Dual-channel laser control system and dual-channel laser

Abstract

The specification discloses a double-channel laser control system and a double-channel laser, and relates to the technical field of laser control. The system comprises a controller, a temperature control assembly and an energy control assembly. The temperature control assembly comprises a pump cabin temperature control module, a first output cabin temperature control module and a second output cabin temperature control module which are independent of each other, and the energy control assembly comprises a first energy control module and a second energy control module. The temperature control modules each comprise a cooling liquid supply, an opening valve, a temperature sensor and a temperature control pipeline. The energy control modules each comprise a rotary table, an energy attenuation element and a grating ruler. The energy attenuation element is fixedly connected to the rotary table. The grating ruler is used for determining the attitude angle of the rotary table. The controller is in communication connection with the opening valve, the temperature sensor, the rotary table and the grating ruler. The controller is used for receiving data and sending instructions to adjust the opening degree of the opening valve and the angle of the rotary table. It can be seen that the temperature of each cabin and the energy of the double-channel laser can be controlled, the long-term normal use of the double-channel laser is ensured, and the stability is improved.

Description

Technical Field

[0001] This specification relates to the field of laser control technology, and in particular to a dual-channel laser control system and a dual-channel laser. Background Technology

[0002] Typically, a dual-path laser refers to a single laser with two independent but structurally symmetrical laser channels. These channels usually share the same pump and control system but output two separate laser beams. They have wide applications in laser ranging, lidar, and materials processing.

[0003] In existing technologies, dual-output lasers typically experience problems such as reduced energy, increased energy difference between the two outputs, and deterioration of optical performance after prolonged operation. Summary of the Invention

[0004] This specification provides a dual-channel laser control system and a dual-channel laser to at least partially solve the aforementioned problems existing in the prior art.

[0005] The following technical solution is adopted in this specification:

[0006] This specification provides a dual-path laser control system. The dual-path laser is provided with a pump chamber, a first laser output chamber, and a second laser output chamber. A pump cavity is provided within the pump chamber. The dual-path laser control system includes a controller, a temperature control component, and an energy control component. The temperature control component includes a pump chamber temperature control module, a first output chamber temperature control module, and a second output chamber temperature control module. The energy control component includes a first energy control module and a second energy control module, respectively disposed within the first laser output chamber and the second laser output chamber.

[0007] The pump chamber temperature control module, the first output chamber temperature control module, and the second output chamber temperature control module are independent of each other and each includes a coolant supply component, an opening valve, a temperature sensor, and a temperature control pipeline; the temperature control pipeline is connected to the coolant supply component, and at least a portion of the temperature control pipeline is located inside the corresponding chamber.

[0008] Both the first energy control module and the second energy control module include a turntable, an energy attenuation element, and a grating ruler; the turntable is used to drive the energy attenuation element located in the optical path of the first laser or the second laser to rotate; the energy attenuation element can attenuate the first laser or the second laser passing through it, and the attenuation ratio is related to the incident angle of the first laser or the second laser; the grating ruler is connected to the turntable and is used to determine the attitude angle of the turntable;

[0009] The controller is communicatively connected to the opening valve, the temperature sensor, the turntable, and the grating ruler, respectively. The controller receives temperature information sent by the temperature sensor and attitude angle information sent by the grating ruler, and sends commands to the opening valve and the turntable to instruct the opening valve to adjust its opening and the turntable to adjust its attitude.

[0010] Preferably, both the first energy control module and the second energy control module include an energy detector;

[0011] The energy detector is disposed in the optical path of the first laser and the second laser, and is used to monitor the power of the first laser and the second laser;

[0012] The controller is communicatively connected to the energy detector and is used to receive power data of the first laser and the second laser. The controller is used to adjust the angle of the turntable based on the power data, thereby adjusting the attenuation rate of the energy attenuation element for the first laser and the second laser, so that the power of the first laser and the second laser are equal.

[0013] Preferably, the temperature of the coolant is lower than the ambient temperature;

[0014] When the controller determines that the temperature information is greater than a preset temperature, it sends a command to the opening valve corresponding to the temperature information, instructing the opening degree of the opening valve to increase.

[0015] Preferably, the energy attenuation element includes a half-wave plate and a polarizer; the half-wave plate is fixedly connected to the turntable, and the half-wave plate and the polarizer are sequentially fixed in the optical paths of the first laser and the second laser;

[0016] Alternatively, the energy attenuation element may include a rotating polarizer;

[0017] Alternatively, the energy attenuation element may include a variable neutral density filter.

[0018] Preferably, the temperature control component includes a pump chamber temperature control module;

[0019] The pump chamber temperature control module includes an opening valve, a coolant supply component, a temperature sensor, and an internal temperature control pipeline.

[0020] Part of the temperature control pipeline is located inside the pump cavity.

[0021] Preferably, a portion of the intracavity temperature control pipeline is located outside the pump cavity and inside the pump chamber;

[0022] The controller is used to determine that after the opening degree of the opening valve of the pump chamber temperature control module has increased by a first percentage, it sends an instruction to instruct the opening degree of the opening valve of the pump chamber temperature control module to decrease by a second percentage; the first percentage is less than the second percentage.

[0023] Preferably, the dual-channel laser control system includes a current closed-loop control component;

[0024] The current closed-loop control component includes a digital-to-analog conversion module, a drive module, and an analog-to-digital conversion module;

[0025] The digital-to-analog converter module is connected to the drive module, and the digital-to-analog converter module is used to output an initial voltage signal to the drive module;

[0026] The driving module is connected to the pump diode in the pump chamber and is used to supply driving current to the pump diode based on the initial voltage signal; and to determine the feedback voltage of the pump diode;

[0027] The analog-to-digital conversion module is connected to the drive module and is used to collect the feedback voltage and convert it into current data;

[0028] The controller is connected to the digital-to-analog converter module and the analog-to-digital converter module via communication, and is used to send instructions to the digital-to-analog converter module to indicate the initial voltage signal and to collect current data.

[0029] Preferably, the dual-path laser control system includes at least two frequency doubling temperature control modules;

[0030] The frequency doubling temperature control module includes a heat sink, an electronic temperature control plate, and a multi-point temperature sensor; the first side of the electronic temperature control plate is in close contact with the frequency doubling crystal of the dual-path laser, and the second side is in close contact with the heat sink; the multi-point temperature sensor is connected to the frequency doubling crystal and is used to monitor the temperature of multiple target points of the frequency doubling crystal; at least one target point is located in the central cavity of the frequency doubling crystal, and at least two target points are located at opposite ends of the frequency doubling crystal;

[0031] The controller is communicatively connected to the multi-point thermometer and the electronic temperature control plate, and is used to send commands to adjust the temperature of the electronic temperature control plate based on the temperature measurement results of the multi-point thermometer.

[0032] On the other hand, this specification provides a dual-path laser, which includes the dual-path laser control system provided in the above-mentioned aspect.

[0033] Preferably, the dual-path laser includes a gating structure, and the controller is equipped with a photoelectric acquisition module;

[0034] The gating structure includes a push-pull structure consisting of two field-effect transistors, which serves as the driver for the Q switch;

[0035] The photoelectric acquisition module includes a timer, which is connected to a Q switch and is used to read the value of the counter at the current moment when the rising edge and falling edge arrive.

[0036] The controller is used to determine and store the pulse width based on the data acquired by the photoelectric acquisition module. At least one of the above-mentioned technical solutions adopted in this specification can achieve the following beneficial effects:

[0037] According to the above, the dual-path laser control system includes a controller, a temperature control component, and an energy control component. The temperature control component includes a pump chamber temperature control module, a first output chamber temperature control module, and a second output chamber temperature control module. The energy control component includes a first energy control module and a second energy control module, respectively located inside the first and second laser output chambers. The pump chamber temperature control module, the first output chamber temperature control module, and the second output chamber temperature control module are independent of each other and each includes a coolant supply, an opening valve, a temperature sensor, and a temperature control pipeline. The temperature control pipeline is connected to the coolant supply, and at least a portion of the temperature control pipeline is located inside its corresponding chamber. Both the first and second energy control modules include a turntable, an energy attenuation element, and a grating ruler. At least a portion of the energy attenuation element is fixedly connected to the turntable, and the energy attenuation element is positioned on the optical paths of the first and second lasers. The grating ruler is connected to the turntable and is used to determine the attitude angle of the turntable. The controller is communicatively connected to the opening valve, the temperature sensor, the turntable, and the grating ruler. The controller receives temperature information from the temperature sensor and attitude angle information from the grating ruler, and sends commands to the opening valve and the turntable to instruct the opening valve to adjust its opening and the turntable to adjust its attitude.

[0038] It is evident that this system can control the temperature of each compartment and the energy of the dual lasers, ensuring the long-term normal operation of the dual lasers and improving stability. Attached Figure Description

[0039] The accompanying drawings, which are included to provide a further understanding of this specification and form part of this specification, illustrate exemplary embodiments and are used to explain this specification, but do not constitute an undue limitation thereof. In the drawings:

[0040] Figure 1 A schematic diagram of the architecture of a dual-path laser control system provided for one embodiment of this specification;

[0041] Figure 2 A partial structural schematic diagram of a dual-channel laser control system provided for one embodiment of this specification;

[0042] Figure 3 A partial structural schematic diagram of a dual-channel laser temperature control system provided for one embodiment of this specification;

[0043] Figure 4 A schematic diagram of the architecture of a dual-channel laser temperature control system provided for one embodiment of this specification;

[0044] Figure 5 A schematic diagram of a dual-path laser provided for one embodiment of this specification;

[0045] Figure 6 This is a partial control flow diagram provided for one embodiment of this specification.

[0046] Explanation of reference numerals in the attached figures:

[0047] 11. Opening valve; 12. Temperature sensor; 13. First laser output chamber; 14. Second laser output chamber; 15. Pump chamber; 16. Water temperature sensor; 121. Front target point; 122. Central target point; 123. Rear target point; 17. Reflector; 18. 50% beam splitter; 19. Polarizer; 20. Half-wave plate; 21. Turntable; 22. Sampling mirror; 23. Energy meter; 24. Pump cavity. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this specification clearer, the technical solutions of this specification will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this specification without creative effort are within the scope of protection of this application.

[0049] In the description of this invention, it should be noted that the term "or" is generally used to include the meaning of "and / or" unless otherwise expressly stated in the content.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0051] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0052] Figure 1 A schematic diagram of the architecture of a dual-channel laser control system provided for one embodiment of this specification is shown below. Figure 1 As shown, the dual-path laser is equipped with a pump chamber, a first laser output chamber, and a second laser output chamber, with a pump cavity located within the pump chamber. The dual-path laser control system includes a controller, a temperature control component, and an energy control component.

[0053] Preferably, the temperature control component includes a pump chamber temperature control module, a first output chamber temperature control module, and a second output chamber temperature control module.

[0054] Preferably, the energy control component includes a first energy control module and a second energy control module respectively disposed inside the first laser output chamber and the second laser output chamber.

[0055] Preferably, the first energy control module is located inside the first laser output chamber.

[0056] Preferably, the second energy control module is located inside the second laser output chamber.

[0057] Preferably, the pump chamber temperature control module, the first output chamber temperature control module, and the second output chamber temperature control module are independent of each other and do not interfere with each other.

[0058] Preferably, the pump chamber temperature control module, the first output chamber temperature control module, and the second output chamber temperature control module all include a coolant supply component, an opening valve, a temperature sensor, and a temperature control pipeline.

[0059] Preferably, the temperature control pipeline is connected to the coolant supply unit, and at least a portion of the structure of the temperature control pipeline is located inside the corresponding compartment.

[0060] Preferably, the pump chamber temperature control module, the first output chamber temperature control module, and the second output chamber temperature control module are provided with connection holes and sealing components. The connection holes can be passed through by the temperature control pipeline, and the sealing components are used to seal the connection holes through which the temperature control pipeline passes. The relevant technology has been developed to a relatively mature level, and will not be described in detail here.

[0061] Preferably, the technology related to this coolant supply component is already quite mature, and this specification does not impose any restrictions on it.

[0062] Figure 2 A partial structural schematic diagram of a dual-channel laser control system provided as an embodiment of this specification is shown below. Figure 2 As shown, three opening valves 11 are set independently, three temperature sensors 12 are respectively set inside the first laser output chamber 13, the second laser output chamber 14 and the pump chamber 15, and the temperature control pipeline is also equipped with three water temperature sensors 16.

[0063] Preferably, both the first energy control module and the second energy control module include a turntable, an energy attenuation element, and a grating ruler.

[0064] Preferably, at least a portion of the structure of the energy attenuation element is fixedly connected to the turntable.

[0065] Preferably, the energy attenuation element includes a half-wave plate and a polarizer. More preferably, the half-wave plate is fixedly connected to the turntable, and the half-wave plate and the polarizer are sequentially fixed in the optical paths of the first laser and the second laser.

[0066] Preferably, the energy attenuation element includes a rotating polarizer, which is fixedly connected to the turntable.

[0067] Preferably, the energy attenuation element includes a variable neutral density filter, which is fixedly connected to the turntable.

[0068] Preferably, the energy attenuation element is configured in the optical path of the first laser and the second laser.

[0069] More preferably, the grating ruler is connected to the turntable and is used to determine the attitude angle of the turntable.

[0070] Preferably, the turntable is used to drive an energy attenuation element located in the optical path of the first laser or the second laser to rotate. The energy attenuation element attenuates the first or second laser light passing through it, and the attenuation ratio is related to the incident angle of the first or second laser light.

[0071] Preferably, the controller is communicatively connected to the opening valve, the temperature sensor, the turntable, and the grating ruler, respectively.

[0072] Preferably, the controller is used to receive temperature information sent by the temperature sensor and attitude angle information sent by the grating ruler, and is also used to send commands to the opening valve and the turntable, instructing the opening valve to adjust the opening and instructing the turntable to adjust the attitude.

[0073] According to the above, the dual-path laser control system includes a controller, a temperature control component, and an energy control component. The temperature control component includes a pump chamber temperature control module, a first output chamber temperature control module, and a second output chamber temperature control module. The energy control component includes a first energy control module and a second energy control module, respectively located inside the first and second laser output chambers. The pump chamber temperature control module, the first output chamber temperature control module, and the second output chamber temperature control module are independent of each other and each includes a coolant supply, an opening valve, a temperature sensor, and a temperature control pipeline. The temperature control pipeline is connected to the coolant supply, and at least a portion of the temperature control pipeline is located inside its corresponding chamber. Both the first and second energy control modules include a turntable, an energy attenuation element, and a grating ruler. At least a portion of the energy attenuation element is fixedly connected to the turntable, and the energy attenuation element is positioned on the optical paths of the first and second lasers. The grating ruler is connected to the turntable and is used to determine the attitude angle of the turntable. The controller is communicatively connected to the opening valve, the temperature sensor, the turntable, and the grating ruler. The controller receives temperature information from the temperature sensor and attitude angle information from the grating ruler, and sends commands to the opening valve and the turntable to instruct the opening valve to adjust its opening and the turntable to adjust its attitude.

[0074] It is evident that this system can control the temperature of each compartment and the energy of the dual lasers, ensuring the long-term normal operation of the dual lasers and improving stability.

[0075] Preferably, both the first energy control module and the second energy control module include an energy detector.

[0076] Preferably, the energy detector is disposed in the optical path of the first laser and the second laser to monitor the power of the first laser and the second laser.

[0077] Preferably, the controller is communicatively connected to the energy detector to receive power data of the first laser and the second laser.

[0078] Preferably, the rotation angle accuracy of the turntable is 0.001 degrees. The relevant technology is relatively mature, and this specification does not impose any restrictions on it.

[0079] More preferably, based on a turntable with an accuracy of 0.001 degrees, the power adjustment accuracy of the first laser and the second laser is less than 0.1%.

[0080] More preferably, based on a turntable with an accuracy of 0.001 degrees, the power adjustment accuracy of the first laser and the second laser is 0.00175%.

[0081] More preferably, the accuracy is expressed as a percentage, and the percentage describes the total power of the first or second laser at the current moment.

[0082] Further preferably, the turntable is capable of rotating 360 degrees.

[0083] Preferably, the controller is used to adjust the angle of the turntable based on the power data, thereby adjusting the attenuation rate of the energy attenuation element on the first laser and the second laser, so that the power of the first laser and the second laser are equal.

[0084] Preferably, the controller is an Advanced Reduced Instruction Set Machine (ARM) microcontroller.

[0085] More preferably, the controller can adjust the pose of the turntable corresponding to the two lasers through a pre-stored proportional-integral-derivative (PID) control algorithm to ensure that the power of the first laser and the second laser are exactly the same.

[0086] Preferably, the opening accuracy of the valve is 1% of the degree.

[0087] Preferably, the temperature of the coolant is lower than the ambient temperature. The ambient temperature refers to the temperature inside the pump chamber, the first laser output chamber, and the second laser output chamber.

[0088] More preferably, when the controller determines that the temperature information is greater than a preset temperature, it sends a command to the opening valve corresponding to the temperature information, instructing the opening degree of the opening valve to increase by at least 1%.

[0089] Preferably, the preset temperatures of the pump chamber, the first laser output chamber, and the second laser output chamber are different.

[0090] Preferably, the preset temperatures of the pump chamber, the first laser output chamber, and the second laser output chamber are all the same.

[0091] Even minute temperature changes in a laser pump diode can significantly alter its output wavelength and power. If the pump diode's wavelength drifts outside the absorption peak of the gain medium, pump efficiency decreases, leading to unstable output energy. Therefore, temperature control is crucial for pump diodes. This is one of the most common and challenging problems in solid-state lasers. During pumping, the gain medium heats up, causing a change in its refractive index and creating a lens-like effect (thermal lens). The focal length of the thermal lens dynamically changes with pump power, cooling efficiency, and ambient temperature, altering mode matching and losses within the laser cavity, ultimately resulting in output energy fluctuations. Fluctuations in cooling water temperature, flow rate, and quality directly affect the temperature of the gain medium and pump source. A 0.5°C change in water temperature can cause a significant output energy drift. High-performance lasers require highly precise temperature-controlled cooling systems.

[0092] Based on this, in one or more preferred embodiments of this specification, the temperature control component includes a pump chamber temperature control module.

[0093] Preferably, the pump chamber temperature control module includes an opening valve, a coolant supply component, a temperature sensor, and an internal temperature control pipeline.

[0094] In a further preferred embodiment, part of the temperature control pipeline is located inside the pump chamber.

[0095] More preferably, the accuracy of the opening valve is 1%, that is, the opening degree of the opening valve can be adjusted to a minimum value of 1% within the range of 0-100%.

[0096] Preferably, the controller can determine the opening degree of the valve at the current moment and adjust the supply voltage of the valve, thereby adjusting the opening degree of the valve.

[0097] More preferably, the controller can acquire laser data to determine whether the pump cavity is in a thermally stable phase.

[0098] Preferably, in the default state, during the thermal stabilization phase, the controller can send a command to adjust the opening degree of the valve, and determine that the opening degree of the valve is 50%.

[0099] More preferably, the controller can acquire information about the pump light output from the pump cavity.

[0100] Preferably, the controller can control the temperature inside the pump chamber when the energy fluctuation of the pump chamber output is determined to be within 3%.

[0101] Preferably, the temperature sensors installed in the pump cavity, pump chamber, first laser output chamber, and second laser output chamber are all capable of collecting temperature data from multiple target points. For example, the temperature sensor in the pump cavity can collect temperature data from three target points. One target point is the center of the pump cavity, and the other two target points are located at opposite ends of the pump cavity. These two ends are located at opposite ends in the laser extension direction. More preferably, the controller can determine the temperature measurement result based on the data from the three target points. This temperature measurement structure can be the average, median, maximum, minimum, or weighted sum of the data from the three target points. For example, the weight of the data from the central target point is preset to 0.6, and the weights of the other two are 0.2 respectively. The weighted sum of the temperature measurement results from the three target points is then determined as the temperature measurement result of the pump cavity.

[0102] Preferably, the controller can adjust the opening of the valve according to the temperature measurement result and the preset cavity temperature value, so that the temperature measurement result is equal to the cavity temperature value.

[0103] Preferably, the temperature inside the cavity is 22 degrees Celsius.

[0104] Figure 3 A partial structural schematic diagram of a dual-channel laser temperature control system provided as an embodiment of this specification is shown below. Figure 3 As shown, three target points are set in the pump chamber 24 for temperature detection: front target point 121, central target point 122, and rear target point 123.

[0105] Preferably, a portion of the temperature control pipeline within the cavity is located outside the pump cavity but inside the pump chamber. More preferably, the controller, after determining that the opening degree of the valve of the pump cavity temperature control module has cumulatively increased by a first percentage, sends a command to instruct the opening degree of the valve of the pump chamber temperature control module to decrease by a second percentage; the first percentage is less than the second percentage.

[0106] Using the above method, the controller can actively adjust the opening of the control valve in the pump chamber to balance the influence of the temperature control pipeline corresponding to the pump chamber on the temperature inside the pump chamber.

[0107] Preferably, the dual-path laser control system includes a current closed-loop control component.

[0108] Preferably, the current closed-loop control component includes a digital-to-analog converter module, a drive module, and an analog-to-digital converter module.

[0109] Preferably, the digital-to-analog converter module is connected to the drive module, and the digital-to-analog converter module is used to output an initial voltage signal to the drive module.

[0110] Preferably, the drive module is connected to the pump diode in the pump chamber, and is used to supply drive current to the pump diode based on the initial voltage signal; and to determine the feedback voltage of the pump diode.

[0111] Preferably, the analog-to-digital converter module is connected to the drive module to acquire the feedback voltage and convert it into current data.

[0112] Preferably, the controller is connected to the digital-to-analog converter module and the analog-to-digital converter module via communication, and is used to send instructions to the digital-to-analog converter module to indicate the initial voltage signal and to collect current data.

[0113] Preferably, both the digital-to-analog converter module and the analog-to-digital converter module are 16-bit high-precision devices.

[0114] Preferably, the dual-path laser control system includes at least two frequency doubling temperature control modules.

[0115] Preferably, the frequency doubling temperature control module includes a heat sink, an electronic temperature control plate, and a multi-point temperature sensor.

[0116] Preferably, the first side of the electronic temperature control plate is in close contact with the frequency doubling crystal of the dual-path laser, and the second side is in close contact with the heat sink.

[0117] Preferably, the multi-point thermometer is connected to the frequency doubling crystal to monitor the temperature of multiple target points of the frequency doubling crystal.

[0118] Preferably, at least one target point is located in the central cavity of the frequency doubling crystal, and at least two target points are located at the two ends of the frequency doubling crystal respectively.

[0119] Preferably, the controller is communicatively connected to the multi-point thermometer and the electronic temperature control element, and is used to send commands to adjust the temperature of the electronic temperature control element based on the temperature measurement results of the multi-point thermometer.

[0120] Preferably, the controller can determine the temperature measurement result of the multi-point thermometer based on the temperature of multiple target points. For details, please refer to the process of the controller determining the temperature measurement result.

[0121] Figure 4 A schematic diagram of the architecture of a dual-channel laser temperature control system provided in one embodiment of this specification is shown below. Figure 4 As shown, the temperature control component, energy control component, current closed-loop control component, and frequency multiplier temperature control module are all communicatively connected to the controller. The temperature control component includes a pump chamber temperature control module, a first output chamber temperature control module, and a second output chamber temperature control module. The energy control component includes a first energy control module and a second energy control module. The current closed-loop control component includes a digital-to-analog converter module, an analog-to-digital converter module, and a drive module.

[0122] The above describes a dual-channel laser control system provided by one or more embodiments of this specification. Based on the same idea, this specification also provides a corresponding dual-channel laser.

[0123] Figure 5 A schematic diagram of a dual-path laser provided as an embodiment of this specification is shown below. Figure 5 As shown, in this laser, the laser beam passes through polarizer 19 and is then split into a first laser and a second laser by a 50% beam splitter 18. The first laser's optical path direction is changed by a reflector 17. The first and second lasers pass through a half-wave plate 20, polarizer 19, and sampling mirror 22, respectively. The sampled laser beam illuminates the energy meter 23, while the remaining laser beams are emitted. A turntable 21 is connected to the half-wave plate 20.

[0124] Preferably, the dual-path laser includes the dual-path laser control system provided in any of the above embodiments.

[0125] Further preferably, the dual-path laser includes a gating structure, and the controller is equipped with a photoelectric acquisition module. The gating structure includes a push-pull configuration consisting of two field-effect transistors (FETs) serving as drivers for a Q-switch. The photoelectric acquisition module includes a timer connected to the Q-switch, used to read the current counter values ​​(C1 and C2) at the rising and falling edges of the pulse. The controller determines and stores the pulse width based on the data acquired by the photoelectric acquisition module. The controller also compares the pulse width with a preset output pulse width for closed-loop control.

[0126] Using the above method, the precise moment of edge occurrence can be automatically recorded by hardware, eliminating software delay and accurately capturing the laser output pulse width. The final output pulse width is: Where C is the output pulse width and TC is the timer clock frequency. This achieves closed-loop feedback and strictly controls the output pulse width of the Q switch.

[0127] Figure 6 A partial control flow diagram is provided for one embodiment of this specification, such as... Figure 6As shown, the photoelectric acquisition module is equipped with a photoelectric detector head, which can convert optical signals into electrical signals. The process is as follows: At time A, a pulse signal is output, resulting in laser output. The photoelectric detector detects the optical signal of the laser pulse and converts it into an electrical signal, outputting the rising edge of the pulse width signal to the controller. The timer in the controller records the current time C1. At time B, the pulse width signal output stops, and light output stops. The photoelectric detector cannot detect the optical signal of the laser pulse, confirming that there is no light signal received, and outputs the falling edge of the pulse width signal to the controller. The timer in the controller records the current time C2. The difference N between C1 and C2 is determined. The controller determines the pulse width as N divided by the clock frequency of the timer to determine the actual pulse width, and compares this actual pulse width with the output pulse width, strictly controlling the pulse width to be output according to the set value.

[0128] It should be noted that all actions involving the acquisition of signals, information, or data in this application are carried out in compliance with the relevant data protection laws and policies of the country where the application is located, and with the authorization granted by the owner of the relevant device.

[0129] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0130] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0131] The above description is merely an embodiment of this specification and is not intended to limit this specification. Various modifications and variations can be made to this specification by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of the claims of this application.

Claims

1. A dual-channel laser control system, characterized in that, The dual-path laser is provided with a pump chamber, a first laser output chamber, and a second laser output chamber, and a pump cavity is provided inside the pump chamber; the dual-path laser control system includes a controller, a temperature control component, and an energy control component; the temperature control component includes a pump chamber temperature control module, a first output chamber temperature control module, and a second output chamber temperature control module; the energy control component includes a first energy control module and a second energy control module respectively disposed inside the first laser output chamber and the second laser output chamber. The pump chamber temperature control module, the first output chamber temperature control module, and the second output chamber temperature control module are independent of each other and each includes a coolant supply component, an opening valve, a temperature sensor, and a temperature control pipeline; the temperature control pipeline is connected to the coolant supply component, and at least a portion of the temperature control pipeline is located inside the corresponding chamber. Both the first energy control module and the second energy control module include a turntable, an energy attenuation element, and a grating ruler; the turntable is used to drive the energy attenuation element located in the optical path of the first laser or the second laser to rotate; the energy attenuation element can attenuate the first laser or the second laser passing through it, and the attenuation ratio is related to the incident angle of the first laser or the second laser; the grating ruler is connected to the turntable and is used to determine the attitude angle of the turntable; The controller is communicatively connected to the opening valve, the temperature sensor, the turntable, and the grating ruler, respectively. The controller is used to receive temperature information sent by the temperature sensor and attitude angle information sent by the grating ruler, and is also used to send commands to the opening valve and the turntable, instructing the opening valve to adjust its opening and instructing the turntable to adjust its attitude. The dual-path laser control system includes at least two frequency doubling temperature control modules; each frequency doubling temperature control module includes a heat sink, an electronic temperature control plate, and a multi-point temperature sensor; the controller is communicatively connected to the multi-point temperature sensor and the electronic temperature control plate, and is used to send commands to adjust the temperature of the electronic temperature control plate based on the temperature measurement results of the multi-point temperature sensor.

2. The dual-channel laser control system according to claim 1, characterized in that, Both the first energy control module and the second energy control module include an energy detector; The energy detector is disposed in the optical path of the first laser and the second laser, and is used to monitor the power of the first laser and the second laser; The controller is communicatively connected to the energy detector and is used to receive power data of the first laser and the second laser. The controller is used to adjust the angle of the turntable based on the power data, thereby adjusting the attenuation rate of the energy attenuation element for the first laser and the second laser, so that the power of the first laser and the second laser are equal.

3. The dual-channel laser control system according to claim 1, characterized in that, The temperature of the coolant is lower than the ambient temperature; When the controller determines that the temperature information is greater than a preset temperature, it sends a command to the opening valve corresponding to the temperature information, instructing the opening degree of the opening valve to increase.

4. The dual-channel laser control system according to claim 1, characterized in that, The energy attenuation element includes a half-wave plate and a polarizer; the half-wave plate is fixedly connected to the turntable, and the half-wave plate and the polarizer are sequentially fixed in the optical paths of the first laser and the second laser; Alternatively, the energy attenuation element may include a rotating polarizer; Alternatively, the energy attenuation element may include a variable neutral density filter.

5. The dual-channel laser control system according to claim 1, characterized in that, The temperature control component includes a pump chamber temperature control module; The pump chamber temperature control module includes an opening valve, a coolant supply component, a temperature sensor, and an internal temperature control pipeline. Part of the temperature control pipeline is located inside the pump cavity.

6. The dual-channel laser control system according to claim 5, characterized in that, Part of the temperature control pipeline is located outside the pump cavity and inside the pump chamber; The controller is used to determine that after the opening degree of the opening valve of the pump chamber temperature control module has increased by a first percentage, it sends an instruction to instruct the opening degree of the opening valve of the pump chamber temperature control module to decrease by a second percentage; the first percentage is less than the second percentage.

7. The dual-channel laser control system according to any one of claims 1-6, characterized in that, The dual-path laser control system includes a current closed-loop control component; The current closed-loop control component includes a digital-to-analog conversion module, a drive module, and an analog-to-digital conversion module; The digital-to-analog converter module is connected to the drive module, and the digital-to-analog converter module is used to output an initial voltage signal to the drive module; The driving module is connected to the pump diode in the pump chamber and is used to supply driving current to the pump diode based on the initial voltage signal; and to determine the feedback voltage of the pump diode; The analog-to-digital conversion module is connected to the drive module and is used to collect the feedback voltage and convert it into current data; The controller is connected to the digital-to-analog converter module and the analog-to-digital converter module via communication, and is used to send instructions to the digital-to-analog converter module to indicate the initial voltage signal and to collect current data.

8. The dual-channel laser control system according to any one of claims 1-6, characterized in that, The first side of the electronic temperature control plate is in close contact with the frequency doubling crystal of the dual-path laser, and the second side is in close contact with the heat sink; the multi-point temperature sensor is connected to the frequency doubling crystal and is used to monitor the temperature of multiple target points of the frequency doubling crystal; at least one target point is located in the central cavity of the frequency doubling crystal, and at least two target points are located at the two ends of the frequency doubling crystal respectively.

9. A dual-path laser, characterized in that, The dual-path laser includes the dual-path laser control system as described in any one of claims 1-8.

10. The dual-path laser according to claim 9, characterized in that, The dual-path laser includes a gating structure, and the controller is equipped with a photoelectric acquisition module. The gating structure includes a push-pull structure consisting of two field-effect transistors, which serves as the driver for the Q switch; The photoelectric acquisition module includes a timer, which is connected to a Q switch and is used to read the value of the counter at the current moment when the rising edge and falling edge arrive. The controller is used to determine the pulse width based on the data acquired by the photoelectric acquisition module, and then store it.

Images