Multi-wavelength frequency comb laser working point screening method and system

Abstract

The invention provides a multi-wavelength frequency comb laser working point screening method. The method comprises the following steps: S1, setting a starting current, a current interval, a termination current, a starting voltage, a voltage interval and a termination voltage according to threshold current performance parameters and use requirements of a to-be-screened multi-wavelength frequency comb laser; and S2, according to the initial current, the current interval, the termination current, the initial voltage, the voltage interval and the termination voltage set in the step S1, controlling a current source and a voltage source to output current and voltage to the multi-wavelength frequency comb laser to be screened for multiple times according to the current interval and the voltage interval, acquiring output spectral information of the multi-wavelength frequency comb laser under each current and voltage condition by adopting a spectrograph; s3, automatically analyzing the number of the optical frequency combs in each piece of spectral information through a computer by adopting a preset spectral analysis method, and summarizing the numbers of the optical frequency combs of all the spectral information to make a working point diagram; and S4, current and voltage corresponding to the point with the maximum number of optical frequency combs in the working point diagram are selected as working points.

Description

Technical Field

[0001] The present invention relates to the field of lasers, in particular to a laser operating point screening technology, and more particularly to a multi-wavelength frequency comb laser operating point screening method and system. Background Art

[0002] With the rapid development of Internet technology, the amount of data brought by communication has increased exponentially, which has put forward new requirements for data storage and transmission technology. The exponential growth of data volume has driven the continuous increase in bandwidth requirements for optical communications and data centers. Compared with coherent communication technology suitable for long-distance information transmission, wavelength division multiplexing technology has gradually become mainstream due to its high bandwidth and low cost. In the future, 800G optical modules are expected to adopt 8-channel wavelength division multiplexing technology.

[0003] The multi-wavelength frequency comb laser adjusts the final output of the multi-wavelength light source by controlling the value of the injection current and the reverse bias voltage. The multi-wavelength frequency comb laser can achieve multiple wavelengths output by a single laser, which can effectively solve the problems of multi-wavelength and module power consumption. However, how to screen the optimal working conditions of the multi-wavelength frequency comb laser is a challenge for the successful commercialization of the laser.

[0004] At present, the working point screening of multi-wavelength frequency comb lasers is mainly achieved by manually adjusting the injection current and reverse bias voltage input to the laser. Although the usable working conditions can be screened out, the manual screening has low precision and may miss the best working conditions. At the same time, it takes a lot of time and is inefficient. Therefore, how to efficiently and accurately screen the working point of multi-wavelength frequency comb lasers is an urgent problem to be solved in order to achieve the widespread application of multi-wavelength frequency comb lasers.

[0005] It should be noted that this background technology is only used to introduce the relevant information of the present invention to help understand the technical solution of the present invention, but it does not mean that the relevant information is necessarily the prior art. If there is no evidence that the relevant information has been disclosed before the application date of the present invention, the relevant information shall not be regarded as the prior art. Summary of the invention

[0006] Therefore, the object of the present invention is to overcome the above-mentioned defects of the prior art and provide a method and system for screening the operating point of a multi-wavelength frequency comb laser.

[0007] The objective of the present invention is achieved through the following technical solutions:

[0008] According to a first aspect of the present invention, a method for screening working points of a multi-wavelength frequency comb laser is provided, which is used to screen the optimal working point of the multi-wavelength frequency comb laser. The method comprises: S1, setting a starting current, a current interval, a termination current, a starting voltage, a voltage interval, and a termination voltage according to the threshold current performance parameters and usage requirements of the multi-wavelength frequency comb laser to be screened; S2, according to the starting current, current interval, termination current, starting voltage, voltage interval, and termination voltage set in step S1, controlling a current source and a voltage source to output current and voltage to the multi-wavelength frequency comb laser to be screened multiple times according to the current interval and the voltage interval, and using a spectrometer to collect output spectrum information of the multi-wavelength frequency comb laser under the current and voltage conditions each time; wherein the current output by the current source each time is a current within the range of the starting current and the termination current, and the voltage input by the voltage source each time is a voltage within the range of the starting voltage and the termination voltage; S3, using a preset spectrum analysis method to automatically analyze the number of optical frequency combs in each spectrum information through a computer and summarize the number of optical frequency combs in all spectrum information to prepare a working point diagram; S4, selecting the current and voltage corresponding to the point with the largest number of optical frequency combs in the working point diagram as the working point.

[0009] Preferably, in some embodiments of the present invention, the starting current is set to 40mA, the current interval is set to 5-10mA, the ending current is set to 500 mA, the starting voltage is set to 0V, the voltage interval is set to 200mV-500mV, and the ending voltage is 5V.

[0010] Preferably, the step S2 comprises: S21, adjusting the output of the current source to the starting current, controlling the output of the voltage source to the starting voltage, using a spectrometer to collect the output spectrum information of the multi-wavelength frequency comb laser under the starting and starting voltage conditions at this time, and executing S22; S22, controlling the current source to keep the current output starting current unchanged, controlling the voltage output of the voltage source to increase a voltage interval based on the previous voltage, collecting the output spectrum information of the multi-wavelength frequency comb laser under the current current and voltage conditions, and executing S23; S23, repeating step S22 until the output voltage of the voltage source reaches the termination voltage and executing step S24; S24, adjusting the current source to the end voltage, and executing step S25. The output of the current source increases a current interval based on the previous time, the output of the voltage source is controlled to be the starting voltage, and a spectrometer is used to collect the output spectrum information of the multi-wavelength frequency comb laser under the starting and starting voltage conditions at this time and execute S25; S25, control the current source to keep the current output current unchanged, control the voltage output of the voltage source to increase a voltage interval based on the previous voltage, and collect the output spectrum information of the multi-wavelength frequency comb laser under the current current and voltage conditions; S26, repeat step S25 until the output voltage of the voltage source reaches the termination voltage and execute S27; S27, repeat S24 until the output of the current source reaches the termination current.

[0011] Preferably, all spectral information is stored in a unified file format.

[0012] Preferably, all spectral information is stored in any storage format.

[0013] Preferably, in step S3, the number of optical frequency combs in each spectral information is analyzed in the following manner: the maximum power peak in each spectral information is obtained; all peaks except the maximum power peak in each spectral information are obtained, and the peaks with powers within 3dB below the maximum power are screened out as valid peaks and the number of valid peaks is recorded; the interval between every two valid peaks and the number of peak interval errors are recorded, and it is determined whether the number of peak interval errors in each spectrum is less than or equal to the interval error number threshold range, the number of optical frequency combs of the spectrum whose peak interval error number is less than or equal to the interval number threshold is recorded as its corresponding number of valid peaks, and the number of optical frequency combs of other spectra is recorded as 0, wherein the peak interval error refers to the peak interval where the distance between two valid peaks does not meet the stability requirement.

[0014] Preferably, it is characterized in that the interval error number threshold is 3.

[0015] Preferably, in step S3, the number of optical frequency combs of all spectral information and their corresponding voltage and current conditions are plotted into a grid diagram, and the number of optical frequency combs from small to large is represented by colors from light to dark, so as to draw a working point diagram of the multi-wavelength frequency comb laser.

[0016] According to a second aspect of the present invention, there is provided a multi-wavelength frequency comb laser operating point screening system based on the method described in the first aspect of the present invention, which is used to screen the optimal operating point of the multi-wavelength frequency comb laser, and the system comprises: a current source, which is configured to output current to the multi-wavelength frequency comb laser to be screened according to a preset starting current, current interval, and termination current; a voltage source, which is configured to output voltage to the multi-wavelength frequency comb laser to be screened according to a preset starting voltage, voltage interval, and termination voltage; a spectrometer, which is used to collect output spectral information of the multi-wavelength frequency comb laser under different current and voltage conditions; a spectral information storage module, which is used to store the spectral information collected by the spectrometer in a unified file format; a spectral information analysis module, which is used to analyze the number of optical frequency combs in each spectral information stored in the spectral information storage module and summarize the number of optical frequency combs of all spectral information to prepare an operating point diagram, and select the current and voltage corresponding to the point with the largest number of optical frequency combs in the operating point diagram as the operating point.

[0017] Compared with the prior art, the advantages of the present invention are: through the scheme of the present invention, the optimal working conditions of the multi-wavelength frequency comb laser can be quickly and accurately screened by directly using the commonly used laboratory equipment, and a frequency comb light source with low power consumption and high output power can be obtained, thereby improving the performance of the laser, including: 1. Improving efficiency, by optimizing the working point search method, efficiently screening the working performance of the laser under various working conditions; 2. Enhancing accuracy, reducing the fluctuation of working performance caused by the instability of the working point, and improving the accuracy of the test results; 3. Simplifying the adjustment process, the method of the present invention uses a large number of computer programs, reduces the technical requirements for operators, and makes the working point screening simpler and more direct, thereby speeding up the test speed. In addition, the scheme of the present invention uses the test instruments commonly used in optical testing laboratories, and tests through computer control, which can save labor costs, material costs, reduce production costs, and improve production efficiency. The operation of each instrument is controlled by a computer, and the spectrum data obtained is automatically processed using the optimized algorithm, so the method has the advantages of fast screening speed and high accuracy. The scheme of the present invention is not only suitable for the working point screening of multi-wavelength frequency comb lasers, but also applicable to multi-wavelength lasers that can use current and voltage to adjust the output laser. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The embodiments of the present invention are further described below with reference to the accompanying drawings, in which:

[0019] Figure 1 A schematic diagram of a spectrum acquisition process according to an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of a spectrum analysis process according to an embodiment of the present invention;

[0021] Figure 3 Schematic diagram of spectrum statistics results according to an embodiment of the present invention. Specific embodiments

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] As mentioned in the background technology section, the multi-wavelength frequency comb lasers in the prior art mainly screen the working points manually, which has low screening precision and may miss the best working conditions. It also takes a lot of time and is inefficient. To this end, the present invention proposes a more efficient and accurate multi-wavelength frequency comb laser screening scheme. In the scheme of the present invention, through the joint control of multiple optical instruments, the screening method is optimized at the same time, and a data processing module is used to achieve efficient working point screening, providing a solid foundation for the subsequent industrialization and scale-up of multi-wavelength light sources.

[0024] In short, the present invention utilizes a test instrument control method and a data processing algorithm to achieve rapid and accurate screening of the operating point of a wide spectrum frequency comb laser, thereby improving the performance of the laser. In summary, the present invention provides a method for screening a multi-wavelength frequency comb laser working point, which is used to screen the optimal working point of the multi-wavelength frequency comb laser. The method comprises: S1, setting a starting current, a current interval, a termination current, a starting voltage, a voltage interval, and a termination voltage according to the threshold current performance parameters and usage requirements of the multi-wavelength frequency comb laser to be screened; S2, according to the starting current, current interval, termination current, starting voltage, voltage interval, and termination voltage set in step S1, controlling a current source and a voltage source to output current and voltage to the multi-wavelength frequency comb laser to be screened multiple times according to the current interval and the voltage interval, and using a spectrometer to collect output spectrum information of the multi-wavelength frequency comb laser under the current and voltage conditions each time; wherein, the current output by the current source each time is a current within the range of the starting current and the termination current, and the voltage input by the voltage source each time is a voltage within the range of the starting voltage and the termination voltage; S3, using a preset spectrum analysis method to automatically analyze the number of optical frequency combs in each spectrum information through a computer and summarize the number of optical frequency combs of all spectrum information to prepare a working point diagram; S4, selecting the current and voltage corresponding to the point with the largest number of optical frequency combs in the working point diagram as the working point.

[0025] Intuitively speaking, the solution of the present invention mainly includes three stages: spectrum acquisition stage, spectrum analysis stage, and working point selection stage.

[0026] According to one embodiment of the present invention, during the spectrum acquisition phase, the starting current I0 and the ending current I1 are manually input. max and current interval I step , the starting voltage V0 and the ending voltage V max and voltage interval V step And various parameters of spectrum collection. Figure 1 As shown, when starting to collect, follow the following steps: First, control the current source and voltage source to output the starting current I0 and the starting voltage V0 into the multi-wavelength frequency comb laser, that is, control the current I=I0 and the voltage V=V0 of the multi-wavelength frequency comb laser. Then, control the spectrometer to collect the output spectrum information of the laser according to the set collection parameters, store the spectrum information in a unified format (in the embodiment of the present invention, it is stored in the form of a txt text file) into a folder with a preset name, and write the current and voltage conditions of the spectrum into the file name of the txt file, so as to facilitate the search for the setting conditions of the spectrum graph during subsequent data processing. Subsequently, the current output is fixed, and the voltage injected into the laser is increased by a voltage interval V step, use the new input conditions (current remains unchanged, voltage increases by one voltage interval) to collect the spectrum of the output light source under the new working conditions, and also store the spectrum in the same folder. Repeat this process until the voltage reaches the termination voltage. Each time a voltage interval is added, it is necessary to determine whether the voltage V after the voltage interval is increased is less than or equal to the termination voltage V max If yes, collect the spectrum and output the spectrum graph. If no, go directly to the next round. After collecting the spectrum of the termination voltage, increase the current by a current interval I. step , the voltage is adjusted to the starting voltage V0, and the collection of the output spectrum under the input conditions from the starting voltage to the ending voltage is restarted. Each time a current interval is added, it is necessary to determine whether the current after the increased current interval is less than or equal to the ending current I max If yes, continue to collect the spectrum, if not, end directly. Finally, the spectrum information of the output multi-wavelength laser under all current and voltage input conditions can be obtained, and each condition has a txt file storing the working conditions and output result information.

[0027] According to one embodiment of the present invention, the starting current is set to 40mA, the ending current is set to 500mA, and the current interval can be set to be coarse (10mA) or fine (5mA) or other values ​​within 5-10mA according to the accuracy requirements. The starting voltage is set to 0V, the ending voltage is set to 5V, and the voltage interval can be set to be coarse (500mV) or fine (200mV) or other values ​​within 200-500mV according to the accuracy requirements. These data can be further adjusted according to the laser threshold current performance parameters and usage requirements.

[0028] According to one embodiment of the present invention, in the spectrum analysis stage, each spectrum file is processed by using an automatic data processing method, including: obtaining the maximum power peak in each spectrum information; obtaining all peaks except the maximum power peak in each spectrum information, and screening out the peaks with power within 3dB below the maximum power as valid peaks and recording the number of valid peaks (recorded as m); recording the interval between each two valid peaks and recording the number of peak interval errors therein, and judging whether the number of peak interval errors in each spectrum is within the interval error number threshold range, the number of optical frequency combs of the spectrum whose peak interval error number (recorded as n) is less than or equal to the interval error number threshold is recorded as the number of valid peaks corresponding to it, and the number of optical frequency combs of other spectra is recorded as 0, wherein the peak interval error refers to the peak interval whose distance between two peaks does not meet the stability requirements. According to one embodiment of the present invention, the peak interval with an interval greater than 0.7nm or less than 0.5nm is determined as an invalid peak interval, and the intervals within the range of 0.5nm-0.7nm are all valid peak intervals. If the number of peak interval errors corresponding to a spectrum is too large, the spectrum has poor stability, and there are few available optical frequency combs, that is, few available channels. According to an embodiment of the present invention, the interval error number threshold is set to 3. In practice, the interval error number threshold can be set according to the channel stability requirement. The fewer the interval errors, the more available channels. Figure 2 As shown in the figure, taking the interval error number threshold of 3 as an example, it shows an automatic screening process of available channels in a spectrum. First, the effective peak number m and the peak interval error number n of the spectrum are input, and it is determined whether the peak interval error number n is less than or equal to 3. If so, the optical frequency comb number M of the spectrum is its effective peak number M=m, otherwise, the optical frequency comb number M=0, and then the optical frequency comb number M of the spectrum is output. The above process is completed by the automatic screening of the pre-set computer module according to the stored spectrum information.

[0029] According to one embodiment of the present invention, the number of optical frequency combs of all spectral information and their corresponding voltage and current conditions are plotted into a grid diagram, and the number of optical frequency combs from small to large is represented by colors from light to dark, so as to draw an operating point diagram of a multi-wavelength frequency comb laser. For example, an operating point diagram is drawn with the horizontal axis representing voltage, the vertical axis representing current, and the color depth representing the number of optical frequency combs (the darker the color, the more optical frequency combs there are). The starting current is set to 40mA, the ending current is set to 200mA, and the current interval is 10mA. The starting voltage is set to 0V, the ending voltage is set to 5V, and the voltage interval is 200mV. After obtaining the number of optical frequency combs for each spectral information, the data is summarized, and the result of drawing the operating point diagram is as follows: Figure 3 As shown, it can be seen that the best multi-wavelength laser can be obtained by operating the multi-wavelength frequency comb laser under the conditions of 170mA and 3.4V, so this point can be selected as the operating point of the multi-wavelength frequency comb laser.

[0030] According to one embodiment of the present invention, the present invention also provides a multi-wavelength frequency comb laser operating point screening system capable of implementing the method of the present invention, which is used to screen the optimal operating point of the multi-wavelength frequency comb laser, and the system includes: a current source, which is configured to output current to the multi-wavelength frequency comb laser to be screened according to a preset starting current, current interval, and termination current; a voltage source, which is configured to output voltage to the multi-wavelength frequency comb laser to be screened according to a preset starting voltage, voltage interval, and termination voltage; a spectrometer, which is used to collect output spectrum information of the multi-wavelength frequency comb laser under different current and voltage conditions; a spectrum information storage module, which is used to store the spectrum information collected by the spectrometer in a unified file format; a spectrum information analysis module, which is used to analyze the number of optical frequency combs in each spectrum information stored in the spectrum information storage module and summarize the number of optical frequency combs of all spectrum information to make an operating point diagram, and select the current and voltage corresponding to the point with the largest number of optical frequency combs in the operating point diagram as the operating point. Among them, the spectrum information storage module and the spectrum information analysis module are set on a computer. Since the injection current and reverse bias voltage will affect the spectrum of the output multi-wavelength light source of the multi-wavelength frequency comb laser, the screening of the optimal working conditions needs to consider these two conditions. The current source, voltage source and spectrometer were connected to the computer using a general purpose interface bus (GPIB line), and the three instruments were jointly controlled using LabVIEW.

[0031] Through the scheme of the present invention, the optimal working conditions of the multi-wavelength frequency comb laser can be quickly and accurately screened by directly using the commonly used laboratory equipment, and a frequency comb light source with low power consumption and high output power can be obtained, thereby improving the performance of the laser, including: 1. Improving efficiency, by optimizing the working point search method, efficiently screening the working performance of the laser under various working conditions; 2. Enhancing accuracy, reducing the fluctuation of working performance caused by the instability of the working point, and improving the accuracy of the test results; 3. Simplifying the adjustment process, the method of the present invention uses a large number of computer programs, reduces the technical requirements for operators, and makes the working point screening simpler and more direct, thereby speeding up the test speed. In addition, the scheme of the present invention uses the test instruments commonly used in optical testing laboratories, and tests through computer control, which can save labor costs, material costs, reduce production costs, and improve production efficiency. The operation of each instrument is controlled by a computer, and the spectrum data obtained is automatically processed using the optimized algorithm. Therefore, this method has the advantages of fast screening speed and high accuracy. The scheme of the present invention is not only suitable for the working point screening of multi-wavelength frequency comb lasers, but also applicable to multi-wavelength lasers that can use current and voltage to adjust the output laser.

[0032] It should be noted that although the above describes the various steps in a specific order, it does not mean that the various steps must be executed in the above specific order. In fact, some of these steps can be executed concurrently or even in a different order as long as the required functions can be achieved.

[0033] The present invention may be a system, a method and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the present invention.

[0034] A computer-readable storage medium may be a tangible device that holds and stores instructions used by an instruction execution device. Computer-readable storage media may include, for example, but are not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination thereof. More specific examples (non-exhaustive list) of computer-readable storage media include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a protruding structure in a groove on which instructions are stored, and any suitable combination thereof.

[0035] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A method for screening operating points of a multi-wavelength frequency comb laser, for screening the optimal operating point of a multi-wavelength frequency comb laser, characterized in that: The method comprises: S1. Setting the starting current, current interval, ending current, starting voltage, voltage interval, and ending voltage according to the threshold current performance parameters and usage requirements of the multi-wavelength frequency comb laser to be screened; S2, according to the starting current, current interval, ending current, starting voltage, voltage interval, and ending voltage set in step S1, control the current source and the voltage source to output current and voltage to the multi-wavelength frequency comb laser to be screened multiple times according to the current interval and the voltage interval, and use a spectrometer to collect the output spectrum information of the multi-wavelength frequency comb laser under the current and voltage conditions each time; wherein the current output by the current source each time is a current within the range of the starting current and the ending current, and the voltage input by the voltage source each time is a voltage within the range of the starting voltage and the ending voltage; S3, using a preset spectrum analysis method to automatically analyze the number of optical frequency combs in each spectrum information through a computer and summarizing the number of optical frequency combs in all spectrum information to produce a working point diagram; S4. Select the current and voltage corresponding to the point with the largest number of optical frequency combs in the working point diagram as the working point.

2. The method according to claim 1, characterized in that The starting current was set to 40mA, the current interval was set to 5-10mA, the ending current was set to 500 mA, the starting voltage was set to 0V, the voltage interval was set to 200mV-500mV, and the ending voltage was 5V.

3. The method according to claim 1, characterized in that: The step S2 comprises: S21, adjusting the output of the current source to the starting current, controlling the output of the voltage source to the starting voltage, using a spectrometer to collect output spectrum information of the multi-wavelength frequency comb laser under the starting and starting voltage conditions at this time, and executing S22; S22, controlling the current source to keep the current output starting current unchanged, controlling the voltage source to increase the voltage output by a voltage interval based on the previous voltage, collecting the output spectrum information of the multi-wavelength frequency comb laser under the current current and voltage conditions and executing S23; S23, repeat step S2 until the output voltage of the voltage source reaches the termination voltage and execute step S24; S24, adjusting the output of the current source to increase a current interval based on the previous one, controlling the output of the voltage source to be the starting voltage, using a spectrometer to collect output spectrum information of the multi-wavelength frequency comb laser under the starting and starting voltage conditions at this time, and executing S25; S25, controlling the current source to keep the current output current unchanged, controlling the voltage source to increase the voltage output by a voltage interval based on the previous voltage, and collecting output spectrum information of the multi-wavelength frequency comb laser under the current current and voltage conditions; S26, repeat step S25 until the output voltage of the voltage source reaches the termination voltage and execute S27; S27. Repeat S24 until the output of the current source reaches the termination current.

4. The method according to claim 3, characterized in that All spectral information is stored in a unified file format.

5. The method according to claim 4, characterized in that All spectral information is stored in any storage format.

6. The method according to claim 1, characterized in that In step S3, the number of optical frequency combs in each spectral information is analyzed in the following manner: Obtain the maximum power peak in each spectrum information; Obtain all peaks except the maximum power peak in each spectrum information, and filter out the peaks with power within 3dB below the maximum power as valid peaks and record the number of valid peaks; The interval between every two valid peaks and the number of peak interval errors are recorded, and it is determined whether the number of peak interval errors in each spectrum is less than or equal to the interval error number threshold. The number of optical frequency combs of spectra with peak interval errors less than or equal to the interval number threshold is recorded as the number of corresponding valid peaks, and the number of optical frequency combs of other spectra is recorded as 0, where the peak interval error refers to the peak interval where the distance between two valid peaks does not meet the stability requirements.

7. The method according to claim 6, characterized in that The interval error number threshold is 3.

8. The method according to claim 6, characterized in that In step S3, the number of optical frequency combs of all spectral information and their corresponding voltage and current conditions are plotted into a grid diagram, and the number of optical frequency combs from small to large is represented by colors from light to dark, so as to draw a working point diagram of the multi-wavelength frequency comb laser.

9. A multi-wavelength frequency comb laser operating point screening system based on the method according to any one of claims 1 to 8, used for screening the optimal operating point of the multi-wavelength frequency comb laser, characterized in that: The system comprises: A current source configured to output current to the multi-wavelength frequency comb laser to be screened according to a preset starting current, current interval, and termination current; A voltage source, configured to output a voltage to the multi-wavelength frequency comb laser to be screened according to a preset starting voltage, a voltage interval, and a stopping voltage; A spectrometer, used to collect output spectrum information of a multi-wavelength frequency comb laser under different current and voltage conditions; A spectral information storage module is used to store the spectral information collected by the spectrometer in a unified file format; The spectral information analysis module is used to analyze the number of optical frequency combs in each spectral information stored in the spectral information storage module and summarize the number of optical frequency combs in all spectral information to produce an operating point diagram, and select the current and voltage corresponding to the point with the largest number of optical frequency combs in the operating point diagram as the operating point.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and the computer program can be executed by a processor to implement the steps of the method according to any one of claims 1 to 8.

11. An electronic device or computing device, comprising a memory and a processor, wherein a computer program capable of running on the processor is stored in the memory, characterized in that: When the processor executes the program, the steps of the method according to any one of claims 1 to 8 are implemented.

Images