitter with adjustable splitting ratio is used to split the input light beam into a first coherent light beam and a second coherent light beam; The optical phase shifter is used to perform phase control on the first coherent light beam to obtain a first controlled light beam, wherein there is a phase difference between the first controlled light beam and the second coherent light beam.

4. The all-optical nonlinear activator based on dual-beam cavity field control according to claim 3, characterized in that: The first regulated light beam and the second coherent light beam enter the optical microcavity and are finally coupled into the output end.

5. The all-optical nonlinear activator based on dual-beam cavity field control according to claim 3, characterized in that: Also includes: Optical beam combiner, Among them, the second coherent light beam first enters the optical microcavity and then enters the optical beam combiner together with the first regulated light beam, and finally reaches the output end.

6. The all-optical nonlinear activator based on dual-beam cavity field control according to claim 1, characterized in that: Includes at least one of the following features: The type of the optical microcavity includes one of a Fabry-Perot microcavity, a photonic crystal microcavity or a whispering gallery mode microcavity; The preparation of the optical microcavity includes one of forming based on an optoelectronic integrated platform or based on high-temperature melting and cooling of a tapered optical fiber; The structure of the optical microcavity includes one of an all-through type and an up-down path type.

7. The all-optical nonlinear activator based on dual-beam cavity field control according to claim 1, characterized in that: The structure of the optical microcavity includes a single microcavity, a plurality of microcavities connected in series, a plurality of microcavities connected in parallel, or a microcavity embedded in a microcavity.

8. A method for producing an all-optical nonlinear activator based on dual-beam cavity field control according to any one of claims 1 to 7, characterized in that: The method comprises: Feed the input beam; Performing nonlinear control on the input light beam to obtain an output light beam; The output light beam is detected, and a nonlinear function is obtained based on a nonlinear mapping corresponding to the light intensities of the input light beam and the output light beam.

9. The method according to claim 8, characterized in that: The nonlinearly regulating the input light comprises: Splitting the input light beam into a first coherent light beam and a second coherent light beam by a beam splitter with an adjustable splitting ratio; The first coherent light beam is regulated by an optical phase shifter to obtain a first regulated light beam, wherein there is a phase difference between the first regulated light beam and the second coherent light beam; The first regulated light beam and the second coherent light beam enter the optical microcavity and resonate and regulate the light field in the cavity to obtain an output light beam; or The nonlinearly regulating the input light comprises: Splitting the input light beam into a first coherent light beam and a second coherent light beam by a beam splitter with an adjustable splitting ratio; The first coherent light beam is regulated by an optical phase shifter, and the light field in the cavity is regulated to obtain a first regulated light beam, wherein there is a phase difference between the first regulated light beam and the second coherent light beam; The second coherent light beam enters the optical microcavity and resonates, and then is combined with the first regulated light beam at an optical combiner to obtain an output light beam; or The nonlinearly regulating the input light comprises: The input light beam enters the optical microcavity, and generates a first light beam and a second light beam in the optical microcavity, wherein there is a phase difference between the first light beam and the second light beam; The first light beam and the second light beam resonate in the optical microcavity and regulate the light field in the cavity to obtain an output light beam.

10. The method according to claim 8, characterized in that: The type and parameters of the nonlinear function are related to the phase difference, the wavelength of the input light beam and the resonant wavelength difference, and the structure of the optical microcavity.

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