Coherent Ising machine based on on-chip whispering-gallery-mode optical microcavity

Abstract

The present invention provides a coherent Ising machine based on an on-chip whispering gallery mode optical microcavity, which mainly utilizes an optical microcavity in which a second laser processing device (nonlinear crystal) is integrated, to realize an on-chip structure, and the degree of integration is greatly improved compared with the optical fiber ring in the prior art.

Description

[Technical field]

[0001] The present invention relates to the technical field of integrated design, and in particular to coherent Ising machines based on on-chip whispering gallery mode optical microcavities.

[0002] This application claims priority to a Chinese patent application bearing application number 202110447214.3 and title "On-chip whispering gallery mode optical microcavity based coherent Ising machine" filed with the China Patent Office on April 25, 2021, the entirety of which is incorporated herein by reference. [Background technology]

[0003] NP-complete problems are one of the seven major mathematical problems in the world, and are also called non-deterministic problems of polynomial complexity. The so-called non-determinism means that a certain number of operations can be used to solve the problem, which can be solved in polynomial time.

[0004] Based on this, currently, NP-complete problems in the computer field are limited by computational power and cannot obtain accurate results within a reasonable time, whereas algorithms designed using coherent Ising machines can solve problems such as maximum cut.

[0005] However, the integration density of current coherent Ising machines is still low. Summary of the Invention [Problem to be solved by the invention]

[0006] In view of this, in order to solve the above problems, the present invention provides a coherent Ising machine based on an on-chip whispering gallery mode optical microcavity, and its technical solutions are as follows: [Means for solving the problem]

[0007] An on-chip whispering gallery mode optical microcavity based coherent Ising machine, the coherent Ising machine being a laser transmitter, the laser transmitter being used to emit a first pulsed laser at a first wavelength; a first laser processing device, the first laser processing device being used to convert the first pulsed laser into a second pulsed laser having a second wavelength; an optical microcavity, wherein a second laser processing device is integrated within the optical microcavity, the second laser processing device being used to convert a second pulsed laser incident on the optical microcavity into a third pulsed laser of the first wavelength; A zero-difference frequency measurement device, the zero-difference frequency measurement device being for obtaining a phase of the third pulse laser based on the first pulse laser and the third pulse laser; and a feedback device for adjusting a width and a phase of the first pulsed laser based on a phase of the third pulsed laser and for injecting the third pulsed laser into the optical microcavity at a set time to amplify the third pulsed laser.

[0008] Preferably, in the above coherent Ising machine, the feedback device includes an intensity modulator, a phase modulator, and an FPGA device; Here, the FPGA device adjusts the width and phase of the first pulse laser by controlling the operating states of the intensity modulator and the phase modulator based on the output result of the zero-difference frequency measurement device; the intensity modulator is used to adjust a width of the first pulsed laser; The phase modulator is used to adjust the phase of the first pulsed laser.

[0009] Preferably, in the above coherent Ising machine, the coherent Ising machine further comprises: A first coupler is included, the first coupler being used to couple the second pulsed laser into the optical microcavity.

[0010] Preferably, in the coherent Ising machine, an upper waveguide is integrated in the optical microcavity, Here, the first coupler is used to couple the second pulsed laser into the optical microcavity via the upper waveguide.

[0011] Preferably, in the coherent Ising machine, The first coupler is further used to inject a first pulsed laser signal, after being processed by the feedback device, into the optical microcavity via the upper waveguide.

[0012] Preferably, in the above-mentioned coherent Ising machine, a lower waveguide is integrated in the optical microcavity, and the first pulsed laser signal after being processed by the feedback device is injected into the optical microcavity through the lower waveguide.

[0013] Preferably, in the above coherent Ising machine, the coherent Ising machine further comprises: A second coupler is included, the second coupler being used to split the first pulsed laser light into two pulsed laser lights.

[0014] Here, one pulse laser is sent to the first laser processing device, and the other pulse laser is sent to the feedback device and the zero-difference frequency measuring device, respectively.

[0015] Preferably, in the above coherent Ising machine, the coherent Ising machine further comprises: The amplifier is used to amplify the first pulse laser emitted from the laser transmitter.

[0016] Preferably, in the above coherent Ising machine, the coherent Ising machine further includes a third coupler, an optical-to-electrical converter, and an oscilloscope.

[0017] Here, the third coupler is used to split the third pulse laser output from the optical microcavity into two pulse lasers.

[0018] One of the pulsed lasers is sent to the difference frequency measurement device, Another pulsed laser is sent to the photoelectric converter.

[0019] The photoelectric converter is used for photoelectric conversion of a pulse laser, The oscillograph is used to monitor the signal after photoelectric conversion.

[0020] Preferably, in the above coherent Ising machine, the optical microcavity comprises a resonant cavity with a rotationally symmetric structure. Effect of the Invention

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] The present invention provides an on-chip whispering gallery mode coherent Ising machine based on an optical microcavity, comprising: a laser transmitter, the laser transmitter is used for emitting a first pulsed laser having a first wavelength; a first laser processing device, the first laser processing device is used for converting the first pulsed laser into a second pulsed laser having a second wavelength; an optical microcavity, a second laser processing device is integrated in the optical microcavity, the second laser processing device is used for converting the second pulsed laser incident into the optical microcavity into a third pulsed laser having the first wavelength; a zero-difference frequency measurement device, the zero-difference frequency measurement device is used for acquiring a phase of the third pulsed laser based on the first pulsed laser and the third pulsed laser; and a feedback device, the feedback device is used for adjusting a width and a phase of the first pulsed laser based on the phase of the third pulsed laser, and incidenting the first pulsed laser into the optical microcavity at a set time, and enhancing the third pulsed laser.

[0023] Such a coherent Ising machine mainly utilizes an optical microcavity in which a second laser processing device (nonlinear crystal) is integrated, realizing an on-chip structure, which has a significantly higher degree of integration compared to the optical fiber ring in the conventional technology. [Brief description of the drawings]

[0024] In order to more clearly describe the embodiments of the present invention or the technical solutions of the prior art, the following briefly introduces drawings necessary for the description of the embodiments or the prior art. It is clear that the drawings in the following description are only for illustrating the embodiments of the present invention, and those skilled in the art can obtain other drawings based on the drawings provided without creative labor. [Figure 1] 1 is a structural schematic diagram of the principle of a coherent Ising machine based on an on-chip whispering gallery mode optical microcavity provided by an embodiment of the present invention; [Diagram 2]FIG. 1 is a structural schematic diagram of the principle of a coherent Ising machine based on another on-chip whispering gallery mode optical microcavity provided by an embodiment of the present invention. [Diagram 3] FIG. 20 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity-based coherent Ising machine provided by an embodiment of the present invention; [Figure 4] FIG. 1 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention; [Diagram 5] FIG. 1 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention; [Figure 6] FIG. 1 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention; [Figure 7] FIG. 1 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention; [Figure 8] FIG. 1 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention; [Figure 9] FIG. 1 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention; [Figure 10] FIG. 5 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity-based coherent Ising machine provided by an embodiment of the present invention; [Figure 11]FIG. 1 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention; [Figure 12] FIG. 1 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, the technical solutions in the embodiments of the present invention are described clearly and completely with reference to the drawings in the embodiments of the present invention. It is clear that the described embodiments are only some of the embodiments, not all of the embodiments. Based on the embodiments of the present invention, a person skilled in the art can obtain all other embodiments without creative labor, and they are included in the protection scope of the present invention.

[0026] In the process of completing the invention of the present invention, the inventors found that a conventional coherent Ising machine uses an optical fiber ring structure to inject an optical pulse into the optical fiber ring, and periodic resonance is applied. When performing calculations, the pulse is induced to measure feedback and control the injection, thereby realizing a coherent Ising machine and completing the calculation.

[0027] That is, the conventional coherent Ising machine uses degenerate parametric oscillation in nonlinear optics to generate optical frequency pulses, which are then injected into a fiber ring, and a feedback injection mechanism is used to realize interactions between the optical pulses, thereby completing calculations such as the maximum cut problem.

[0028] However, the inventors discovered that the system integration of this coherent Ising machine was very low, requiring the integration of several kilometers of optical fiber rings and the use of separate nonlinear crystals for pumping.

[0029] In view of this, the present invention provides a coherent Ising machine based on an on-chip whispering gallery mode optical microcavity, which greatly improves the integration degree of the coherent Ising machine and brings about highly beneficial market effects.

[0030] In order to make the above objects, features and advantages of the present invention more clear, the embodiments of the present invention will be described in more detail below with reference to the drawings and specific embodiments.

[0031] As shown in FIG. 1, FIG. 1 is a structural schematic diagram of the principle of a coherent Ising machine based on an on-chip whispering gallery mode optical microcavity provided by an embodiment of the present invention.

[0032] The coherent Ising machine is A laser transmitter 11, the laser transmitter 11 being used to emit a first pulse laser having a first wavelength; a first laser processing device 12, the first laser processing device 12 being used for converting the first pulsed laser into a second pulsed laser having a second wavelength; an optical microcavity 13, in which a second laser processing device 14 is integrated, the second laser processing device being used to convert a second pulsed laser incident on the optical microcavity 13 into a third pulsed laser of the first wavelength; a zero-difference frequency measurement device 15 for obtaining a phase of the third pulse laser based on the first pulse laser and the third pulse laser; A feedback device 16 includes a feedback device for adjusting a width and a phase of the first pulse laser based on the phase of the third pulse laser, and for inputting the third pulse laser into the optical microcavity 13 at a set time to amplify the third pulse laser.

[0033] In this embodiment, the optical microcavity 13 is a whispering gallery mode optical microcavity, which has a rotationally symmetric structure of a resonant cavity, in which the optical field can undergo total internal reflection, thereby forming a standing wave field effect that enhances the resonance.

[0034] Optionally, the first laser processing device 12 is a periodically poled lithium niobate crystal (PPLN for short) and has a diffraction grating structure.

[0035] Optionally, the second laser processing device 14 is a periodically poled lithium niobate crystal (PPLN for short) and has a diffraction grating structure.

[0036] The laser transmitter 11 is used to emit a first pulse laser of a first wavelength, for example, the laser transmitter 11 is used to emit a first pulse laser of 1560 nanometers.

[0037] The first pulsed laser excites a periodically poled lithium niobate crystal, and a pulsed laser having a wavelength of 780 nanometers, i.e., a second pulsed laser having a second wavelength, is generated by using the second harmonic process.

[0038] The second pulsed laser coupled and incident on the optical microcavity 13 can generate an optical parametric oscillation process in the periodically poled lithium niobate crystal lattice (i.e., the second laser processing device 14) at the coupling portion of the optical microcavity 13, thereby generating a parametric oscillation pulse having a wavelength of 1560 nanometers, which is a third pulsed laser of the first wavelength.

[0039] Here, the phase of each of the degenerate pulse signals is set to 0 or π.

[0040] At this time, the optical pulses circulate in the optical microcavity 13 to form a stable pulse sequence. When a coherent Ising network needs to be constructed, the pulses are coupled to the detector end of the optical microcavity 13, and a balanced zero-difference frequency measurement is performed by the zero-difference frequency measurement device 15 to read the phase information of each pulse, that is, the zero-difference frequency measurement device 15 is used to obtain the phase of the third pulse laser according to the first pulse laser and the third pulse laser.

[0041] In addition, the read phase information is fed back to the feedback device 16, and the feedback device 16 adjusts the width and phase of the branched first pulse laser based on the phase of the third pulse laser, The third pulse laser is input into the optical microcavity 13 at a set time, interacts with the existing third pulse laser, and amplifies the third pulse laser, thereby constructing an optical pulse network having interactions.

[0042] It should be noted that such an optical pulse network refers to a network in which each of a plurality of optical pulses generated within a certain time interval serves as a node of the network, and each pulse interacts with and connects with other pulses through a feedback injection mechanism to form a network of pulses, which is an adjustable pulse timing, a controllable network node, and a programmable optical pulse network.

[0043] Optionally, in another embodiment of the present invention, as shown in FIG. 2, FIG. 2 is a structural schematic diagram of the principle of a coherent Ising machine based on an on-chip whispering gallery mode optical microcavity provided by an embodiment of the present invention.

[0044] The feedback device 16 includes an intensity modulator IM (Intensity Modulator), a phase modulator PM (Phase Modulator), and an FPGA (Field Programmable Gate Array) device 161 .

[0045] Here, the FPGA device 161 is used to adjust the width and phase of the first pulse laser by controlling the operating states of the intensity modulator IM and the phase modulator PM based on the output result of the zero difference frequency measurement device 15.

[0046] The intensity modulator IM is used to adjust the width of the first pulse laser.

[0047] The phase modulator PM is used to adjust the phase of the first pulsed laser.

[0048] In this embodiment, the signal receiving end of the FPGA device 161 is used to receive the output result signal of the zero difference frequency measurement device 15, i.e., the phase information of each pulse read by the zero difference frequency measurement device 15, and the control end of the FPGA device 161 respectively controls the operating states of the intensity modulator IM and the phase modulator PM, respectively adjusts the width and phase of each pulse of the branched first pulse laser, and also controls the modulated pulse to be incident on the optical microcavity 13 at a set time and interact with the existing third pulse laser, amplify the third pulse laser, thereby constructing an interactive optical pulse network.

[0049] Optionally, in another embodiment of the present invention, as shown in FIG. 3, FIG. 3 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention.

[0050] The coherent Ising machine further comprises: A first coupler 17 is included, which is used to couple the second pulsed laser into the optical microcavity 13 .

[0051] In this embodiment, the laser transmitter 11 is used to emit a first pulse laser of a first wavelength, for example, the laser transmitter 11 is used to emit a first pulse laser of 1560 nanometers.

[0052] The first pulsed laser excites a periodically poled lithium niobate crystal, and a pulsed laser having a wavelength of 780 nanometers, i.e., a second pulsed laser having a second wavelength, is generated by using the second harmonic process.

[0053] The second pulsed laser is coupled and incident into the optical microcavity 13 by the first coupler 17, so that the pulse signal intensity of the second pulsed laser incident into the optical microcavity 13 can be improved.

[0054] Optionally, in another embodiment of the present invention, as shown in FIG. 4, FIG. 4 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention.

[0055] An upper waveguide 18 is integrated within the optical microcavity 13; Here, the first coupler 17 is used to inject the second pulsed laser into the optical microcavity 13 via the upper waveguide 18 .

[0056] In this embodiment, the laser transmitter 11 is used to emit a first pulse laser of a first wavelength, for example, the laser transmitter 11 is used to emit a first pulse laser of 1560 nanometers.

[0057] The first pulsed laser excites a periodically poled lithium niobate crystal, and a pulsed laser having a wavelength of 780 nanometers, i.e., a second pulsed laser having a second wavelength, is generated by using the second harmonic process.

[0058] The second pulsed laser is coupled and incident into the optical microcavity 13 by the first coupler 17 and the upper waveguide 18, thereby improving the pulse signal intensity of the second pulsed laser incident into the optical microcavity 13.

[0059] Optionally, in another embodiment of the present invention, as shown in FIG. 5, FIG. 5 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention.

[0060] The first coupler 17 is further used to inject the first pulsed laser signal, after being processed by the feedback device 16 , into the optical microcavity 13 via the upper waveguide 18 .

[0061] In this embodiment, an embodiment is provided in which the modulated first pulse laser is injected into the optical microcavity 13 .

[0062] Based on this embodiment, as shown in FIG. 6, FIG. 6 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention.

[0063] The coherent Ising machine further comprises: A second coupler 19 is included, which is used to split the first pulsed laser into two pulsed lasers.

[0064] Here, one pulse laser is sent to the first laser processing device 12, and the other pulse laser is sent to the feedback device 16 and the zero-difference frequency measuring device 15, respectively.

[0065] In this embodiment, the second coupler 19 serves to split the pulsed laser, one of which is excited by the first pulsed laser through a periodically poled lithium niobate crystal to generate a pulsed laser with a wavelength of 780 nanometers, i.e., a second pulsed laser with a second wavelength, by using the second harmonic process.

[0066] Another pulsed laser may be transmitted to the feedback device 16 and the zero difference frequency measurement device 15, respectively, including but not limited to, by a beam splitter.

[0067] It should be noted that the pulsed laser processed by the feedback device 16 may be fed back to the first coupler 17 again via a beam splitter, but is not limited thereto.

[0068] Based on this embodiment, as shown in FIG. 7, FIG. 7 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention.

[0069] The coherent Ising machine further comprises: The amplifier 20 is used to amplify the first pulse laser emitted from the laser transmitter 11 .

[0070] In this embodiment, the amplifier 20 is provided between the second coupler 19 and the laser transmitter 11 and is used to amplify and process the first pulse laser emitted from the laser transmitter 11 .

[0071] The amplifier 20 is an active optical device that amplifies signal light, including but not limited to an EDFA (Erbium-doped Optical Fiber Amplifier).

[0072] Based on this embodiment, as shown in FIG. 8, FIG. 8 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention.

[0073] The coherent Ising machine further includes a third coupler 21, an optical-to-electrical converter 22, and an oscillograph 23.

[0074] Here, the third coupler 21 is used to split the third pulse laser output from the optical microcavity 13 into two pulse lasers.

[0075] One of the pulsed lasers is sent to the difference frequency measurement device 15, Another pulsed laser is sent to the photoelectric converter 22 .

[0076] The photoelectric converter 22 is used to convert a pulse laser into an electric signal. The oscillograph 23 is used to monitor the signal after photoelectric conversion.

[0077] In this embodiment, the optical pulses injected into the optical microcavity 13 circulate within the optical microcavity 13 to form a stable pulse sequence, and when a coherent Ising network needs to be constructed, the pulses are coupled to the detector end of the optical microcavity 13 by the upper waveguide 18 and the third coupler 21 for branching.

[0078] One of the pulse lasers is sent to the difference frequency measurement device 15, which performs a balanced zero-difference frequency measurement and reads the phase information of each pulse; that is, the zero-difference frequency measurement device 15 is used to obtain the phase of the third pulse laser based on the first pulse laser and the third pulse laser.

[0079] The other is processed via an opto-electrical converter 22 and the signal is monitored via an oscilloscope 23 .

[0080] Optionally, in another embodiment of the present invention, based on the coherent Ising machine shown in FIG. 4, as shown in FIG. 9, FIG. 9 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention.

[0081] A lower waveguide 24 is integrated within the optical microcavity 13; Here, the first pulsed laser signal after being processed by the feedback device 16 is injected into the optical microcavity 13 via the lower waveguide 24 .

[0082] In this example, another embodiment is provided in which the modulated first pulse laser is injected into the optical microcavity 13 .

[0083] Based on this embodiment, as shown in FIG. 10, FIG. 10 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention.

[0084] The coherent Ising machine further comprises: A second coupler 19 is included, which is used to split the first pulsed laser into two pulsed lasers.

[0085] One pulse laser is sent to the first laser processing device 12, and the other pulse laser is sent to the feedback device 16 and the zero-difference frequency measuring device 15, respectively.

[0086] In this embodiment, the second coupler 19 serves to split the pulsed laser, one of which is used to excite a periodically poled lithium niobate crystal by the first pulsed laser, and a pulsed laser with a wavelength of 780 nanometers, i.e., a second pulsed laser with a second wavelength, is generated using the second harmonic process.

[0087] Another pulsed laser may be transmitted to the feedback device 16 and the zero difference frequency measurement device 15, respectively, including but not limited to, by a beam splitter.

[0088] Based on this embodiment, as shown in FIG. 11, FIG. 11 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention.

[0089] The coherent Ising machine further comprises: The amplifier 20 is used to amplify the first pulse laser emitted from the laser transmitter 11 .

[0090] In this embodiment, the amplifier 20 is provided between the second coupler 19 and the laser transmitter 11 and is used to amplify and process the first pulse laser emitted from the laser transmitter 11 .

[0091] The amplifier 20 is an active optical device that amplifies signal light, including but not limited to an EDFA (Erbium-doped Optical Fiber Amplifier).

[0092] Based on this embodiment, as shown in FIG. 12, FIG. 12 is a structural schematic diagram of the principle of yet another on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by an embodiment of the present invention.

[0093] The coherent Ising machine further includes a third coupler 21, an optical-to-electrical converter 22, and an oscillograph 23.

[0094] Here, the third coupler 21 is used to split the third pulse laser output from the optical microcavity 13 into two pulse lasers.

[0095] One of the pulsed lasers is sent to the difference frequency measurement device 15, Another pulsed laser is sent to the photoelectric converter 22 .

[0096] The photoelectric converter 22 is used to convert a pulse laser into an electric signal. The oscillograph 23 is used to monitor the signal after photoelectric conversion.

[0097] In this embodiment, the optical pulses injected into the optical microcavity 13 circulate within the optical microcavity 13 to form a stable pulse sequence, and when a coherent Ising network needs to be constructed, the pulses are coupled to the detector end of the optical microcavity 13 by the upper waveguide 18 and the third coupler 21 for branching.

[0098] One of the pulse lasers is sent to the difference frequency measurement device 15, which performs a balanced zero-difference frequency measurement and reads the phase information of each pulse; that is, the zero-difference frequency measurement device 15 is used to obtain the phase of the third pulse laser based on the first pulse laser and the third pulse laser.

[0099] The other is processed via an opto-electrical converter 22 and the signal is monitored via an oscilloscope 23 .

[0100] As can be seen from the above, in the on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by the embodiment of the present invention, even when the degenerate optical parametric oscillation process and the optical pulse diversion are simultaneously performed in the integrated optical microcavity, the second-order nonlinear optical process can be completed by the periodically poled lithium niobate crystal integrated in the optical microcavity.

[0101] In addition, by using a whispering gallery mode optical microcavity, the degree of integration was significantly improved compared to the optical fiber ring structure used in conventional technology, and at the same time, by integrating nonlinear crystals, the entire system was able to have a chip structure, solving the problem of chipping the CIM system.

[0102] The above describes in detail the on-chip whispering gallery mode optical microcavity based coherent Ising machine provided by the present invention, and specific examples are used herein to illustrate the principles and embodiments of the present invention.

[0103] The above description of the examples is only used to help understand the method of the present invention and its core concept, and those skilled in the art may change the specific embodiment and its scope of application according to the concept of the present invention. In summary, the contents of the present specification should not be interpreted as limiting the present invention.

[0104] In addition, each embodiment in this specification is described step by step, focusing on the differences from other embodiments, and the same or similar parts between various embodiments may be mutually referred to. The description of the device disclosed in this embodiment is simplified to correspond to the method disclosed in the embodiment, and the relevant contents may be referred to the description of the method.

[0105] It should be noted that, in this specification, relational terms such as first and second are used only to distinguish one component or operation from another, and no actual relationship or order between those components or operations is required or implied. And, the terms "comprise", "include", or any other variation thereof are intended to cover a non-exclusive inclusion, since they may include elements inherent in a process, method, article or device of a series of elements, or elements inherent in those processes, methods, articles or devices. Absent further limitations, an element limited by the words "comprise" does not exclude the presence of additional identical elements in the process, method, article or device that includes that element.

[0106] The above description of the disclosed embodiments allows a person skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to a person skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not limited to the embodiments described herein, but is intended to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. 1. An on-chip whispering gallery mode optical microcavity based coherent Ising machine, comprising: a laser transmitter adapted to emit a first pulsed laser having a first wavelength; A first laser processing device, the first laser processing device being used for converting the first pulsed laser into a second pulsed laser having a second wavelength by using a second harmonic process; An optical microcavity, the optical microcavity having a resonant cavity with a rotational symmetric structure, an optical field can be totally reflected on the inner surface of the resonant cavity, a second laser processing device is integrated in the optical microcavity, the second laser processing device is used for converting a second pulsed laser incident on the optical microcavity into a third pulsed laser of the first wavelength by using an optical parametric oscillation process, the second laser processing device is a periodically poled lithium niobate crystal (PPLN) integrated in a coupling part of the optical microcavity; A zero-difference frequency measurement device, the zero-difference frequency measurement device being for obtaining a phase of the third pulse laser based on the first pulse laser and the third pulse laser; a feedback device for adjusting a width and a phase of the first pulsed laser based on a phase of the third pulsed laser, and for inputting the first pulsed laser into the optical microcavity at a set time to amplify the third pulsed laser; a first coupler, the first coupler being used to couple the second pulsed laser into the optical microcavity through an upper waveguide integrated in the optical microcavity; wherein the first coupler is further used to inject a first pulsed laser signal, after being processed by the feedback device, into the optical microcavity via the upper waveguide; or A coherent Ising machine, characterized in that a lower waveguide is integrated in the optical microcavity, a first pulsed laser signal after being processed by the feedback device is input into the optical microcavity through the lower waveguide, and both the upper waveguide and the lower waveguide are used for input.

2. The feedback device comprises: An intensity modulator, a phase modulator, and an FPGA device, Here, the FPGA device adjusts the width and phase of the first pulse laser by controlling the operating states of the intensity modulator and the phase modulator based on the output result of the zero-difference frequency measurement device; the intensity modulator is used to adjust a width of the first pulsed laser; 2. The coherent Ising machine of claim 1, wherein the phase modulator is used to adjust the phase of the first pulsed laser.

3. The coherent Ising machine further comprises: A second coupler is included, the second coupler being used to split the first pulsed laser light into two pulsed lasers.

2. The coherent Ising machine according to claim 1, wherein one pulse laser is sent to the first laser processing device, and the other pulse laser is sent to the feedback device and the zero-difference frequency measurement device, respectively.

4. The coherent Ising machine further comprises:

2. The coherent Ising machine according to claim 1, further comprising an amplifier, the amplifier being used to amplify the first pulse laser emitted from the laser transmitter.

5. the coherent Ising machine further comprises a third coupler, an optical-to-electrical converter, and an oscilloscope; wherein the third coupler is used to split the third pulse laser output from the optical microcavity into two pulse lasers; One of the pulsed lasers is sent to the zero difference frequency measuring device, Another pulsed laser is sent to the photoelectric converter, The photoelectric converter is used for photoelectric conversion of a pulse laser, 2. The coherent Ising machine according to claim 1, wherein the oscilloscope is used to monitor a signal after photoelectric conversion.

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