Narrow-linewidth single-frequency laser frequency stabilization system and method based on Gaussian filter

Abstract

The invention provides a narrow-linewidth single-frequency laser frequency stabilization system and method based on a Gaussian filter, and the system employs the Gaussian filter to reduce the optical power of single-frequency laser, and employs the frequency selection characteristic of the Gaussian filter, the frequency spectrum of the single-frequency laser is a single narrow peak, and the frequency stability of the single-frequency laser is improved. When laser frequency passes through a designed Gaussian filter (the fluctuation range of a frequency-stabilized laser source is only on the left side of the center frequency of the Gaussian filter), laser signals can be reduced according to a Gaussian function rule, and along with frequency change, attenuation degrees are different and monotonically change, so that output optical power is different, and the output optical power is changed. And the optical power is compared with the optical power of a preset frequency stabilization target (a half-high point on the left side of a Gaussian filter) to obtain the deviation of the laser source relative to the target frequency stabilization frequency, so that the laser frequency is correspondingly adjusted to achieve the frequency stabilization purpose. The high-sensitivity optical power detection is realized, the response speed and the frequency stabilization precision of the system are improved, and the system is simple in structure and low in maintenance cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser frequency stabilization, and in particular to a Gaussian filter-based narrow-linewidth single-frequency laser frequency stabilization system and method. BACKGROUND

[0002] Narrow-linewidth single-frequency lasers have important applications in precision measurement, optical communication, quantum optics, and other fields due to their excellent frequency stability and low noise characteristics. However, narrow-linewidth single-frequency lasers are easily affected by factors such as temperature fluctuations and mechanical vibrations during operation, leading to output wavelength drift and affecting system performance. In recent years, researchers have been working to improve the frequency stability of narrow-linewidth single-frequency lasers to meet the needs of high-precision applications.

[0003] Existing frequency stabilization methods mainly include saturated absorption frequency stabilization and Fabry-Perot (F-P) cavity frequency stabilization, but these methods have the problems of complex system and high cost. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a Gaussian filter-based narrow-linewidth single-frequency laser frequency stabilization system and method to solve the above technical problems.

[0005] To achieve the above purpose, the first aspect of the present application provides a Gaussian filter-based narrow-linewidth single-frequency laser frequency stabilization system, which comprises:

[0006] a single-frequency laser for outputting single-frequency laser;

[0007] a Gaussian filter for reducing the optical power of the single-frequency laser; wherein the target frequency of the single-frequency laser corresponds to the left half-height point of the Gaussian distribution curve of the Gaussian filter;

[0008] a first optical power detection module for detecting the optical power of the reduced single-frequency laser;

[0009] an adjustment module connected to the frequency adjustment end of the single-frequency laser;

[0010] a control module for calculating the difference between the optical power detected by the first optical power detection module and the target optical power of the single-frequency laser, and controlling the adjustment module to adjust the frequency of the single-frequency laser according to the difference.

[0011] In one embodiment, the system further comprises:

[0012] a light splitting module for splitting the single-frequency laser into a first laser and a second laser, the first laser entering the Gaussian filter;

[0013] a second optical power detection module configured to detect optical power of the second laser;

[0014] The control module is configured to control the adjustment module to adjust the frequency of the single-frequency laser when the second optical power detection module detects fluctuation in the optical power of the second laser.

[0015] In one embodiment, the light splitting module comprises a fiber coupler, and the second optical power detection module comprises a second optical power meter.

[0016] In one embodiment, the adjustment module comprises a piezoelectric ceramic driver.

[0017] The control module is configured to calculate a difference between the optical power detected by the first optical power detection module and a target optical power of the single-frequency laser, and control the adjustment module to adjust the frequency of the single-frequency laser according to the difference, comprising:

[0018] When the optical power detected by the first optical power detection module is less than the target optical power of the single-frequency laser, the control module controls the piezoelectric ceramic driver to decrease the voltage to cause the wavelength of the single-frequency laser to red shift, so as to increase the optical power of the single-frequency laser.

[0019] When the optical power detected by the first optical power detection module is greater than the target optical power of the single-frequency laser, the control module controls the piezoelectric ceramic driver to increase the voltage to cause the wavelength of the single-frequency laser to red shift, so as to decrease the optical power of the single-frequency laser.

[0020] In one embodiment, the control module is further configured to trigger an alarm when the optical power detected by the first optical power detection module is out of limit or the voltage of the piezoelectric ceramic driver is saturated.

[0021] In one embodiment, the control module controls the adjustment module to adjust the frequency of the single-frequency laser based on a PID control algorithm, a fuzzy control algorithm or a neural network control algorithm.

[0022] In one embodiment, the first optical power detection module comprises a first optical power meter.

[0023] In one embodiment, the control module comprises a digital signal processor and / or a field programmable gate array.

[0024] Based on the same inventive concept, a second aspect of the present application provides a method for stabilizing a narrow-linewidth single-frequency laser based on a Gaussian filter, applied to the narrow-linewidth single-frequency laser stabilizing system based on the Gaussian filter as described in any of the above embodiments, which comprises:

[0025] The single-frequency laser is used to output a single-frequency laser.

[0026] The optical power of the single-frequency laser is reduced using the Gaussian filter; wherein the target frequency of the single-frequency laser corresponds to the left half-maximum of the Gaussian distribution curve of the Gaussian filter.

[0027] The optical power of the reduced single-frequency laser is detected using the first optical power detection module.

[0028] The control module calculates the difference between the optical power detected by the first optical power detection module and the target optical power of the single-frequency laser, and controls the adjustment module to adjust the frequency of the single-frequency laser based on the difference.

[0029] In one embodiment, the narrow-linewidth single-frequency laser frequency stabilization system based on a Gaussian filter further includes a beam splitting module and a second optical power detection module; the method further includes:

[0030] The single-frequency laser is split into a first laser and a second laser using the beam splitting module, and the first laser enters the Gaussian filter.

[0031] The optical power of the second laser is detected using a second optical power detection module.

[0032] When the second optical power detection module detects a fluctuation in the optical power of the second laser, the control module controls the adjustment module to adjust the frequency of the single-frequency laser.

[0033] As can be seen from the above, the narrow-linewidth single-frequency laser frequency stabilization system based on Gaussian filter provided in this application reduces the optical power of the single-frequency laser using a Gaussian filter. The target frequency of the single-frequency laser corresponds to the left half-maximum of the Gaussian distribution curve of the Gaussian filter. The transmission characteristics of the Gaussian filter are used to achieve optical power detection, thereby realizing wavelength detection. The steep slope of the left half-maximum of the Gaussian distribution curve is used to achieve high-sensitivity optical power detection, improving the system's response speed and frequency stabilization accuracy. Furthermore, the system has a simple structure and low maintenance cost. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 A schematic diagram of a narrow-linewidth single-frequency laser frequency stabilization system based on a Gaussian filter provided in an embodiment of this application;

[0036] Figure 2 A schematic diagram of a narrow-linewidth single-frequency laser frequency stabilization system based on a Gaussian filter, provided as another embodiment of this application;

[0037] Figure 3 A flowchart of a narrow-linewidth single-frequency laser frequency stabilization method based on a Gaussian filter, provided in another embodiment of this application.

[0038] Marker explanation:

[0039] 10. Single-frequency laser; 20. Gaussian filter; 30. First optical power detection module; 40. Adjustment module; 50. Control module; 60. Beam splitting module; 70. Second optical power detection module. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0041] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] Reference Figure 1 As shown, one embodiment of this application provides a narrow-linewidth single-frequency laser frequency stabilization system based on a Gaussian filter, which includes a single-frequency laser 10, a Gaussian filter 20, a first optical power detection module 30, an adjustment module 40, and a control module 50.

[0043] A single-frequency laser 10 is used to output single-frequency laser light; a Gaussian filter 20 is used to reduce the optical power of the single-frequency laser light; wherein, the target frequency of the single-frequency laser 10 corresponds to the left half-maximum of the Gaussian distribution curve of the Gaussian filter 20; a first optical power detection module 30 is used to detect the optical power of the reduced single-frequency laser light; an adjustment module 40 is connected to the frequency adjustment terminal of the single-frequency laser 10; a control module 50 is used to calculate the difference between the optical power detected by the first optical power detection module 30 and the target optical power of the single-frequency laser 10, and control the adjustment module 40 to adjust the frequency of the single-frequency laser 10 according to the difference.

[0044] The narrow-linewidth single-frequency laser frequency stabilization system based on a Gaussian filter provided in this application reduces the optical power of the single-frequency laser using a Gaussian filter 20. The target frequency of the single-frequency laser 10 corresponds to the left half-maximum of the Gaussian distribution curve of the Gaussian filter 20. The transmission characteristics of the Gaussian filter 20 are used to achieve optical power detection, thereby achieving wavelength detection. The steep slope of the left half-maximum of the Gaussian distribution curve is used to achieve high-sensitivity optical power detection, which improves the system's response speed and frequency stabilization accuracy. Furthermore, the system has a simple structure and low maintenance cost.

[0045] The method of reducing the optical power of a single-frequency laser using a Gaussian filter leverages the frequency selectivity of the filter. A single-frequency laser has a narrow, single-peak spectrum. When the laser frequency passes through a designed Gaussian filter (the fluctuation range of the frequency-stabilized laser source is only to the left of the center frequency of the Gaussian filter), the laser signal is reduced according to a Gaussian function. The attenuation varies monotonically with frequency, resulting in different output optical powers. By comparing the output power with the preset frequency stabilization target (the left half-maximum of the Gaussian distribution curve of the filter), the deviation of the laser source from the target frequency can be obtained. This deviation can then be adjusted using an adjustment module to achieve frequency stabilization. In practice, the frequency deviation can be controlled by adjusting the piezoelectric ceramic voltage or the filter's center frequency and slope (e.g., mechanical tuning, electro-optic modulation), thus achieving precise adjustment of the single-frequency laser frequency. This method features stepless adjustment, low loss, and good selectivity, making it suitable for scenarios requiring precise laser power adjustment.

[0046] In one embodiment, the adjustment module 40 includes a piezoelectric ceramic actuator; the control module 50 is used to calculate the difference between the optical power detected by the first optical power detection module 30 and the target optical power of the single-frequency laser 10, and to control the adjustment module 40 to adjust the frequency of the single-frequency laser 10 according to the difference, specifically including:

[0047] When the optical power detected by the first optical power detection module 30 is less than the target optical power of the single-frequency laser 10, the control module 50 controls the piezoelectric ceramic driver to reduce the voltage to redshift the wavelength of the single-frequency laser 10, thereby increasing the optical power of the single-frequency laser 10.

[0048] When the optical power detected by the first optical power detection module 30 is greater than the target optical power of the single-frequency laser 10, the control module 50 controls the piezoelectric ceramic driver to increase the voltage, causing a red shift in the wavelength of the single-frequency laser 10, thereby reducing the optical power of the single-frequency laser 10. This achieves frequency stabilization.

[0049] The core of using a piezoelectric ceramic actuator to adjust the laser frequency lies in altering key parameters of the laser resonant cavity through precise displacement generated by its piezoelectric effect, thereby controlling the output frequency. Specifically, the piezoelectric ceramic actuator exhibits minute expansion and contraction under voltage drive (inverse piezoelectric effect, with displacement accuracy down to the nanometer level). Coupled with core components of the laser resonant cavity such as mirrors and crystals, it is possible to precisely change the cavity length (e.g., the cavity length of a Fabry-Perot cavity) or the intracavity optical path (e.g., adjusting the stress of the gain medium). Since the laser's output frequency is determined by the longitudinal mode condition of the resonant cavity (frequency f = c / (2nL), where c is the speed of light, n is the refractive index of the medium, and L is the cavity length), minute changes in the cavity length or refractive index directly lead to frequency shifts (for example, a 1-nanometer change in cavity length can cause a frequency change of approximately several hundred megahertz in the visible light band). Through precise control of the driving voltage, continuous and high-precision tuning of the laser frequency can be achieved, offering fast response speeds (microseconds) and high stability.

[0050] In one embodiment, the control module 50 is also used to trigger an alarm when the optical power exceeds the limit or the voltage of the piezoelectric ceramic driver is saturated, so as to effectively protect the frequency stabilization system of the narrow linewidth single-frequency laser based on the Gaussian filter and avoid component damage.

[0051] Optionally, the control module 50 adjusts the frequency of the single-frequency laser 10 based on the control and adjustment module 40, such as the PID (proportional-integral-derivative) control algorithm, fuzzy control algorithm, or neural network control algorithm.

[0052] When the control module 50 controls the frequency of the single-frequency laser 10 based on the PID control algorithm, it first decomposes the deviation signal into three components: proportional, integral, and derivative. The proportional component outputs an adjustment signal quickly according to the current deviation magnitude, the integral component accumulates the deviation to eliminate steady-state error, and the derivative component suppresses overshoot in advance based on the deviation change rate. After weighted calculation, the three components generate a control signal, which drives the piezoelectric ceramic driver to fine-tune the laser resonant cavity length (or other frequency-sensitive parameters). Through dynamic feedback, the frequency deviation is continuously corrected, and finally the output frequency of the single-frequency laser is stabilized near the target value, achieving high-precision and high-stability frequency control.

[0053] In this process, when the control module 50 controls the frequency of the single-frequency laser 10 based on the fuzzy control algorithm, it first converts the frequency deviation and its rate of change into fuzzy linguistic variables (such as "positive large amplitude" and "negative small amplitude"). Then, it infers based on the fuzzy rules preset by expert experience (such as "if the deviation is positive and the rate of change is positive, then the control quantity is greatly reduced") to obtain the fuzzy control quantity. After defuzzification, the result is a specific driving signal that drives the piezoelectric ceramic and other actuators to adjust the laser resonant cavity parameters. This algorithm does not rely on a precise mathematical model and can flexibly cope with nonlinear interferences such as temperature fluctuations and vibrations. By dynamically adjusting the control strategy, it stabilizes the laser frequency within the target range.

[0054] When the control module 50 controls the frequency of the single-frequency laser 10 based on the neural network control algorithm, it uses a trained neural network model (such as a BP network) to perform nonlinear mapping processing on the input parameters. The model learns the complex relationship between frequency deviation and control quantity through a large amount of historical data, and can autonomously generate control signals that adapt to the current state to drive actuators such as piezoelectric ceramics to adjust the resonant cavity parameters. Its core advantage lies in its self-learning and adaptive capabilities, which can dynamically adapt to nonlinear factors such as laser aging and environmental changes, continuously optimize the control strategy, and finally stabilize the frequency at the target value.

[0055] Optionally, the first optical power detection module 30 includes a first optical power meter, which helps reduce costs. The optical power meter converts optical signals into electrical signals using a detector (such as a photodiode or pyroelectric detector), then amplifies, processes, and calibrates the signal, finally displaying the measurement result in power units (such as watts, decibels, and milliwatts). Based on the measurement wavelength range, optical power meters can be classified as visible light power meters, infrared power meters, etc.

[0056] In one embodiment, the control module 50 includes a digital signal processor and / or a field-programmable gate array, etc. This enables high-speed signal processing and improves dynamic response speed.

[0057] Reference Figure 2 As shown, in one embodiment, the narrow-linewidth single-frequency laser frequency stabilization system based on a Gaussian filter further includes a beam splitting module 60 and a second optical power detection module 70. The beam splitting module 60 is used to split the single-frequency laser into a first laser and a second laser, with the first laser entering the Gaussian filter 20. The second optical power detection module 70 is used to detect the optical power of the second laser. The control module 50 is used to control the adjustment module 40 to adjust the frequency of the single-frequency laser 10 when the second optical power detection module 70 detects fluctuations in the optical power of the second laser, thereby automatically compensating for the influence of the single-frequency laser 10's own light intensity changes on the signal.

[0058] Optionally, the beam splitting module 60 includes an optical fiber coupler. When the optical fiber coupler performs beam splitting, it uses a special optical structure (such as fused abdominis, planar waveguide, etc.) to distribute the optical signal in the input fiber to two or more output fibers according to a preset ratio. When the optical signal enters the coupler from the input end, the mode fields of the light overlap and interact within the coupling region. Part of the light energy is transferred through evanescent wave coupling or mode interference, ultimately allowing different output ends to obtain a specific ratio of optical power (such as a 1:1 or 1:9 splitting ratio). This beam splitting method features low insertion loss, high stability, and good wavelength compatibility. It requires no additional mechanical adjustment components and can efficiently achieve split transmission of optical signals in scenarios such as optical communication and laser measurement. Further, in this embodiment, the first laser and the second laser are obtained by splitting a single-frequency laser at a 9:1 ratio using an optical fiber coupler.

[0059] In other embodiments, the beam splitting module 60 may also be a prism beam splitter, a grating beam splitter, a semi-transparent mirror (beam splitter), or a wavelength division multiplexer, etc.

[0060] Among them, prism beam splitters utilize the difference in refractive index of different wavelengths of light in a prism to achieve beam splitting through different refraction angles. They are commonly used in spectral analysis to separate multi-wavelength light signals; for example, a triangular prism can decompose white light into seven colors. Grating beam splitters are based on the principle of light diffraction. When light shines on a grating surface with numerous parallel and equidistant grooves, different wavelengths of light are separated due to different diffraction angles. They are widely used in monochromators, spectrometers, and other equipment, enabling high-precision wavelength splitting. Semi-transparent and semi-reflective mirrors, by coating a glass substrate, allow part of the incident light to be transmitted and part to be reflected, splitting the light in a fixed ratio (e.g., 50:50). They are commonly used in interferometric experiments, lidar, and other scenarios for beam splitting and combining optical paths. Wavelength division multiplexers, while primarily used for wavelength combining and splitting, are essentially special beam splitting devices that can separate light signals of different wavelengths into different optical paths, enabling the extraction of multiple optical signals transmitted through a single optical fiber in optical communication.

[0061] Optionally, the second optical power detection module 70 includes a second optical power meter, which helps to reduce costs.

[0062] Optionally, the system supports online parameter adjustment, allowing users to modify key parameters such as PID parameters and target optical power in real time via a GUI interface.

[0063] Reference Figure 3 As shown, based on the same inventive concept, this application also provides a method for frequency stabilization of a narrow-linewidth single-frequency laser based on a Gaussian filter, applicable to the frequency stabilization system of a narrow-linewidth single-frequency laser based on a Gaussian filter in any of the above embodiments. The method includes the following steps:

[0064] Step S10: Output single-frequency laser using single-frequency laser 10;

[0065] Step S20: Reduce the optical power of the single-frequency laser using a Gaussian filter 20; wherein, the target frequency of the single-frequency laser 10 corresponds to the left half-maximum of the Gaussian distribution curve of the Gaussian filter 20.

[0066] Step S30: Detect the optical power of the reduced single-frequency laser using the first optical power detection module 30;

[0067] Step S40: The control module 50 calculates the difference between the optical power detected by the first optical power detection module 30 and the target optical power of the single-frequency laser 10, and adjusts the frequency of the single-frequency laser 10 according to the difference by the control adjustment module 40.

[0068] The frequency stabilization method for narrow-linewidth single-frequency lasers based on Gaussian filters provided in this application reduces the optical power of the single-frequency laser using a Gaussian filter 20. The target frequency of the single-frequency laser 10 corresponds to the left half-maximum of the Gaussian distribution curve of the Gaussian filter 20. The transmission characteristics of the Gaussian filter 20 are used to achieve optical power detection, thereby achieving wavelength detection. The steep slope of the left half-maximum of the Gaussian distribution curve is used to achieve high-sensitivity optical power detection, improving the system's response speed and frequency stabilization accuracy. Furthermore, the system has a simple structure and low maintenance cost.

[0069] In one embodiment, the frequency stabilization method for a narrow-linewidth single-frequency laser based on a Gaussian filter further includes the following steps:

[0070] Step S50: The single-frequency laser is split into a first laser and a second laser using the beam splitting module 60. The first laser enters a Gaussian filter. Step S50 is after step S10 and before step S20.

[0071] Step S60: Detect the optical power of the second laser using the second optical power detection module 70;

[0072] Step S70: When the second optical power detection module 70 detects fluctuations in the optical power of the second laser, the control module 50 controls the adjustment module 40 to adjust the frequency of the single-frequency laser 10. This automatically compensates for the influence of changes in the light intensity of the single-frequency laser 10 on the signal.

[0073] The frequency stabilization method for narrow-linewidth single-frequency lasers based on Gaussian filters in this embodiment has the beneficial effects of the system embodiments described above, and will not be repeated here.

[0074] In one embodiment, the frequency stabilization method for a narrow-linewidth single-frequency laser based on a Gaussian filter further includes the following steps: recording power, error, and control voltage data in real time during the frequency stabilization process, and displaying the system status through a GUI interface.

[0075] In one embodiment, the narrow-linewidth single-frequency laser frequency stabilization method based on Gaussian filters further includes the following steps: periodically saving system operation data, including timestamps, optical power, error signals, and control voltages, for subsequent analysis and optimization.

[0076] It should be noted that some embodiments of this application have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. In addition, the processes depicted in the drawings do not necessarily require the specific order or sequential order shown to achieve the desired result.

[0077] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the above embodiments of this application, which are not provided in detail for the sake of brevity.

[0078] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A frequency stabilization system for a narrow-linewidth single-frequency laser based on a Gaussian filter, characterized in that, include: A single-frequency laser, wherein the single-frequency laser is used to output a single-frequency laser; A Gaussian filter is used to reduce the optical power of the single-frequency laser; wherein the target frequency of the single-frequency laser corresponds to the left half-maximum of the Gaussian distribution curve of the Gaussian filter. The first optical power detection module is used to detect the optical power of the reduced single-frequency laser. An adjustment module is connected to the frequency adjustment terminal of the single-frequency laser. The control module is used to calculate the difference between the optical power detected by the first optical power detection module and the target optical power of the single-frequency laser, and to control the adjustment module to adjust the frequency of the single-frequency laser according to the difference.

2. The frequency stabilization system for a narrow-linewidth single-frequency laser based on a Gaussian filter according to claim 1, characterized in that, Also includes: A beam splitting module is used to split the single-frequency laser into a first laser and a second laser, with the first laser entering the Gaussian filter; The second optical power detection module is used to detect the optical power of the second laser. The control module is used to control the adjustment module to adjust the frequency of the single-frequency laser when the second optical power detection module detects a fluctuation in the optical power of the second laser.

3. The frequency stabilization system for a narrow-linewidth single-frequency laser based on a Gaussian filter according to claim 2, characterized in that, The optical splitting module includes an optical fiber coupler, and the second optical power detection module includes a second optical power meter.

4. The frequency stabilization system for a narrow-linewidth single-frequency laser based on a Gaussian filter according to claim 1, characterized in that, The adjustment module includes a piezoelectric ceramic actuator; The control module is used to calculate the difference between the optical power detected by the first optical power detection module and the target optical power of the single-frequency laser, and to control the adjustment module to adjust the frequency of the single-frequency laser according to the difference, including: When the optical power detected by the first optical power detection module is less than the target optical power of the single-frequency laser, the control module controls the piezoelectric ceramic driver to reduce the voltage to redshift the wavelength of the single-frequency laser, thereby increasing the optical power of the single-frequency laser. When the optical power detected by the first optical power detection module is greater than the target optical power of the single-frequency laser, the control module controls the piezoelectric ceramic driver to increase the voltage to redshift the wavelength of the single-frequency laser, thereby reducing the optical power of the single-frequency laser.

5. The frequency stabilization system for a narrow-linewidth single-frequency laser based on a Gaussian filter according to claim 4, characterized in that, The control module is also used to trigger an alarm when the optical power detected by the first optical power detection module exceeds the limit or when the voltage of the piezoelectric ceramic driver is saturated.

6. The frequency stabilization system for a narrow-linewidth single-frequency laser based on a Gaussian filter according to claim 1, characterized in that, The control module controls the adjustment module to adjust the frequency of the single-frequency laser based on a PID control algorithm, a fuzzy control algorithm, or a neural network control algorithm.

7. The frequency stabilization system for a narrow-linewidth single-frequency laser based on a Gaussian filter according to claim 1, characterized in that, The first optical power detection module includes a first optical power meter.

8. The frequency stabilization system for a narrow-linewidth single-frequency laser based on a Gaussian filter according to claim 1, characterized in that, The control module includes a digital signal processor and / or a field-programmable gate array.

9. A method for frequency stabilization of a narrow-linewidth single-frequency laser based on a Gaussian filter, applied to the frequency stabilization system for a narrow-linewidth single-frequency laser based on a Gaussian filter as described in any one of claims 1-8, characterized in that, include: The single-frequency laser is used to output a single-frequency laser. The optical power of the single-frequency laser is reduced using the Gaussian filter; wherein the target frequency of the single-frequency laser corresponds to the left half-maximum of the Gaussian distribution curve of the Gaussian filter. The optical power of the reduced single-frequency laser is detected using the first optical power detection module. The control module calculates the difference between the optical power detected by the first optical power detection module and the target optical power of the single-frequency laser, and controls the adjustment module to adjust the frequency of the single-frequency laser based on the difference.

10. The method for frequency stabilization of a narrow-linewidth single-frequency laser based on a Gaussian filter according to claim 9, characterized in that, The narrow-linewidth single-frequency laser frequency stabilization system based on a Gaussian filter further includes a beam splitting module and a second optical power detection module; the method further includes: The single-frequency laser is split into a first laser and a second laser using the beam splitting module, and the first laser enters the Gaussian filter. The optical power of the second laser is detected using a second optical power detection module. When the second optical power detection module detects a fluctuation in the optical power of the second laser, the control module controls the adjustment module to adjust the frequency of the single-frequency laser.

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