A method and system for designing an optical resonator for adaptive narrowing of a laser linewidth

Abstract

The application provides a laser linewidth adaptive narrowing optical resonant cavity design method and system, temperature distribution data of an optical resonant cavity surface is collected, the temperature distribution data contains coordinate information and temperature values of each temperature measurement point; based on the temperature distribution data, a deformation gradient of the optical resonant cavity is calculated; the deformation gradient is linearly converted to generate an initial compensation signal, and based on a preset deformation threshold, an electrical compensation signal is obtained; according to the electrical compensation signal, an adjusted cavity mirror spacing is obtained; the deformation gradient is compensated by using the adjusted cavity mirror spacing to offset the instantaneous deformation, and the cavity structure of the optical resonant cavity is stably adjusted by using a preset thermal expansion coefficient, so as to cooperatively realize adaptive narrowing of the laser linewidth; the technical scheme provided by the application realizes dynamic adjustment of the cavity mirror spacing to compensate for the instantaneous thermal deformation, thereby adaptively narrowing the laser linewidth, and the frequency stability and output precision of the laser are improved.

Description

Technical Field

[0001] This application relates to the field of optical engineering technology, and in particular to a design method and system for an optical resonator with adaptive laser linewidth narrowing. Background Technology

[0002] In the field of high-precision laser measurement, extremely stringent requirements are placed on the long-term frequency stability of narrow-linewidth lasers. Cavity length drift caused by the thermal expansion and contraction of materials in optical resonators directly leads to laser frequency shift and linewidth broadening, severely affecting system performance.

[0003] Currently, to address frequency instability caused by temperature variations, existing solutions employ fused silica as the main material for the optical resonant cavity and combine it with an external wavelength-locked feedback loop for frequency stabilization. These solutions indirectly achieve frequency locking by comparing the laser frequency with the transmission peak of the reference cavity in real time. Once a shift is detected, the driving current of the laser gain medium or the phase of the external modulator is adjusted via a servo circuit. However, these solutions have certain drawbacks. For example, the cavity's geometric length slowly drifts with temperature, causing the reference cavity's resonant frequency to shift accordingly. Furthermore, the feedback loop's response speed is limited by detection delay and servo bandwidth, making it difficult to promptly correct cavity mode mismatch caused by thermal stress accumulation, ultimately leading to increased linewidth fluctuations and decreased long-term stability. Summary of the Invention

[0004] This application provides a laser linewidth adaptive narrowing optical resonator design method and system to solve the problems in the prior art, such as the easy deviation of cavity geometry length from the reference cavity resonant frequency, the difficulty in timely correction of cavity mode mismatch caused by thermal stress accumulation, which leads to increased linewidth fluctuations and decreased long-term stability.

[0005] In a first aspect, this application provides a laser linewidth adaptive narrowing optical resonator design method, including:

[0006] Collect temperature distribution data on the surface of the optical resonant cavity, wherein the temperature distribution data includes the coordinate information and temperature value of each temperature measurement point;

[0007] Based on the temperature distribution data, the deformation gradient of the optical resonant cavity is calculated;

[0008] The deformation gradient is linearly transformed to generate an initial compensation signal, and the amplitude of the initial compensation signal is adjusted based on a preset deformation threshold to obtain an electrical compensation signal.

[0009] The cavity mirror spacing of the optical resonant cavity is adjusted according to the electrical compensation signal to obtain the adjusted cavity mirror spacing.

[0010] The deformation gradient is compensated by the adjusted cavity mirror spacing to counteract instantaneous deformation. At the same time, the cavity structure of the optical resonant cavity is stabilized by using the preset thermal expansion coefficient to achieve adaptive narrowing of the laser linewidth.

[0011] Optionally, based on the temperature distribution data, the deformation gradient of the optical resonator is calculated, including:

[0012] Based on the temperature distribution data, the average temperature value is calculated, and the temperature measurement point with the smallest difference from the average temperature value and located in the central region of the optical resonant cavity is selected as the reference point. The temperature value of the reference point is used as the reference point temperature data.

[0013] Starting from the reference point, select temperature measurement points within a preset range as comparison points, and calculate the temperature difference and straight-line distance between each comparison point and the reference point.

[0014] Based on the deformation law of the optical resonant cavity at different temperatures, a deformation coefficient is set, and the temperature difference at each comparison point is multiplied by the deformation coefficient to obtain multiple cavity deformation values;

[0015] Based on the cavity deformation and corresponding straight-line distance value at each comparison point, multiple unit distance deformation values ​​are obtained, and the unit distance deformation value with the largest value is selected as the deformation gradient of the optical resonant cavity.

[0016] Optionally, the deformation gradient is linearly transformed to generate an initial compensation signal, and the amplitude of the initial compensation signal is adjusted based on a preset deformation threshold to obtain an electrical compensation signal, including:

[0017] The deformation gradient is linearly transformed to obtain a linear product value. The linear product value is then transformed according to a preset electrical signal conversion rule to obtain an initial compensation signal.

[0018] Calculate the deformation difference between the deformation gradient and the preset deformation threshold. When the deformation difference is less than or equal to zero, use the preset gain coefficient as the amplitude adjustment coefficient. When the deformation difference is greater than zero, calculate the ratio between the deformation difference and the preset deformation threshold, and add the ratio and the preset gain coefficient to obtain the amplitude adjustment coefficient.

[0019] The amplitude of the initial compensation signal and the amplitude adjustment coefficient are multiplied to obtain the adjusted amplitude. Based on the adjusted amplitude, an electrical compensation signal is generated.

[0020] Optionally, the cavity mirror spacing of the optical resonant cavity is adjusted according to the electrical compensation signal to obtain the adjusted cavity mirror spacing, including:

[0021] The electrical compensation signal is subjected to bandpass filtering to extract the target signal amplitude in the target frequency band;

[0022] Based on the preset correlation between electrical signal amplitude and mechanical displacement, the target signal amplitude is converted into a displacement adjustment amount;

[0023] Based on the displacement adjustment amount and the cavity mirror spacing of the optical resonant cavity, the target value for cavity mirror spacing adjustment is calculated.

[0024] The cavity mirror spacing of the optical resonant cavity is adjusted according to the target value of the cavity mirror spacing to obtain the adjusted cavity mirror spacing.

[0025] Optionally, the deformation gradient is compensated using the adjusted cavity mirror spacing to counteract instantaneous deformation. Simultaneously, the cavity structure of the optical resonator is stabilized using a preset thermal expansion coefficient to collaboratively achieve adaptive narrowing of the laser linewidth, including:

[0026] Calculate the difference between the displacement adjustment amount and the deformation gradient, and use the difference as the compensation deviation amount;

[0027] Based on the compensation deviation, the adjusted endoscope spacing is adjusted a second time to obtain the second adjusted endoscope spacing to counteract instantaneous deformation.

[0028] Based on the difference between the average temperature of the optical resonant cavity and the preset reference temperature, and combined with the preset thermal expansion coefficient, the theoretical expansion of the cavity structure of the optical resonant cavity is calculated.

[0029] Based on the theoretical expansion amount, determine the stability adjustment parameters of the cavity structure;

[0030] Based on the aforementioned stable adjustment parameters, the cavity structure is subjected to stable adjustment processing so that the deviation between the actual expansion amount and the theoretical expansion amount of the cavity structure is within a preset stable range, so as to collaboratively achieve adaptive narrowing of the laser linewidth.

[0031] Optionally, based on the compensation deviation, the adjusted endoscope spacing is adjusted a second time to obtain a second-adjusted endoscope spacing, including:

[0032] The absolute value of the compensation deviation is compared with the preset deviation threshold. When the absolute value of the compensation deviation is less than or equal to the preset deviation threshold, the adjusted endoscope spacing is taken as the endoscope spacing after the second adjustment.

[0033] When the absolute value of the compensation deviation is greater than the preset deviation threshold, the compensation deviation and the preset fine-tuning coefficient are multiplied to obtain the secondary fine-tuning displacement. Combined with the adjusted laparoscope spacing, the secondary adjustment target value is calculated.

[0034] Based on the target value for secondary adjustment, the already adjusted laparoscope spacing is adjusted a second time to obtain the second-adjusted laparoscope spacing.

[0035] Optionally, based on the stability adjustment parameters, the cavity structure is subjected to stability adjustment processing to ensure that the deviation between the actual expansion amount and the theoretical expansion amount of the cavity structure is within a preset stability range, so as to synergistically achieve adaptive narrowing of the laser linewidth, including:

[0036] Calculate the expansion deviation between the actual expansion amount and the theoretical expansion amount of the cavity structure;

[0037] If the expansion deviation is greater than the preset stable range, the stable adjustment parameter and the preset positive amplification factor are multiplied to obtain the cooling control parameter; if the expansion deviation is less than the preset stable range, the stable adjustment parameter and the preset negative amplification factor are multiplied to obtain the heating control parameter.

[0038] Based on the cooling control parameters or the heating control parameters, the temperature value of the optical resonant cavity is adjusted to obtain the expansion deviation within a preset stable range, thereby achieving adaptive narrowing of the laser linewidth.

[0039] Secondly, this application provides an optical resonator design system for adaptive narrowing of laser linewidth, comprising:

[0040] The acquisition module is used to acquire temperature distribution data on the surface of the optical resonant cavity, the temperature distribution data including the coordinate information and temperature value of each temperature measurement point;

[0041] The calculation module is used to calculate the deformation gradient of the optical resonant cavity based on the temperature distribution data;

[0042] The conversion module is used to perform linear conversion processing on the deformation gradient to generate an initial compensation signal, and adjust the amplitude of the initial compensation signal based on a preset deformation threshold to obtain an electrical compensation signal.

[0043] An adjustment module is used to adjust the cavity mirror spacing of the optical resonant cavity according to the electrical compensation signal, so as to obtain the adjusted cavity mirror spacing;

[0044] The compensation module is used to compensate for the deformation gradient using the adjusted cavity mirror spacing to offset instantaneous deformation. At the same time, it uses a preset thermal expansion coefficient to stabilize the cavity structure of the optical resonant cavity, so as to achieve adaptive narrowing of the laser linewidth.

[0045] Thirdly, this application provides a computing device, including a processing component and a storage component; the storage component stores one or more computer instructions; the one or more computer instructions are invoked and executed by the processing component to implement the laser linewidth adaptive narrowing optical resonator design method as described in the first aspect above.

[0046] Fourthly, this application provides a computer storage medium storing a computer program, which, when executed by a computer, implements a laser linewidth adaptive narrowing optical resonator design method as described in the first aspect.

[0047] In this application, temperature distribution data of the surface of an optical resonant cavity is collected, including the coordinate information and temperature values ​​of each temperature measurement point. Based on the temperature distribution data, the deformation gradient of the optical resonant cavity is calculated. The deformation gradient is linearly transformed to generate an initial compensation signal, and the amplitude of the initial compensation signal is adjusted based on a preset deformation threshold to obtain an electrical compensation signal. According to the electrical compensation signal, the cavity mirror spacing of the optical resonant cavity is adjusted to obtain an adjusted cavity mirror spacing. The adjusted cavity mirror spacing is used to compensate for the deformation gradient to offset instantaneous deformation. At the same time, a preset thermal expansion coefficient is used to stabilize the cavity structure of the optical resonant cavity to achieve adaptive narrowing of the laser linewidth. The technical solution provided in this application accurately characterizes the non-uniform thermal state of the cavity in space, providing a data foundation for subsequent analysis of the spatial characteristics of thermally induced deformation; it realizes a physical mapping from the temperature field to the mechanical deformation trend, accurately reflecting the local deformation rate and direction caused by differences in thermal stress in various regions of the cavity; it improves the sensitivity and stability of control; it enables active and rapid fine-tuning of the optical length of the resonant cavity, directly affecting the laser mode matching condition and effectively suppressing frequency fluctuations caused by transient thermal disturbances; and it achieves coordinated control of active optical compensation and passive structural thermal management, suppressing cavity length drift sources from multiple dimensions. Furthermore, this application calculates the deviation between the cavity mirror displacement adjustment and the current deformation gradient to form a compensation deviation and implements secondary adjustment accordingly. This achieves closed-loop correction of the initial compensation error, improving the accuracy and dynamic response capability of cavity length control and addressing instantaneous deformation disturbances caused by rapid changes in thermal stress. Simultaneously, based on the temperature difference between the cavity's average temperature and the reference temperature, and combined with the material's thermal expansion coefficient, the theoretical expansion amount is calculated, thereby determining the stable adjustment parameters of the cavity structure. By directionally controlling the overall thermal expansion behavior of the cavity, the actual expansion state approaches the theoretical expectation, thus suppressing long-term drift caused by the accumulation of intrinsic thermal expansion of the material. This solves the problem of cavity mode mismatch caused by reference frequency inaccuracy due to cavity physical deformation and insufficient feedback loop bandwidth, enhancing the system's ability to maintain laser linewidth stability under complex temperature environments. It provides key technical support for the long-term reliable operation of high-precision laser systems under non-constant temperature conditions.

[0048] These or other aspects of this application will become more apparent in the following description of the embodiments. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 A flowchart illustrating a laser linewidth adaptive narrowing optical resonator design method provided in this application;

[0051] Figure 2 A schematic diagram of a laser linewidth adaptive narrowing optical resonator design system provided for this application;

[0052] Figure 3 A schematic diagram of the structure of a computing device provided in this application. Detailed Implementation

[0053] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0054] In some of the processes described in the specification, claims, and accompanying drawings of this application, multiple operations appearing in a specific order are included. However, it should be clearly understood that these operations may not be executed in the order they appear herein, or may be executed in parallel. The operation numbers, such as 101, 102, etc., are merely used to distinguish different operations and do not themselves represent any execution order. Furthermore, these processes may include more or fewer operations, and these operations may be executed sequentially or in parallel. It should be noted that the descriptions such as "first," "second," etc., in this document are used to distinguish different messages, devices, modules, etc., and do not represent a chronological order, nor do they limit "first" and "second" to different types.

[0055] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] To address the issue of cavity length drift caused by temperature changes in optical resonators during high-precision laser measurements, leading to laser frequency shift and linewidth broadening, existing technologies cannot promptly correct cavity mode mismatch caused by slow temperature changes, resulting in limited long-term stability. Therefore, this application achieves real-time sensing and prediction of thermally induced deformation trends by pre-collecting the cavity surface temperature distribution and calculating the deformation gradient. Before deformation occurs, an electrical compensation signal is generated to actively adjust the cavity mirror spacing, suppressing the impact of cavity length changes on laser frequency at the source. Simultaneously, the thermal expansion coefficient of the material is introduced to synchronously stabilize and control the cavity structure, overcoming the bottleneck that relying solely on end-frequency adjustment cannot eliminate physical deformation disturbances. This achieves high robustness and long-term stable narrowing of the laser linewidth under dynamic temperature-changing environments.

[0057] Figure 1 A flowchart illustrating a laser linewidth adaptive narrowing optical resonator design method is provided in this application embodiment, as shown below. Figure 1 As shown, the method includes:

[0058] Step 101: Collect temperature distribution data on the surface of the optical resonant cavity, the temperature distribution data including the coordinate information and temperature value of each temperature measurement point.

[0059] In this step, the optical resonant cavity refers to an optical system composed of two or more mirrors used to achieve laser oscillation and amplification, generating highly coherent laser output. Temperature distribution data refers to the set of temperature information from multiple points on the surface of the optical resonant cavity, obtained through measurement, used to calculate the deformation gradient. Temperature measurement points refer to specific locations selected on the surface of the optical resonant cavity for temperature acquisition, used to construct the temperature distribution data. Coordinate information refers to the spatial position parameters of the temperature measurement points on the surface of the optical resonant cavity, used to locate the temperature values. Temperature values ​​refer to the actual temperature values ​​at the temperature measurement points, used to calculate temperature differences and deformation.

[0060] In this embodiment of the application, the temperature distribution data of the optical resonant cavity surface is collected by setting multiple temperature measurement points on the surface of the optical resonant cavity, using temperature sensors to detect each temperature measurement point, thereby obtaining the coordinate information and temperature value of each temperature measurement point. The coordinate information reflects the position of the temperature measurement point on the surface of the optical resonant cavity, and the temperature value reflects the temperature at that position.

[0061] Step 102: Calculate the deformation gradient of the optical resonant cavity based on the temperature distribution data.

[0062] In this step, the deformation gradient refers to the rate of change of the surface deformation of the optical resonator with distance, and is used to determine the intensity of the compensation signal. The initial compensation signal refers to the original electrical signal obtained by linearly transforming the deformation gradient, and is used for subsequent amplitude adjustment.

[0063] Step 103: Perform linear transformation on the deformation gradient to generate an initial compensation signal, and adjust the amplitude of the initial compensation signal based on a preset deformation threshold to obtain an electrical compensation signal.

[0064] In this step, the preset deformation threshold refers to a pre-set critical value used to judge the degree of deformation and to determine the amplitude adjustment coefficient. The electrical compensation signal refers to the electrical signal used to drive the cavity mirror adjustment after amplitude adjustment and to control the operation of the adjustment device. The cavity mirror spacing refers to the distance between two oppositely placed mirrors in the optical resonant cavity and is used to determine the laser oscillation mode.

[0065] Step 104: Adjust the cavity mirror spacing of the optical resonant cavity according to the electrical compensation signal to obtain the adjusted cavity mirror spacing.

[0066] In this step, the adjusted laparoscope spacing refers to the distance between the laparoscopes after adjustment driven by the electrical compensation signal, which is used to offset part of the deformation.

[0067] Step 105: The deformation gradient is compensated by the adjusted cavity mirror spacing to counteract instantaneous deformation. At the same time, the cavity structure of the optical resonant cavity is stabilized by using the preset thermal expansion coefficient to achieve adaptive narrowing of the laser linewidth.

[0068] In this step, the preset coefficient of thermal expansion refers to the rate of change of length per unit temperature of the optical resonant cavity material, used to calculate the changes in cavity structure dimensions caused by temperature changes. The cavity structure refers to the main support and frame components that constitute the optical resonant cavity, used to fix the cavity mirror and maintain the shape of the resonant cavity.

[0069] This application embodiment collects temperature distribution data and calculates deformation gradient, converts it into an electrical compensation signal to adjust the cavity mirror spacing, and combines the thermal expansion coefficient to stabilize the cavity structure, thereby achieving synergistic compensation of instantaneous deformation and long-term thermal expansion, improving the stability of the optical resonant cavity, thus adaptively narrowing the laser linewidth and improving the coherence and stability of the laser output.

[0070] This application provides a specific embodiment. Step 102, based on the temperature distribution data, calculates the deformation gradient of the optical resonant cavity, specifically including the following steps:

[0071] Step 201: Calculate the average temperature value based on the temperature distribution data, and select the temperature measurement point with the smallest difference from the average temperature value and located in the central region of the optical resonant cavity as the reference point, and use the temperature value of the reference point as the reference point temperature data.

[0072] In this step, the average temperature value refers to the arithmetic mean of the temperature values ​​at all temperature measurement points in the temperature distribution data, used as a benchmark for selecting reference points. The central region refers to the central area of ​​the surface of the optical resonator, determined by its structural design and based on the geometric center position and dimensional parameters of the optical resonator. The reference point is selected from the temperature measurement points located in the central region with the smallest difference between their temperature value and the average temperature value, based on the temperature distribution data and the average temperature value. The reference point temperature data refers to the temperature value corresponding to the reference point, obtained based on the temperature measurement results of the reference point.

[0073] In this embodiment, the arithmetic mean algorithm is first used to sum the temperature values ​​of all temperature measurement points in the temperature distribution data, and then the sum is divided by the total number of temperature measurement points to obtain the average temperature value. The range of the central region is determined by the structural design parameters of the optical resonant cavity, and this range is defined as the central region. Then, the temperature measurement point with the smallest difference between its temperature value and the average temperature value is selected from the temperature measurement points in the central region and selected as the reference point. The temperature value corresponding to the reference point is recorded as the reference point temperature data.

[0074] Step 202: Starting from the reference point, select temperature measurement points within a preset range as comparison points, and calculate the temperature difference and straight-line distance between each comparison point and the reference point.

[0075] In this step, the preset range refers to a pre-defined spatial range centered on a reference point, determined based on the size and temperature field distribution characteristics of the optical resonator. The comparison point refers to a temperature measurement point located within the preset range, selected based on the preset range and the coordinate information of the temperature measurement points. The temperature difference refers to the difference between the temperature value of the comparison point and the temperature data of the reference point, calculated based on the temperature values ​​of both the comparison point and the reference point. The straight-line distance refers to the straight-line distance between the comparison point and the reference point, calculated using the distance formula between two points based on the coordinate information of both points.

[0076] In this embodiment, based on the size and temperature field distribution characteristics of the optical resonant cavity, a spatial range centered on a reference point is pre-defined as a preset range. All temperature measurement points within this preset range are selected as comparison points using coordinate information. Then, using the distance formula between two points, the straight-line distance between each comparison point and the reference point is calculated based on their coordinate information. Simultaneously, the temperature difference between each comparison point and the reference point is obtained by subtracting the temperature data of the reference point from the temperature value of each comparison point.

[0077] Step 203: Based on the deformation law of the optical resonant cavity at different temperatures, a deformation coefficient is set, and the temperature difference of each comparison point is multiplied by the deformation coefficient to obtain multiple cavity deformation values.

[0078] In this step, the deformation law refers to the rules and characteristics of deformation changes in the optical resonator under different temperature conditions, summarized based on experimental data of deformation at different temperatures. The deformation coefficient refers to the proportionality coefficient used to convert temperature differences into deformation based on the deformation law, determined based on the deformation law. The cavity deformation refers to the deformation of the optical resonator at the comparison point due to temperature differences, calculated based on the temperature difference and deformation coefficient at the comparison point.

[0079] In this embodiment of the application, by conducting deformation experiments on the optical resonant cavity under different temperature conditions, the experimental data are collected and analyzed to summarize the deformation law of the optical resonant cavity at different temperatures. Based on the deformation law, a proportional coefficient for converting the temperature difference into deformation is set as the deformation coefficient. Then, for each comparison point, the cavity deformation is calculated as follows: cavity deformation = temperature difference × deformation coefficient.

[0080] Step 204: Based on the cavity deformation and corresponding straight-line distance value of each comparison point, obtain multiple unit distance deformation values, and select the unit distance deformation value with the largest value as the deformation gradient of the optical resonant cavity.

[0081] In this step, the unit distance deformation refers to the ratio of the cavity deformation to the straight-line distance value, which is calculated based on the cavity deformation and the straight-line distance value.

[0082] In this embodiment of the application, for each comparison point, the deformation per unit distance is calculated as follows: deformation per unit distance = cavity deformation per unit distance ÷ straight line distance value, resulting in multiple deformation per unit distance values. Then, these deformation per unit distance values ​​are compared, and the one with the largest value is selected as the deformation gradient of the optical resonant cavity.

[0083] This application embodiment refines the temperature distribution data, first determining reference points and comparison points, then calculating parameters such as temperature difference and straight-line distance, combining deformation laws and deformation coefficients to obtain cavity deformation, and finally determining the deformation gradient through unit distance deformation, thereby improving the accuracy and reliability of deformation gradient calculation.

[0084] This application provides a specific embodiment. Step 103 involves performing a linear transformation on the deformation gradient to generate an initial compensation signal, and adjusting the amplitude of the initial compensation signal based on a preset deformation threshold to obtain an electrical compensation signal. This specifically includes the following steps:

[0085] Step 301: Perform a linear transformation on the deformation gradient to obtain a linear product value. According to a preset electrical signal conversion rule, convert the linear product value to obtain an initial compensation signal.

[0086] In this step, the linear product value refers to the value obtained by multiplying the deformation gradient with a preset linear transformation coefficient, calculated based on the deformation gradient and the linear transformation coefficient. The preset electrical signal conversion rule refers to the pre-defined rule for converting the linear product value into an electrical signal, used to realize the conversion from the linear product value to the initial compensation signal, and is set based on the electrical signal generation requirements and the range of the linear product value.

[0087] In this embodiment, the deformation gradient is linearly transformed by a preset linear transformation coefficient, i.e., linear product value = deformation gradient × linear transformation coefficient; then, according to a preset electrical signal conversion rule, which includes a correspondence table or conversion formula between the linear product value and the electrical signal parameter, the linear product value is converted into the corresponding electrical signal, which is the initial compensation signal.

[0088] Step 302: Calculate the deformation difference between the deformation gradient and the preset deformation threshold. When the deformation difference is less than or equal to zero, use the preset gain coefficient as the amplitude adjustment coefficient. When the deformation difference is greater than zero, calculate the ratio between the deformation difference and the preset deformation threshold, and add the ratio and the preset gain coefficient to obtain the amplitude adjustment coefficient.

[0089] In this step, the deformation difference refers to the difference between the deformation gradient and the preset deformation threshold, which is used as the basis for determining the amplitude adjustment coefficient and is calculated based on the deformation gradient and the preset deformation threshold. The preset gain coefficient refers to the pre-set coefficient used to perform basic amplification of the initial compensation signal amplitude, and is set based on the basic amplification requirements of the compensation signal.

[0090] In this embodiment, the difference between the deformation gradient and the preset deformation threshold is first calculated: deformation difference = deformation gradient - preset deformation threshold. Then, the deformation difference is judged. When the deformation difference is less than or equal to zero, the preset gain coefficient used for basic amplification is directly determined as the amplitude adjustment coefficient. When the deformation difference is greater than zero, the ratio = deformation difference ÷ preset deformation threshold, and then the amplitude adjustment coefficient = ratio + preset gain coefficient is calculated.

[0091] Step 303: Multiply the amplitude of the initial compensation signal and the amplitude adjustment coefficient to obtain the adjusted amplitude, and generate an electrical compensation signal based on the adjusted amplitude.

[0092] In this step, the amplitude adjustment coefficient refers to the coefficient calculated based on the deformation difference value, used to adjust the amplitude of the initial compensation signal. It is used to dynamically adjust the amplitude of the initial compensation signal and is calculated based on the deformation difference value, a preset deformation threshold, and a preset gain coefficient. The adjusted amplitude refers to the amplitude obtained by multiplying the amplitude of the initial compensation signal by the amplitude adjustment coefficient, calculated based on the amplitude of the initial compensation signal and the amplitude adjustment coefficient.

[0093] In this embodiment, the amplitude of the initial compensation signal is first obtained, and the adjusted amplitude is calculated as follows: the adjusted amplitude = the amplitude of the initial compensation signal × the amplitude adjustment coefficient. Then, based on the adjusted amplitude and combined with the standard process of electrical signal generation, an electrical signal with the adjusted amplitude is generated, which is the electrical compensation signal.

[0094] This application embodiment generates an initial compensation signal by performing a linear transformation on the deformation gradient, and dynamically determines the amplitude adjustment coefficient based on the deformation difference to adjust the amplitude of the initial compensation signal, ultimately obtaining an electrical compensation signal. This achieves accurate generation and dynamic adjustment of the compensation signal, enabling the compensation signal to better match the deformation of the optical resonator.

[0095] This application provides a specific embodiment. Step 104 involves adjusting the cavity mirror spacing of the optical resonant cavity according to the electrical compensation signal to obtain the adjusted cavity mirror spacing. This specifically includes the following steps:

[0096] Step 411: Perform bandpass filtering on the electrical compensation signal to extract the target signal amplitude in the target frequency band.

[0097] In this step, the target frequency band refers to the pre-defined frequency range of the effective signal related to optical resonator deformation compensation. It is used to extract the effective signal through bandpass filtering and is determined based on the frequency characteristics of the optical resonator deformation signal. The target signal amplitude refers to the amplitude parameter of the signal within the target frequency band after bandpass filtering. It is used as the basis for converting the amplitude into a displacement adjustment amount and is obtained based on the bandpass filtering of the electrical compensation signal.

[0098] In this embodiment, a bandpass filter is used to filter the electrical compensation signal. The passband range of the bandpass filter is preset to the effective signal frequency band related to optical resonator deformation compensation, i.e., the target frequency band. By filtering out noise signals outside the target frequency band, the amplitude of the signal within the target frequency band is extracted from the electrical compensation signal, and this amplitude is the target signal amplitude.

[0099] Step 402: Based on the preset correlation between the electrical signal amplitude and the mechanical displacement, the target signal amplitude is converted into a displacement adjustment amount.

[0100] In this step, the preset correlation refers to the correspondence between the electrical signal amplitude and the mechanical displacement established through calibration experiments. This relationship is used to convert the target signal amplitude into a displacement adjustment amount, obtained by fitting data from multiple calibration experiments. The displacement adjustment amount refers to the mechanical displacement amount converted from the target signal amplitude and the preset correlation. This amount is used to determine the adjustment range of the endoscope spacing and is calculated based on the target signal amplitude and the preset correlation.

[0101] In this embodiment, by conducting multiple calibration experiments on the adjustment mechanism of the optical resonant cavity, a correspondence table or conversion formula between the electrical signal amplitude and the mechanical displacement is established as a preset correlation. This relationship reflects the amount of mechanical displacement generated by the adjustment mechanism corresponding to different electrical signal amplitudes. Then, the target signal amplitude is substituted into the preset correlation, and the mechanical displacement corresponding to the target signal amplitude is obtained by looking up the table or formula. This mechanical displacement is the displacement adjustment amount.

[0102] Step 403: Calculate the target value for adjusting the cavity mirror spacing based on the displacement adjustment amount and the cavity mirror spacing of the optical resonant cavity.

[0103] In this step, the mirror spacing of the optical resonant cavity refers to the current distance between the two mirrors in the optical resonant cavity, which serves as the basic parameter for calculating the target value of the mirror spacing adjustment. It is obtained based on real-time measurements from a distance measuring device. The target value of the mirror spacing adjustment refers to the target distance that should be achieved between the mirrors, calculated based on the mirror spacing and displacement adjustment amount of the optical resonant cavity. It is used to guide the operation of the mirror adjustment mechanism and is calculated based on the mirror spacing and displacement adjustment amount of the optical resonant cavity.

[0104] In this embodiment, the current cavity mirror spacing of the optical resonant cavity is first obtained by a distance measuring device, i.e., the cavity mirror spacing of the optical resonant cavity; then, according to the direction of the displacement adjustment, the cavity mirror spacing adjustment target value is calculated as follows: cavity mirror spacing adjustment target value = cavity mirror spacing of the optical resonant cavity ± displacement adjustment amount.

[0105] Step 404: Adjust the cavity mirror spacing of the optical resonant cavity according to the target value of the cavity mirror spacing to obtain the adjusted cavity mirror spacing.

[0106] In this embodiment, the target value for adjusting the cavity mirror spacing is input into the cavity mirror adjustment mechanism of the optical resonant cavity. The adjustment mechanism drives the cavity mirror to move according to the target value. By monitoring the actual position of the cavity mirror in real time, it ensures that the cavity mirror moves to a position consistent with the target value for adjusting the cavity mirror spacing, and finally obtains the adjusted cavity mirror spacing.

[0107] This application embodiment extracts the effective signal by bandpass filtering the electrical compensation signal, converts it into a displacement adjustment amount, calculates the target value for the cavity mirror spacing adjustment, and finally completes the adjustment of the cavity mirror spacing. It effectively filters out signal noise and realizes the precise conversion of electrical signals into mechanical displacement and the precise adjustment of the cavity mirror spacing.

[0108] This application provides a specific embodiment. Step 105 involves using the adjusted cavity mirror spacing to compensate for the deformation gradient, thereby offsetting instantaneous deformation. Simultaneously, a preset thermal expansion coefficient is used to stabilize the cavity structure of the optical resonant cavity, thereby collaboratively achieving adaptive narrowing of the laser linewidth. The specific steps include:

[0109] Step 501: Calculate the difference between the displacement adjustment amount and the deformation gradient, and use the difference as the compensation deviation amount.

[0110] In this step, the compensation deviation refers to the numerical difference between the displacement adjustment amount and the deformation gradient, which is used as the basis for judging the secondary adjustment of the laparoscope spacing. It is obtained by subtracting the displacement adjustment amount and the deformation gradient.

[0111] In this embodiment, the displacement adjustment amount and deformation gradient are numerically calculated by basic subtraction operation. The numerical difference obtained by subtracting the deformation gradient from the displacement adjustment amount is used as the compensation deviation amount. This process is used to quantify the deformation compensation error that still exists after the initial adjustment.

[0112] Step 502: Based on the compensation deviation, the adjusted endoscope spacing is adjusted a second time to obtain the second adjusted endoscope spacing to offset the instantaneous deformation.

[0113] In this step, the secondary adjustment of the laparoscope spacing refers to the distance between the laparoscopes obtained after a secondary fine-tuning of the adjusted laparoscope spacing based on the compensation deviation amount. This distance is used to compensate for instantaneous deformation and is adjusted based on the compensation deviation amount and the adjusted laparoscope spacing.

[0114] In this embodiment, the compensation deviation is first compared with a preset deviation threshold. When the compensation deviation exceeds the threshold, the cavity mirror adjustment mechanism applies a fine adjustment amount corresponding to the deviation to the adjusted cavity mirror spacing. When the compensation deviation is within the threshold, the original spacing is maintained, and finally the cavity mirror spacing after secondary adjustment is obtained, thereby offsetting the instantaneous deformation of the optical resonant cavity caused by temperature fluctuations.

[0115] Step 503: Based on the difference between the average temperature value of the optical resonant cavity and the preset reference temperature value, and combined with the preset thermal expansion coefficient, calculate the theoretical expansion amount of the cavity structure of the optical resonant cavity.

[0116] In this step, the preset reference temperature value refers to the standard temperature value set before the optical resonator operates normally. It is used as a reference for calculating temperature changes and is obtained based on the design parameters of the optical resonator. The theoretical expansion amount refers to the amount of expansion that the cavity structure should produce, calculated based on the temperature difference, the coefficient of thermal expansion, and the original length of the cavity. It is used to guide the stable adjustment of the cavity structure and is calculated based on the average temperature value, the preset reference temperature value, the preset coefficient of thermal expansion, and the original length of the cavity.

[0117] In this embodiment, the average temperature value is calculated using the surface temperature distribution data of the optical resonant cavity collected by the temperature sensor. The temperature difference between the average temperature value and the preset reference temperature value is obtained by subtraction. Then, the temperature difference is multiplied by the preset thermal expansion coefficient and the original length of the optical resonant cavity structure. The calculation formula is: theoretical expansion amount = (average temperature value - preset reference temperature value) × preset thermal expansion coefficient × original length of cavity structure, thus obtaining the theoretical expansion amount of the cavity structure.

[0118] Step 504: Determine the stability adjustment parameters of the cavity structure based on the theoretical expansion amount.

[0119] In this step, the stable adjustment parameter refers to the control parameter used to adjust the temperature of the cavity structure, which is determined based on the theoretical expansion amount. This includes the temperature control force required to make the cavity structure reach the theoretical expansion amount, and is used to drive the temperature control actuator.

[0120] In the embodiments of this application, based on the magnitude and direction of the theoretical expansion, and combined with the temperature control system characteristics of the cavity structure, parameters for adjusting the cavity temperature are calculated, and these parameters together constitute stable adjustment parameters.

[0121] Step 505: Based on the stability adjustment parameters, perform stability adjustment on the cavity structure so that the deviation between the actual expansion amount and the theoretical expansion amount of the cavity structure is within a preset stability range, so as to achieve adaptive narrowing of the laser linewidth.

[0122] In this step, the preset stability range refers to the pre-defined deviation range between the actual expansion amount and the theoretical expansion amount, which is used to determine whether the cavity structure adjustment meets the standard. It is set based on the precision requirements of laser linewidth narrowing.

[0123] In this embodiment, the stable adjustment parameters are input to the temperature control actuator of the cavity structure. By monitoring the actual expansion of the cavity structure in real time, the output of the actuator is continuously adjusted until the deviation between the actual expansion and the theoretical expansion falls within the preset stable range. This works in conjunction with the secondary adjustment of the cavity mirror spacing to achieve adaptive narrowing of the laser linewidth.

[0124] This application embodiment calculates the compensation deviation and adjusts the cavity mirror spacing twice to offset instantaneous deformation. At the same time, it calculates the theoretical expansion amount by combining the thermal expansion coefficient and adjusts the cavity structure to keep its expansion deviation within a preset range, thus achieving synergistic compensation between instantaneous deformation and long-term thermal expansion.

[0125] This application provides a specific embodiment. Step 502 involves a secondary adjustment of the adjusted endoscope spacing based on the compensation deviation, to obtain a secondary adjusted endoscope spacing. This specifically includes the following steps:

[0126] Step 511: Compare the absolute value of the compensation deviation with the preset deviation threshold. When the absolute value of the compensation deviation is less than or equal to the preset deviation threshold, use the adjusted endoscope spacing as the endoscope spacing after secondary adjustment.

[0127] In this step, the preset deviation threshold refers to the maximum absolute value of the allowable compensation deviation, which is used to determine whether secondary adjustment is needed.

[0128] In this embodiment, the absolute value of the compensation deviation is obtained by absolute value operation, and the absolute value is compared with the preset deviation threshold by a numerical comparison algorithm. When the absolute value of the compensation deviation is less than or equal to the preset deviation threshold, it is determined that the initial adjustment has met the accuracy requirements, and the adjusted endoscope spacing is directly determined as the endoscope spacing after the second adjustment.

[0129] Step 512: When the absolute value of the compensation deviation is greater than the preset deviation threshold, the compensation deviation and the preset fine-tuning coefficient are multiplied to obtain the secondary fine-tuning displacement. Combined with the adjusted laparoscope spacing, the secondary adjustment target value is calculated.

[0130] In this step, the secondary fine-tuning displacement refers to the small displacement adjustment obtained by multiplying the compensation deviation amount by the preset fine-tuning coefficient, which is used to calculate the secondary adjustment target value. The secondary adjustment target value refers to the final target value of the endoscope spacing calculated based on the adjusted endoscope spacing and the secondary fine-tuning displacement, which is used to guide the secondary adjustment operation.

[0131] In this embodiment of the application, when the absolute value of the compensation deviation is greater than the preset deviation threshold, the secondary fine-tuning displacement is equal to the compensation deviation multiplied by the preset fine-tuning coefficient; then, based on the sign of the compensation deviation, the secondary adjustment target value is calculated as: the adjusted laparoscope spacing ± the secondary fine-tuning displacement.

[0132] Step 513: Based on the target value for secondary adjustment, perform a secondary adjustment on the adjusted endoscope spacing to obtain the secondary adjusted endoscope spacing.

[0133] In this embodiment, the secondary adjustment target value is input to the high-precision endoscope adjustment system. The change in the endoscope spacing is monitored in real time through a closed-loop feedback control algorithm, and the endoscope is driven to move to a position consistent with the secondary adjustment target value, thus obtaining the endoscope spacing after secondary adjustment.

[0134] This application embodiment dynamically determines whether to perform secondary adjustment and the adjustment range by judging the relationship between the compensation deviation and the preset deviation threshold, thereby achieving graded precision control of the endoscope spacing.

[0135] This application provides a specific embodiment, step 505, which involves performing a stabilization adjustment process on the cavity structure based on the stabilization adjustment parameters, so that the deviation between the actual expansion amount and the theoretical expansion amount of the cavity structure is within a preset stable range, so as to collaboratively achieve adaptive narrowing of the laser linewidth, specifically including the following steps:

[0136] Step 521: Calculate the expansion deviation between the actual expansion amount and the theoretical expansion amount of the cavity structure.

[0137] In this step, the actual expansion refers to the actual dimensional expansion of the optical resonant cavity structure at the current temperature, as monitored in real time by measuring equipment such as a laser interferometer. This expansion is used to compare with the theoretical expansion to calculate the deviation. The expansion deviation is the difference between the actual and theoretical expansion, used to determine whether the temperature control parameters need to be adjusted.

[0138] In this embodiment of the application, the actual dimensional change of the cavity structure of the optical resonant cavity at the current temperature is measured in real time by a laser interferometer to obtain the actual expansion amount, and then the expansion deviation amount is calculated as: actual expansion amount - theoretical expansion amount.

[0139] Step 522: If the expansion deviation is greater than the preset stable range, the stable adjustment parameter and the preset positive amplification coefficient are multiplied to obtain the cooling control parameter; if the expansion deviation is less than the preset stable range, the stable adjustment parameter and the preset negative amplification coefficient are multiplied to obtain the heating control parameter.

[0140] In this step, the preset forward amplification factor refers to a pre-set coefficient used to enhance the cooling regulation force, which is used to strengthen the cooling effect when there is excessive expansion. It is set based on the heat dissipation characteristics of the cavity structure. The cooling control parameter refers to the parameter used to control the cooling system, which is obtained by multiplying the stable adjustment parameter and the preset forward amplification factor. It is used to drive the cooling system to enhance the cooling effect and is calculated based on the stable adjustment parameter and the preset forward amplification factor.

[0141] In this embodiment, the expansion deviation is compared with a preset stable range. If the expansion deviation is greater than the preset stable range, it indicates that the cavity structure has expanded excessively and the cooling force needs to be increased. In this case, the cooling control parameter = stable adjustment parameter × preset positive amplification factor. If the expansion deviation is less than the preset stable range, it indicates that the cavity structure has expanded insufficiently and the heating force needs to be increased. In this case, the heating control parameter = stable adjustment parameter × preset negative amplification factor.

[0142] Step 523: Based on the cooling control parameters or the heating control parameters, adjust the temperature value of the optical resonant cavity to obtain the expansion deviation within a preset stable range, thereby achieving adaptive narrowing of the laser linewidth.

[0143] In this step, the preset reverse amplification factor refers to a pre-set coefficient used to enhance the temperature regulation force, which is used to strengthen the temperature rise effect when expansion is insufficient, and is set based on the heat absorption characteristics of the cavity structure. The temperature rise control parameter refers to the parameter used to control the heating system, which is obtained by multiplying the stable regulation parameter and the preset reverse amplification factor, and is used to drive the heating system to enhance the temperature rise effect. It is calculated based on the stable regulation parameter and the preset reverse amplification factor.

[0144] In this embodiment, when the cooling control parameters are obtained, they are input to the cooling system of the cavity structure, and the temperature value of the optical resonant cavity is adjusted by increasing the cooling flow rate or decreasing the temperature of the cooling medium; when the heating control parameters are obtained, they are input to the heating system, and the temperature value of the optical resonant cavity is adjusted by increasing the heating power, and the adjustment is continued until the expansion deviation falls into the preset stable range, thereby realizing the adaptive narrowing of the laser linewidth.

[0145] This application embodiment calculates the expansion deviation and, based on its relationship with a preset stable range, dynamically generates cooling or heating control parameters to precisely regulate the temperature of the optical resonant cavity, ensuring that the expansion deviation of the cavity structure remains within a preset range.

[0146] Figure 2 This application provides a schematic diagram of the structure of an optical resonator design system for adaptive laser linewidth narrowing, as shown in the embodiment of the present application. Figure 2 As shown, the system includes:

[0147] The acquisition module 21 is used to acquire temperature distribution data on the surface of the optical resonant cavity, wherein the temperature distribution data includes the coordinate information and temperature value of each temperature measurement point;

[0148] Calculation module 22 is used to calculate the deformation gradient of the optical resonant cavity based on the temperature distribution data;

[0149] The conversion module 23 is used to perform linear conversion processing on the deformation gradient to generate an initial compensation signal, and adjust the amplitude of the initial compensation signal based on a preset deformation threshold to obtain an electrical compensation signal.

[0150] The adjustment module 24 is used to adjust the cavity mirror spacing of the optical resonant cavity according to the electrical compensation signal to obtain the adjusted cavity mirror spacing;

[0151] The compensation module 25 is used to compensate for the deformation gradient using the adjusted cavity mirror spacing to offset instantaneous deformation, and at the same time to stabilize the cavity structure of the optical resonant cavity using a preset thermal expansion coefficient, so as to achieve adaptive narrowing of the laser linewidth.

[0152] Figure 2The aforementioned laser linewidth adaptive narrowing optical resonator design system can perform... Figure 1 The implementation principle and technical effects of the laser linewidth adaptive narrowing optical resonator design method described in the illustrated embodiment will not be repeated here. The specific operation methods of each module and unit in the laser linewidth adaptive narrowing optical resonator design system described in the above embodiments have been described in detail in the embodiments related to this method, and will not be elaborated upon here.

[0153] In one possible design, Figure 2 The laser linewidth adaptive narrowing optical resonator design system of the embodiment shown can be implemented as a computing device, such as... Figure 3 As shown, the computing device may include a storage component 31 and a processing component 32;

[0154] The storage component 31 stores one or more computer instructions, wherein the one or more computer instructions are invoked and executed by the processing component 32.

[0155] The processing component 32 is used for the above Figure 1 The embodiment describes a laser linewidth adaptive narrowing optical resonator design method.

[0156] The processing component 32 may include one or more processors to execute computer instructions to complete all or part of the steps in the above-described method. Alternatively, the processing component may be implemented as one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described method.

[0157] Storage component 31 is configured to store various types of data to support operations at the terminal. The storage component can be implemented from any type of volatile or non-volatile storage device or a combination thereof, such as Random Access Memory (RAM), Static Random-Access Memory (SRAM), Electrically Erasable Programmable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0158] Of course, computing devices may also include other components, such as input / output interfaces, display components, communication components, etc.

[0159] Input / output interfaces provide interfaces between processing components and peripheral interface modules, which can be output devices, input devices, etc.

[0160] The communication components are configured to facilitate wired or wireless communication between computing devices and other devices.

[0161] The computing device can be a physical device or an elastic computing host provided by a cloud computing platform. In this case, the computing device can refer to a cloud server, and the aforementioned processing components, storage components, etc., can be basic server resources rented or purchased from the cloud computing platform.

[0162] This application also provides a computer storage medium storing a computer program, which, when executed by a computer, can perform the above-described functions. Figure 1 The embodiment shown illustrates a laser linewidth adaptive narrowing optical resonator design method.

[0163] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0164] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0165] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0166] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for designing an optical resonator with adaptive laser linewidth narrowing, characterized in that, include: Collect temperature distribution data on the surface of the optical resonant cavity, wherein the temperature distribution data includes the coordinate information and temperature value of each temperature measurement point; Based on the temperature distribution data, the deformation gradient of the optical resonant cavity is calculated; The deformation gradient is linearly transformed to generate an initial compensation signal, and the amplitude of the initial compensation signal is adjusted based on a preset deformation threshold to obtain an electrical compensation signal. The cavity mirror spacing of the optical resonant cavity is adjusted according to the electrical compensation signal to obtain the adjusted cavity mirror spacing. The deformation gradient is compensated by the adjusted cavity mirror spacing to counteract instantaneous deformation. At the same time, the cavity structure of the optical resonant cavity is stabilized by the preset thermal expansion coefficient to achieve adaptive narrowing of the laser linewidth. The adjusted cavity mirror spacing is used to compensate for the deformation gradient to counteract instantaneous deformation. Simultaneously, a preset thermal expansion coefficient is used to stabilize the cavity structure of the optical resonant cavity, thereby collaboratively achieving adaptive narrowing of the laser linewidth. This includes: Calculate the difference between the displacement adjustment amount and the deformation gradient, and use the difference as the compensation deviation amount; Based on the compensation deviation, the adjusted endoscope spacing is adjusted a second time to obtain the second adjusted endoscope spacing to counteract instantaneous deformation. Based on the difference between the average temperature of the optical resonant cavity and the preset reference temperature, and combined with the preset thermal expansion coefficient, the theoretical expansion of the cavity structure of the optical resonant cavity is calculated. Based on the theoretical expansion amount, determine the stability adjustment parameters of the cavity structure; Based on the aforementioned stable adjustment parameters, the cavity structure is subjected to stable adjustment processing so that the deviation between the actual expansion amount and the theoretical expansion amount of the cavity structure is within a preset stable range, so as to collaboratively achieve adaptive narrowing of the laser linewidth. Based on the aforementioned stabilization parameters, the cavity structure is subjected to stabilization adjustment to ensure that the deviation between the actual expansion amount and the theoretical expansion amount of the cavity structure is within a preset stabilization range, thereby collaboratively achieving adaptive narrowing of the laser linewidth, including: Calculate the expansion deviation between the actual expansion amount and the theoretical expansion amount of the cavity structure; If the expansion deviation is greater than the preset stable range, the stable adjustment parameter and the preset positive amplification factor are multiplied to obtain the cooling control parameter; if the expansion deviation is less than the preset stable range, the stable adjustment parameter and the preset negative amplification factor are multiplied to obtain the heating control parameter. Based on the cooling control parameters or the heating control parameters, the temperature value of the optical resonant cavity is adjusted to obtain the expansion deviation within a preset stable range, thereby achieving adaptive narrowing of the laser linewidth.

2. The method according to claim 1, characterized in that, Based on the temperature distribution data, the deformation gradient of the optical resonant cavity is calculated, including: Based on the temperature distribution data, the average temperature value is calculated, and the temperature measurement point with the smallest difference from the average temperature value and located in the central region of the optical resonant cavity is selected as the reference point. The temperature value of the reference point is used as the reference point temperature data. Starting from the reference point, select temperature measurement points within a preset range as comparison points, and calculate the temperature difference and straight-line distance between each comparison point and the reference point. Based on the deformation law of the optical resonant cavity at different temperatures, a deformation coefficient is set, and the temperature difference at each comparison point is multiplied by the deformation coefficient to obtain multiple cavity deformation values; Based on the cavity deformation and corresponding straight-line distance value at each comparison point, multiple unit distance deformation values ​​are obtained, and the unit distance deformation value with the largest value is selected as the deformation gradient of the optical resonant cavity.

3. The method according to claim 1, characterized in that, The deformation gradient is linearly transformed to generate an initial compensation signal. Based on a preset deformation threshold, the amplitude of the initial compensation signal is adjusted to obtain an electrical compensation signal, including: The deformation gradient is linearly transformed to obtain a linear product value. The linear product value is then transformed according to a preset electrical signal conversion rule to obtain an initial compensation signal. Calculate the deformation difference between the deformation gradient and the preset deformation threshold. When the deformation difference is less than or equal to zero, use the preset gain coefficient as the amplitude adjustment coefficient. When the deformation difference is greater than zero, calculate the ratio between the deformation difference and the preset deformation threshold, and add the ratio and the preset gain coefficient to obtain the amplitude adjustment coefficient. The amplitude of the initial compensation signal and the amplitude adjustment coefficient are multiplied to obtain the adjusted amplitude. Based on the adjusted amplitude, an electrical compensation signal is generated.

4. The method according to claim 1, characterized in that, Based on the electrical compensation signal, the cavity mirror spacing of the optical resonant cavity is adjusted to obtain the adjusted cavity mirror spacing, including: The electrical compensation signal is subjected to bandpass filtering to extract the target signal amplitude in the target frequency band; Based on the preset correlation between electrical signal amplitude and mechanical displacement, the target signal amplitude is converted into a displacement adjustment amount; Based on the displacement adjustment amount and the cavity mirror spacing of the optical resonant cavity, the target value for cavity mirror spacing adjustment is calculated. The cavity mirror spacing of the optical resonant cavity is adjusted according to the target value of the cavity mirror spacing to obtain the adjusted cavity mirror spacing.

5. The method according to claim 1, characterized in that, Based on the compensation deviation, the adjusted endoscope spacing is adjusted a second time to obtain the second adjusted endoscope spacing, including: The absolute value of the compensation deviation is compared with the preset deviation threshold. When the absolute value of the compensation deviation is less than or equal to the preset deviation threshold, the adjusted endoscope spacing is taken as the endoscope spacing after the second adjustment. When the absolute value of the compensation deviation is greater than the preset deviation threshold, the compensation deviation and the preset fine-tuning coefficient are multiplied to obtain the secondary fine-tuning displacement. Combined with the adjusted laparoscope spacing, the secondary adjustment target value is calculated. Based on the target value for secondary adjustment, the already adjusted laparoscope spacing is adjusted a second time to obtain the second-adjusted laparoscope spacing.

6. A laser linewidth adaptive narrowing optical resonator design system, characterized in that, include: The acquisition module is used to acquire temperature distribution data on the surface of the optical resonant cavity, the temperature distribution data including the coordinate information and temperature value of each temperature measurement point; The calculation module is used to calculate the deformation gradient of the optical resonant cavity based on the temperature distribution data; The conversion module is used to perform linear conversion processing on the deformation gradient to generate an initial compensation signal, and adjust the amplitude of the initial compensation signal based on a preset deformation threshold to obtain an electrical compensation signal. An adjustment module is used to adjust the cavity mirror spacing of the optical resonant cavity according to the electrical compensation signal, so as to obtain the adjusted cavity mirror spacing; The compensation module is used to compensate for the deformation gradient using the adjusted cavity mirror spacing to offset instantaneous deformation, and at the same time to stabilize the cavity structure of the optical resonant cavity using a preset thermal expansion coefficient, so as to achieve adaptive narrowing of the laser linewidth. The adjusted cavity mirror spacing is used to compensate for the deformation gradient to counteract instantaneous deformation. Simultaneously, a preset thermal expansion coefficient is used to stabilize the cavity structure of the optical resonant cavity, thereby collaboratively achieving adaptive narrowing of the laser linewidth. This includes: Calculate the difference between the displacement adjustment amount and the deformation gradient, and use the difference as the compensation deviation amount; Based on the compensation deviation, the adjusted endoscope spacing is adjusted a second time to obtain the second adjusted endoscope spacing to counteract instantaneous deformation. Based on the difference between the average temperature of the optical resonant cavity and the preset reference temperature, and combined with the preset thermal expansion coefficient, the theoretical expansion of the cavity structure of the optical resonant cavity is calculated. Based on the theoretical expansion amount, determine the stability adjustment parameters of the cavity structure; Based on the aforementioned stable adjustment parameters, the cavity structure is subjected to stable adjustment processing so that the deviation between the actual expansion amount and the theoretical expansion amount of the cavity structure is within a preset stable range, so as to collaboratively achieve adaptive narrowing of the laser linewidth. Based on the aforementioned stabilization parameters, the cavity structure is subjected to stabilization adjustment to ensure that the deviation between the actual expansion amount and the theoretical expansion amount of the cavity structure is within a preset stabilization range, thereby collaboratively achieving adaptive narrowing of the laser linewidth, including: Calculate the expansion deviation between the actual expansion amount and the theoretical expansion amount of the cavity structure; If the expansion deviation is greater than the preset stable range, the stable adjustment parameter and the preset positive amplification factor are multiplied to obtain the cooling control parameter; if the expansion deviation is less than the preset stable range, the stable adjustment parameter and the preset negative amplification factor are multiplied to obtain the heating control parameter. Based on the cooling control parameters or the heating control parameters, the temperature value of the optical resonant cavity is adjusted to obtain the expansion deviation within a preset stable range, thereby achieving adaptive narrowing of the laser linewidth.

7. A computing device, characterized in that, It includes a processing component and a storage component; the storage component stores one or more computer instructions; the one or more computer instructions are invoked and executed by the processing component to implement the laser linewidth adaptive narrowing optical resonator design method as described in any one of claims 1 to 5.

8. A computer storage medium, characterized in that, The device contains a computer program that, when executed by a computer, implements a laser linewidth adaptive narrowing optical resonator design method as described in any one of claims 1 to 5.

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