High repetition frequency laser mode locking identification device and laser

Abstract

The utility model discloses a high repetition frequency laser mode locking recognition device and a laser, and relates to the technical field of laser. In the device, a laser seed source can emit laser pulses to a light receiving element. The light receiving element can convert the laser pulse into an electric signal and send the electric signal to the amplifier. The amplifier amplifies the electric signal to obtain an amplified signal and then sends the amplified signal to the frequency divider. The frequency divider carries out frequency division processing on the amplified signal to obtain a frequency division electric signal, and then the frequency division electric signal can be sent to the microcontroller. The microcontroller can count the frequency division electric signal, determine the frequency of the frequency division electric signal, and send a stop instruction to the laser seed source when determining that the frequency is not in a preset frequency range. The laser seed source can stop emitting the laser pulse in response to a stop instruction. Therefore, according to the device, frequency reduction can be carried out on the femtosecond-level pulse signals in the mode that frequency division is carried out firstly and then counting is carried out, the pulse signals are counted based on the microcontroller, and mode locking recognition is completed.

Description

Technical Field

[0001] This specification relates to the field of laser technology, and in particular to a high repetition rate laser mode locking identification device and a laser. Background Art

[0002] During laser operation, the laser seed source should be able to continuously send laser pulses, and the frequency of the laser pulses should be within a certain frequency range. If the frequency deviation of the laser pulses is too large, the output of the laser seed source should be stopped immediately to prevent damage to the optical components in the laser.

[0003] In the prior art, field programmable gate arrays (FPGAs) are typically used to count laser pulses and thus determine their frequency. However, FPGAs are expensive and have difficulty counting laser pulses with frequencies greater than 100 MHz.

[0004] Obviously, the prior art lacks a device capable of processing high repetition rate laser pulses. Summary of the Invention

[0005] This specification provides a high repetition rate laser mode locking identification device and a laser to partially solve the above-mentioned problems existing in the prior art.

[0006] This manual adopts the following technical solutions:

[0007] This specification provides a high repetition rate laser mode locking identification device, comprising:

[0008] a laser seed source connected to the light receiving element and configured to emit laser pulses to the light receiving element; and to receive a stop instruction and stop emitting the laser pulses;

[0009] The light receiving element is connected to the amplifier and is used to convert the received laser pulse into an electrical signal and send the electrical signal to the amplifier;

[0010] The amplifier is connected to the frequency divider and is used to amplify the received electrical signal to obtain an amplified signal, and send the amplified signal to the frequency divider;

[0011] The frequency divider is connected to the microcontroller and is used to perform frequency division processing on the received amplified signal to obtain a divided frequency electrical signal, and send the divided frequency electrical signal to the microcontroller;

[0012] The microcontroller is connected to the laser seed source and is used to determine the frequency of the frequency-divided electrical signal, and when it is determined that the frequency is not within a preset frequency range, send the stop instruction to the laser seed source.

[0013] Preferably, the frequency of the laser pulse is between 1 MHz and 150 MHz.

[0014] Preferably, the laser seed source and the light receiving element are connected via an optical fiber.

[0015] Preferably, the light receiving element is a photodiode;

[0016] The amplifier is a radio frequency amplifier;

[0017] The microcontroller is a single chip microcomputer.

[0018] Preferably, the voltage of the electrical signal is 10 mV;

[0019] The voltage of the amplified signal is 3.3V.

[0020] Preferably, the frequency divider is used to reduce the frequency of the electrical signal by 256 times.

[0021] Preferably, the frequency division ratio of the frequency divider includes 2, 4, 8, 16, 32, 64, 128, 256, 512, and 1024;

[0022] The frequency divider can adjust the frequency division ratio to 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024 in response to user operation;

[0023] The frequency divider is used to reduce the frequency of the electrical signal by a corresponding multiple based on the frequency division ratio.

[0024] Preferably, the microcontroller is a single chip microcomputer;

[0025] The single chip microcomputer is equipped with a frequency dividing chip, and the frequency dividing chip can perform frequency division processing on the frequency divided electrical signal again before the single chip microcomputer counts the frequency divided electrical signal to determine a secondary frequency divided electrical signal.

[0026] Preferably, the laser seed source is an optical fiber seed source;

[0027] The frequency of the laser pulses emitted by the laser seed source is in the subsecond order.

[0028] On the other hand, this specification provides a laser, which includes the high repetition rate laser mode locking identification device described in any one of the above aspects.

[0029] At least one of the above technical solutions adopted in this specification can achieve the following beneficial effects:

[0030] In this high-repetition-rate laser mode-locked identification device, a laser seed source can emit laser pulses to a light-receiving element. The light-receiving element can receive and convert the laser pulses into electrical signals, and can also send the signals to an amplifier. The amplifier amplifies the received electrical signals to generate an amplified signal, which can then be sent to a frequency divider. The frequency divider can perform frequency division on the received amplified signal to generate a divided electrical signal, and can also send the divided electrical signal to a microcontroller. The microcontroller is configured to count the divided electrical signal to determine its frequency and, if it determines that the frequency is not within a preset frequency range, to send a stop command to the laser seed source. The laser seed source can cease emitting the laser pulses in response to the stop command.

[0031] It can be seen that the device can significantly reduce the frequency of femtosecond pulse signals by first dividing the frequency and then counting, thereby realizing accurate counting of pulse signals based on the microcontroller and completing mode locking identification. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of this specification and constitute a part of this specification. The exemplary embodiments and descriptions of this specification are used to explain this specification and do not constitute an improper limitation of this specification. In the drawings:

[0033] Figure 1 A schematic structural diagram of a high repetition rate laser mode locking identification device provided in one embodiment of this specification;

[0034] Figure 2 This is a schematic structural diagram of a high repetition rate laser mode locking identification device provided in one embodiment of this specification. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of this specification more clear, the technical solutions of this specification will be clearly and completely described below in conjunction with the specific embodiments of this specification and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0036] The technical solutions provided by the embodiments of this specification are described in detail below with reference to the accompanying drawings.

[0037] Figure 1 This is a schematic diagram of the structure of a high repetition rate laser mode locking identification device provided in one embodiment of this specification. Figure 1 As shown, the high repetition rate laser mode-locked identification device includes a laser seed source 1 , a light receiving element 2 , an amplifier 3 , a frequency divider 4 and a microcontroller 5 .

[0038] Preferably, the laser seed source 1 is an optical fiber seed source.

[0039] Preferably, the laser seed source 1 is connected to the light receiving element 2 .

[0040] Preferably, the light receiving element 2 is a photodiode.

[0041] Preferably, the laser seed source 1 and the photodiode are connected via an optical fiber.

[0042] Preferably, the laser seed source 1 is used to emit laser pulses to the light receiving element 2 .

[0043] Preferably, the frequency of the laser pulse is at the femtosecond (fs) level.

[0044] Preferably, the frequency of the laser pulse is between 10 MHz and 500 MHz.

[0045] Preferably, the frequency of the laser pulse is between 1 MHz and 150 MHz.

[0046] Preferably, the laser seed source 1 is communicatively connected to the microcontroller 5 .

[0047] Preferably, the laser seed source 1 is electrically connected to the microcontroller 5 .

[0048] Preferably, the laser seed source 1 is capable of receiving a stop instruction sent by the microcontroller 5 and stops emitting the laser pulse in response to the stop instruction.

[0049] Preferably, the light receiving element 2 is connected to the amplifier 3 .

[0050] Preferably, the light receiving element 2 is electrically connected to the amplifier 3 via a wire.

[0051] Preferably, the light receiving element 2 is configured to receive the laser pulse, convert the laser pulse into an electrical signal, and send the electrical signal to the amplifier 3 .

[0052] Preferably, the amplifier 3 is a radio frequency amplifier 3 .

[0053] Those skilled in the art will appreciate that the development of devices such as the amplifier 3, the light receiving element 2, and the microcontroller 5 is already relatively mature. For example, the microcontroller 5 may be a single-chip microcomputer, a programmable logic gate array, etc., the amplifier 3 may be a radio frequency amplifier, an integrated operational amplifier, etc., and the light receiving element 2 may be a photodiode, an optical receiver, etc.

[0054] Figure 2This is a schematic diagram of the structure of a high repetition rate laser mode locking identification device provided in one embodiment of this specification. Figure 2 As shown, in the device, the frequency divider 4 and the laser seed source 1 are both connected to the single chip microcomputer 6.

[0055] Preferably, the amplifier 3 is capable of receiving the electrical signal sent by the light receiving element 2 .

[0056] Preferably, the amplifier 3 is connected to the frequency divider 4 .

[0057] Preferably, the amplifier 3 is electrically connected to the frequency divider 4 .

[0058] Preferably, the amplifier 3 is used to amplify the electrical signal to obtain an amplified signal.

[0059] Preferably, the amplifier 3 is further configured to send the amplified signal to the frequency divider 4 .

[0060] Preferably, the frequency divider 4 is a radio frequency divider 4 .

[0061] Preferably, the frequency divider 4 is capable of receiving the amplified signal sent by the amplifier 3 .

[0062] Preferably, the frequency divider 4 is used to perform frequency division processing on the amplified signal to obtain a divided frequency electrical signal.

[0063] Preferably, the model of the frequency divider 4 is SYN632A, and the frequency dividing ratio of the frequency divider 4 is 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024. After the frequency divider 4 divides the amplified signal into a divided electrical signal, the frequency of the divided electrical signal is 1 / 2, 1 / 4, 1 / 8, 1 / 16, 1 / 32, 1 / 64, 1 / 128, 1 / 256, 1 / 512 or 1 / 1024 of the amplified signal.

[0064] Preferably, the frequency divider 4 is connected to the microcontroller 5 .

[0065] Preferably, the frequency divider 4 is electrically connected to the microcontroller 5 .

[0066] Preferably, the frequency divider 4 is further configured to send the divided frequency electrical signal to the microcontroller 5 .

[0067] Preferably, the microcontroller 5 is a single chip microcomputer.

[0068] Preferably, the microcontroller 5 is capable of counting the frequency-divided electrical signal.

[0069] Preferably, the microcontroller 5 is a single chip microcomputer, and a frequency dividing chip and a counter are configured in the single chip microcomputer.

[0070] Preferably, the frequency division chip can divide the frequency division electrical signal again before the single chip microcomputer counts the frequency division electrical signal to determine a secondary frequency division electrical signal.

[0071] Preferably, the counter is capable of counting the twice-frequency-divided electrical signal.

[0072] Those skilled in the art will appreciate that the development of microcontrollers 5, such as single-chip microcomputers and field programmable gate arrays (FPGAs), has reached a very mature stage and is capable of counting the frequency-divided electrical signal. Furthermore, the cost of single-chip microcomputers is generally lower than that of FPGAs. Therefore, in a preferred embodiment, the microcontroller 5 is a single-chip microcomputer, which can effectively reduce the cost of the high-repetition-rate laser mode-locked identification device. Furthermore, during the counting process performed by the single-chip microcomputer, the single-chip microcomputer can also perform secondary frequency division of the frequency-divided electrical signal based on its built-in frequency division chip, effectively resolving the problem of inaccurate counting caused by waveform distortion.

[0073] Preferably, the frequency division ratio of the frequency divider 4 is set to 256.

[0074] Preferably, the frequency of the frequency-divided electrical signal is between 0.04 MHz and 2 MHz.

[0075] Preferably, the microcontroller 5 is connected to the laser seed source 1 .

[0076] Preferably, the microcontroller 5 is electrically connected to the laser seed source 1 .

[0077] Preferably, when the microcontroller 5 determines that the frequency of the frequency-divided electrical signal is not within a preset frequency range, it is configured to send the stop instruction to the laser seed source 1 to instruct the laser seed source 1 to stop emitting the laser pulse.

[0078] Preferably, when the microcontroller 5 determines that the frequency of the frequency-divided electrical signal is not within the preset frequency range, it will not send the stop instruction to the laser seed source 1 .

[0079] Preferably, the laser seed source 1 is capable of receiving the stop instruction and, in response to the stop instruction, stops emitting the laser pulse.

[0080] According to the above embodiment, in the high-repetition-rate laser mode-locked identification device, the laser seed source 1 can emit laser pulses to the light receiving element 2. The light receiving element 2 can receive and convert the laser pulses into electrical signals, and can also send the signal to the amplifier 3. The amplifier 3 amplifies the received electrical signal to obtain an amplified signal, and then sends the amplified signal to the frequency divider 4. The frequency divider 4 can perform frequency division processing on the received amplified signal to obtain a divided electrical signal, and can also send the divided electrical signal to the microcontroller 5. The microcontroller 5 is used to count the divided electrical signal to determine the frequency of the divided electrical signal, and is also used to send the stop command to the laser seed source 1 when it determines that the frequency is not within a preset frequency range. The laser seed source 1 can respond to the stop command and stop emitting the laser pulse.

[0081] It can be seen that the device can significantly reduce the frequency of femtosecond pulse signals by first dividing the frequency and then counting, thereby achieving accurate counting of the pulse signal based on the microcontroller 5 and completing mode locking identification.

[0082] Those skilled in the art will understand that counting laser pulses using a frequency division-then-counting method may result in errors. In the high-repetition-rate laser mode-locking identification device provided herein, the microcontroller 5 determines the frequency of the divided electrical signal to determine whether the laser pulse frequency is too high or too low, potentially damaging optical components. Typically, the magnitude of the error in the counting process is much smaller than the magnitude of the laser pulse frequency. Therefore, this error does not affect the accuracy of the high-repetition-rate laser mode-locking identification device.

[0083] Preferably, the frequency of the laser pulses is greater than 10 MHz.

[0084] Preferably, the voltage of the electrical signal is 10 mV.

[0085] Preferably, the voltage of the amplified signal is 3.3V.

[0086] Preferably, the frequency dividing ratio of the frequency divider 4 is 256, which can reduce the frequency of the electrical signal by 256 times.

[0087] Preferably, the frequency division ratio of the frequency divider 4 can be switched among 2, 4, 8, 16, 32, 64, 128, 256, 512, and 1024 in response to user operation.

[0088] It should be noted that all actions of acquiring signals, information or data in this application are carried out in compliance with the relevant data protection laws and policies of the country where they are located and with the authorization given by the owner of the corresponding device.

[0089] In the 1990s, technological improvements could be clearly distinguished as either hardware improvements (for example, improvements to circuit structures like diodes, transistors, and switches) or software improvements (improvements to process flows). However, with the advancement of technology, many process flow improvements today can now be considered direct improvements to hardware circuit structures. Designers almost always create the corresponding hardware circuit structure by programming the improved process flow into the hardware circuit. Therefore, it cannot be said that a process flow improvement cannot be implemented using a hardware module. For example, a programmable logic device (PLD), such as a field programmable gate array (FPGA), is an integrated circuit whose logical function is determined by user programming. Designers can "integrate" a digital system on a PLD through their own programming, without having to hire a chip manufacturer to design and manufacture a dedicated integrated circuit chip. Moreover, nowadays, instead of manually manufacturing integrated circuit chips, this programming is mostly done using "logic compiler" software. This is similar to the software compiler used when developing programs. Before compilation, the original code must also be written in a specific programming language, called a hardware description language (HDL). There is not just one HDL, but many, such as ABEL (Advanced Boolean Expression Language), AHDL (Altera Hardware Description Language), Confluence, CUPL (Cornell University Programming Language), HDCal, JHDL (Java Hardware Description Language), Lava, Lola, MyHDL, PALASM, RHDL (Ruby Hardware Description Language), etc. The most commonly used ones are VHDL (Very-High-Speed Integrated Circuit Hardware Description Language) and Verilog. Those skilled in the art will also understand that by simply programming the method flow in one of these hardware description languages and then programming it into an integrated circuit, a hardware circuit that implements the logic method flow can be easily obtained.

[0090] The controller can be implemented in any suitable manner. For example, the controller can take the form of a microprocessor or processor and a computer-readable medium storing computer-readable program code (e.g., software or firmware) executable by the (micro)processor, logic gates, switches, an application-specific integrated circuit (ASIC), a programmable logic controller, and an embedded microcontroller. Examples of controllers include, but are not limited to, the following microcontrollers: ARC 625D, Atmel AT91SAM, Microchip PIC18F26K20, and Silicone Labs C8051F320. The memory controller can also be implemented as part of the control logic of the memory. Those skilled in the art will also understand that in addition to implementing the controller in pure computer-readable program code, the controller can also be implemented in the form of logic gates, switches, an application-specific integrated circuit, a programmable logic controller, and an embedded microcontroller by logically programming the method steps. Therefore, such a controller can be considered a hardware component, and the devices included therein for implementing various functions can also be considered as structures within the hardware component. Or even, the devices for implementing various functions can be considered as both software modules implementing the method and structures within the hardware component.

[0091] The systems, devices, modules, or units described in the above embodiments may be implemented by computer chips or entities, or by products having certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0092] For the convenience of description, the above devices are described as being divided into various units according to their functions. Of course, when implementing this specification, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0093] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0094] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0095] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0096] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0097] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0098] Memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.

[0099] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0100] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0101] Those skilled in the art will appreciate that the embodiments of this specification may be provided as methods, systems, or computer program products. Thus, this specification may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, this specification may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0102] This specification may be described in the general context of computer-executable instructions, such as program modules, executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, and the like that perform specific tasks or implement specific abstract data types. This specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media, including storage devices.

[0103] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0104] The foregoing is merely an embodiment of the present invention and is not intended to limit the present invention. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the claims of this application.

Claims

1. A high repetition rate laser mode locking identification device, characterized in that: include: a laser seed source connected to the light receiving element and configured to emit laser pulses to the light receiving element; and receiving a stop instruction to stop emitting the laser pulse; The light receiving element is connected to the amplifier and is used to convert the received laser pulse into an electrical signal and send the electrical signal to the amplifier; The amplifier is connected to the frequency divider and is used to amplify the received electrical signal to obtain an amplified signal, and send the amplified signal to the frequency divider; The frequency divider is connected to the microcontroller and is used to perform frequency division processing on the received amplified signal to obtain a divided frequency electrical signal, and send the divided frequency electrical signal to the microcontroller; The microcontroller is connected to the laser seed source and is used to determine the frequency of the frequency-divided electrical signal, and when it is determined that the frequency is not within a preset frequency range, send the stop instruction to the laser seed source.

2. The high repetition rate laser mode locking identification device according to claim 1, characterized in that: The frequency of the laser pulses is between 1 MHz and 150 MHz.

3. The high repetition rate laser mode locking identification device according to claim 1, characterized in that: The laser seed source is connected to the light receiving element via an optical fiber.

4. The high repetition rate laser mode locking identification device according to claim 1, characterized in that: The light receiving element is a photodiode; The amplifier is a radio frequency amplifier; The microcontroller is a single chip microcomputer.

5. The high repetition rate laser mode locking identification device according to claim 1, characterized in that: The voltage of the electrical signal is 10mV; The voltage of the amplified signal is 3.3V.

6. The high repetition rate laser mode locking identification device according to claim 1, characterized in that: The frequency divider is used to reduce the frequency of the electrical signal by 256 times.

7. The high repetition rate laser mode locking identification device according to any one of claims 1 to 5, characterized in that: The frequency division ratio of the frequency divider includes 2, 4, 8, 16, 32, 64, 128, 256, 512, and 1024; The frequency divider can adjust the frequency division ratio to 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024 in response to user operation; The frequency divider is used to reduce the frequency of the electrical signal by a corresponding multiple based on the frequency division ratio.

8. The high repetition rate laser mode locking identification device according to any one of claims 1 to 6, characterized in that: The microcontroller is a single chip microcomputer; The single chip microcomputer is equipped with a frequency dividing chip, and the frequency dividing chip can perform frequency division processing on the frequency divided electrical signal again before the single chip microcomputer counts the frequency divided electrical signal to determine a secondary frequency divided electrical signal.

9. The high repetition rate laser mode locking identification device according to any one of claims 1 to 6, characterized in that: The laser seed source is an optical fiber seed source; The frequency of the laser pulses emitted by the laser seed source is in the subsecond order.

10. A laser, characterized in that: The laser includes the high repetition rate laser mode locking identification device according to any one of claims 1 to 9.

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