Pulse laser drive circuit, laser device and laser device control method

Abstract

The invention relates to a pulse laser driving circuit, laser equipment and a laser equipment control method. The pulse laser driving circuit comprises a control module, a laser transmitting module, a driving module and a laser monitoring module, the driving module sends a driving signal to the laser emission module; the control module sends a pulse trigger signal to the laser emission module, so that the laser emission module emits laser according to the pulse trigger signal and the driving signal; the laser monitoring module monitors a pulse current signal of the laser emission module and sends the pulse current signal to the control module; the control module determines whether the pulse current signal is effective according to the pulse trigger signal; and under the condition that the pulse current signal is determined to be effective, determining the real-time state of the pulse laser driving circuit according to the pulse current signal. According to the pulse laser driving circuit, laser can be stably emitted, laser scanning and laser ranging can be achieved, pulse current signals can be collected in real time, circuit self-inspection is completed, and the operation stability of the driving circuit is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of laser control technology, and in particular to a pulse laser driving circuit, laser equipment and a laser equipment control method. Background Art

[0002] In laser radar, laser scanning and laser ranging, it is often necessary to detect the target distance and spatial position information by emitting repetition rate pulsed laser and receiving pulsed laser echo signals. For high repetition rate pulsed laser applications, the laser driving circuit is required to generate high-speed pulsed current to generate high peak optical power and narrow pulse width pulsed laser.

[0003] The performance and reliability of the laser drive circuit will directly affect the quality of the pulsed laser and the confidence of the test results. In the nanosecond pulse laser pulse drive circuit, all open-loop drive circuit structures are used, which often brings certain safety hazards and operational reliability issues. For example, FPGA control logic failure or power device failure may cause the laser light source to malfunction, or the instantaneous output optical power may exceed the safety range for human eyes. Summary of the invention

[0004] In order to solve the above technical problems, the embodiments of the present application provide a pulse laser driving circuit, a laser device and a laser device control method that can accurately control the pulse laser to emit laser light and effectively monitor the real-time state of the laser driving circuit. The specific scheme is as follows: In a first aspect, an embodiment of the present application provides a pulse laser driving circuit, including: a control module, a laser emission module, a driving module and a laser monitoring module; The driving module is connected to the laser emitting module, and the driving module provides a driving signal for the laser emitting module; the control module is connected to the laser emitting module, and the control module sends a pulse trigger signal to the laser emitting module, so that the laser emitting module emits laser according to the pulse trigger signal and the driving signal; one end of the laser monitoring module is connected to the laser emitting module, and the other end of the laser monitoring module is connected to the control module, and the laser monitoring module monitors the pulse current signal of the laser emitting module and sends the pulse current signal to the control module; The control module determines whether the pulse current signal is valid according to the pulse trigger signal; if it is determined that the pulse current signal is valid, the control module determines the real-time state of the pulse laser driving circuit according to the pulse current signal.

[0005] According to a specific implementation of the embodiment of the present application, the laser emission module includes at least one group of laser diodes and pulse power tubes; the driving module includes multiple driving power supplies and a driving signal adjustment unit; The driving power supply is connected to the anode of the laser diode through the driving signal adjustment unit, the cathode of the laser diode is connected to the first end of the pulse power tube, the second end of the pulse power tube is grounded, and the control end of the pulse power tube is connected to the control module.

[0006] According to a specific implementation of the embodiment of the present application, the driving power supply is a high voltage power supply; the driving signal adjustment unit includes a first current limiting resistor and an energy storage capacitor; The high voltage power supply is connected to the anode of the laser diode through the first current limiting resistor; The energy storage capacitor is connected in parallel between the current limiting resistor and the laser diode.

[0007] According to a specific implementation of the embodiment of the present application, the control module includes a controller and a plurality of pulse trigger signal adjustment units, wherein the pulse trigger signal adjustment unit includes a narrow pulse generator and a driver; One end of the narrow pulse generator is connected to the controller, the other end of the narrow pulse generator is connected to one end of the driver, and the other end of the driver is connected to the control end of the pulse power tube.

[0008] According to a specific implementation of the embodiment of the present application, the laser monitoring module includes at least one pulse current detection unit, and the pulse current detection unit includes a second current limiting resistor and a voltage stabilizing diode; One end of the second current limiting resistor is connected to the cathode of the laser diode, and the other end of the second current limiting resistor is connected to the control module; The cathode of the voltage stabilizing diode is connected in parallel between the second current limiting resistor and the control module; The anode of the Zener diode is grounded.

[0009] According to a specific implementation of the embodiment of the present application, the control module further includes a shift register, and the shift register includes a plurality of data input terminals; The laser monitoring module includes a plurality of pulse current detection units, one end of each pulse current detection unit is connected to the cathode of the laser diode, the other end of each pulse current detection unit is connected to the data input end of the shift register, and the data output end of the shift register is connected to the controller.

[0010] According to a specific implementation of the embodiment of the present application, the control module performs synchronous detection according to the pulse trigger signal and the pulse current signal; In the case where the pulse trigger signal and the pulse current signal are synchronized, determining that the pulse current signal is valid; In the case where the pulse trigger signal and the pulse current signal are not synchronized, it is determined that the pulse current signal is invalid.

[0011] According to a specific implementation of the embodiment of the present application, the control module determines the real-time state of the laser emission module corresponding to the pulse current detection unit according to the pulse current signal sent back by the pulse current detection unit.

[0012] In a second aspect, an embodiment of the present application provides a laser device, comprising the pulse laser driving circuit described in the first aspect.

[0013] In a third aspect, an embodiment of the present application provides a laser device control method, which is applied to the laser device described in the second aspect, and the method includes: Obtaining a pulse trigger signal and a pulse current signal; Determining whether the pulse current signal is valid according to the pulse trigger signal; When it is determined that the pulse current signal is valid, the real-time state of the pulse laser driving circuit is determined according to the pulse current signal.

[0014] In summary, the present embodiment provides a pulse laser driving circuit, laser equipment and laser equipment control method, including: a control module, a laser emission module, a driving module and a laser monitoring module; the driving module sends a driving signal to the laser emission module; the control module sends a pulse trigger signal to the laser emission module, so that the laser emission module emits a laser according to the pulse trigger signal and the driving signal; the laser monitoring module monitors the pulse current signal of the laser emission module and sends the pulse current signal to the control module; the control module determines whether the pulse current signal is valid according to the pulse trigger signal; when it is determined that the pulse current signal is valid, the real-time state of the pulse laser driving circuit is determined according to the pulse current signal. The pulse laser driving circuit provided in the present application can not only stably emit lasers, realize laser scanning and laser ranging, but also can collect pulse current signals in real time, complete circuit self-test, and greatly improve the operation stability of the driving circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A structural block diagram of a pulse laser driving circuit provided in an embodiment of the present application; Figure 2A schematic diagram of the waveforms of a pulse trigger signal and a pulse current monitoring signal of a pulse laser driving circuit provided in an embodiment of the present application; Figure 3 A circuit diagram of a pulse laser driving circuit provided in an embodiment of the present application; Figure 4 A circuit diagram of another pulse laser driving circuit provided in an embodiment of the present application; Figure 5 A circuit diagram of another pulse laser driving circuit provided in an embodiment of the present application; Figure 6 A flow chart of a laser device control method is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0017] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0019] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0020] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0021] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0022] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0023] In the related art, the driving circuit of the pulse laser is usually a high-voltage narrow pulse circuit, the voltage is usually between 20~40V, the general pulse width is between 1~5ns, and the rising edge is less than 1ns. Therefore, the realization of monitoring and closed-loop control requires a high-speed hardware circuit that can provide high voltage and high bandwidth conditions, which has high requirements for hardware circuit design and will significantly increase the difficulty of design verification technology and manufacturing costs. Secondly, the setting of the pulse current monitoring circuit in the related art will introduce additional parasitic capacitance or stray inductance, which will have an adverse effect on the rising or falling edge of the pulse current, reduce the peak power of the pulse laser, and reduce the detection signal-to-noise ratio and detection range.

[0024] This embodiment provides a pulse laser driving circuit, which realizes high-precision control of the pulse laser through low-cost circuit element design, and can maintain real-time current signal monitoring of the pulse laser while controlling the pulse laser to emit laser, without introducing parasitic capacitance or stray inductance, thereby ensuring the peak power of the pulse laser, and thus maintaining the detection signal-to-noise ratio and detection range of the laser radar.

[0025] like Figure 1 As shown, a pulse laser driving circuit is provided, including: a control module 110, a laser emitting module 120, a driving module 130 and a laser monitoring module 140. The driving module 130 is connected to the laser emitting module 120, the control module 110 is respectively connected to the laser emitting module 120 and the laser monitoring module 140, and the laser detection module is connected to the laser emitting module 120.

[0026] In this embodiment, the driving module 130 sends a driving signal to the laser emitting module 120, wherein the driving signal includes a driving voltage and a driving current. Specifically, in this embodiment, the terminal driving module 130 can provide a pulse driving signal, and the pulse driving signal is used to provide the laser emitting module 120 with a driving voltage and a driving current according to the time interval of the trigger signal of the pulsed laser.

[0027] In this embodiment, the control module 110 sends a pulse trigger signal to the laser emitting module 120, so that the laser emitting module 120 emits laser according to the pulse trigger signal and the driving signal. The sending frequency and signal type of the pulse trigger signal can be configured according to the needs of the actual application scenario. For different types of pulse lasers, the sending frequency and signal type of the pulse trigger signal can be adaptively configured.

[0028] In this embodiment, one end of the laser monitoring module 140 is connected to the laser emitting module 120, and the other end of the laser monitoring module 140 is connected to the control module 110. The laser monitoring module 140 monitors the pulse current signal of the laser emitting module 120 and sends the pulse current signal to the control module 110. In this embodiment, the pulse current signal in the laser emitting module 120 is collected in real time by the laser monitoring unit and transmitted to the control module 110. The control module 110 can further determine whether the laser emitting module 120 is in a normal state according to the pulse current signal.

[0029] In this embodiment, the control module 110 determines whether the pulse current signal is valid according to the pulse trigger signal. If the pulse current signal is determined to be valid, the real-time state of the pulse laser driving circuit is determined according to the pulse current signal.

[0030] In actual use, the abnormal state of the pulse laser drive circuit can be monitored by judging whether the pulse current signal has an abnormal peak or whether the pulse current signal is stable. Specifically, when the pulse current signal has an abnormal peak or is not in a steady-state change, it is determined that the pulse laser drive circuit is abnormal. When it is determined that the pulse laser drive circuit is abnormal, the control module 110 can send a corresponding alarm prompt to remind the user to detect the pulse laser drive circuit, thereby ensuring the stability of the use of the laser device.

[0031] Before determining the real-time state of the pulse laser driving circuit according to the pulse current signal, the present embodiment can judge the validity of the pulse current signal by comparing the arrival time or waveform characteristics of the pulse trigger signal and the pulse current signal. For example, the waveforms of the pulse trigger signal and the pulse current signal can be as follows: Figure 2 shown.

[0032] In a specific application process, when the arrival time or waveform characteristics of the pulse trigger signal and the pulse current signal are inconsistent, the pulse current signal is determined to be an invalid signal. At this time, the real-time state of the pulse laser driving circuit is not further determined based on the pulse current signal. This embodiment avoids false alarms in the control module 110 by determining the validity of the pulse current signal.

[0033] In summary, the present embodiment provides a pulse laser driving circuit, which can realize high-precision driving of the laser emitting module 120 while collecting the pulse current signal of the laser emitting module 120. By judging the validity of the pulse current signal, the false alarm phenomenon in the fault self-check process of the pulse laser driving circuit is avoided. The pulse laser driving circuit provided in the present embodiment does not need to be configured with complex circuit elements, and the state monitoring of the pulse driving circuit can be realized at a relatively low cost.

[0034] According to a specific implementation of the embodiment of the present application, Figure 2 As shown, the laser emission module 120 includes at least one group of laser diodes and pulse power tubes. The driving module 130 includes multiple driving power supplies and driving signal adjustment units. Among them, the laser diode is a pulse laser diode D1, and the pulse power tube is a power tube Q1. The laser diode D1 is used to generate pulsed laser. The pulse power tube Q1 is used to perform on-off control according to the pulse signal.

[0035] The driving power supply is connected to the anode of the laser diode through the driving signal adjustment unit, the cathode of the laser diode is connected to the first end of the pulse power tube, the second end of the pulse power tube is grounded, and the control end of the pulse power tube is connected to the control module 110.

[0036] In this embodiment, the driving power supply is used to provide a driving voltage. The driving signal adjustment unit is used to adjust the charging recovery time of the pulse trigger signal between two pulse lasers and provide the laser diode D1 with the transient current required for emitting laser light.

[0037] In one embodiment, if Figure 3 As shown, the driving power supply is a high voltage power supply. The driving signal adjustment unit includes a first current limiting resistor and an energy storage capacitor. The high voltage power supply is connected to the anode of the laser diode through the first current limiting resistor. The energy storage capacitor is connected in parallel between the current limiting resistor and the laser diode.

[0038] In this embodiment, the first current limiting resistor is resistor R1, which is used to adjust the charging recovery time of the pulse trigger signal between two pulse lasers. The energy storage capacitor is capacitor C1, which is used to provide the transient current required for emitting lasers.

[0039] It should be noted that, in actual application, the first current limiting resistor R1 and the energy storage capacitor C1 may also form an LC filter circuit for filtering the driving signal provided by the driving power supply.

[0040] In this embodiment, if Figure 4As shown, if the laser emission module 120 includes multiple groups of laser diodes and pulse power tubes, then the driving module 130 includes multiple high-voltage power supplies and driving signal adjustment units, and different groups of laser diodes and pulse power tubes are provided with driving signals by corresponding high-voltage power supplies.

[0041] According to a specific implementation of the embodiment of the present application, the control module 110 includes a controller and a plurality of pulse trigger signal adjustment units, wherein the pulse trigger signal adjustment unit includes a narrow pulse generator and a driver.

[0042] One end of the narrow pulse generator is connected to the controller, the other end of the narrow pulse generator is connected to one end of the driver, and the other end of the driver is connected to the control end of the pulse power tube.

[0043] In this embodiment, the number of pulse trigger signal adjustment units corresponds to the number of laser diodes and pulse power tubes of the laser emitting module 120 .

[0044] The narrow pulse generator is used to generate a nanosecond pulse control signal according to the pulse trigger signal sent by the controller.

[0045] The driver is used to drive the pulse power tube to quickly turn on or off according to the nanosecond pulse control signal.

[0046] It should be noted that the driver in this embodiment can adopt a low potential end driver (low-end driver) to control the low potential end of the laser diode through the pulse power tube. In this embodiment, the low-end driver usually adopts a relatively simple circuit design and switching elements, and the cost is relatively low. And because the low-end driver controls the low potential end of the load, the circuit is relatively simple to implement and does not require additional isolation measures.

[0047] This embodiment uses a narrow pulse generator and a low-end driver as a pulse trigger signal adjustment unit, which can effectively reduce the circuit cost of the pulse laser driving circuit, and the circuit design is simple, easy to implement, and has wide applicability.

[0048] According to a specific implementation of the embodiment of the present application, Figure 3 , Figure 4 and Figure 5 As shown, the laser monitoring module 140 includes at least one pulse current detection unit, and the pulse current detection unit includes a second current limiting resistor and a voltage stabilizing diode.

[0049] One end of the second current limiting resistor is connected to the cathode of the laser diode, and the other end of the second current limiting resistor is connected to the control module 110. The cathode of the voltage zener diode is connected in parallel between the second current limiting resistor and the control module 110, and the anode of the voltage zener diode is grounded.

[0050] In this embodiment, the second current limiting resistor is a resistor R2, which is used to limit the amplitude of the current signal. The voltage regulator diode is a diode D2, which is used to control the output voltage of the laser emission module 120 within the IO input voltage range of the control module 110.

[0051] According to a specific implementation of the embodiment of the present application, the control module 110 further includes a shift register, and the shift register includes a plurality of data input terminals.

[0052] The laser monitoring module 140 includes a plurality of pulse current detection units, one end of the pulse current detection unit is connected to the cathode of the laser diode, the other end of the pulse current detection unit is connected to the data input end of the shift register, and the data output end of the shift register is connected to the controller.

[0053] In this embodiment, when the laser monitoring module 140 includes multiple pulse current detection power supplies, it indicates that there are multiple groups of laser diodes and pulse power tubes in the pulse laser driving circuit. At this time, a shift register is added between the controller and the second current limiting resistor R2, so that the pulse current signals of different laser diodes can be received according to the preset timing settings, thereby realizing current monitoring of multiple laser pulsers and judging the validity of the pulse current signals of multiple laser pulsers.

[0054] In actual application, when receiving the pulse current signal sent back by the pulse current detection unit, the controller can also collect the pulse current signal by judging whether the pulse current signal meets the general purpose input / output (GPIO) of the system-on-chip (SoC). When the pulse current signal meets the level standard of the GPIO interface of the controller, the controller can be directly connected to the second current limiting resistor R1. When the pulse current signal does not meet the level standard of the GPIO interface of the controller, the second current limiting resistors R1 of different pulse current detection units must be connected to the controller through a shift register.

[0055] According to a specific implementation of the embodiment of the present application, the control module 110 performs synchronous detection based on the pulse trigger signal and the pulse current signal. When the pulse trigger signal and the pulse current signal are synchronized, it is determined that the pulse current signal is valid. When the pulse trigger signal and the pulse current signal are not synchronized, it is determined that the pulse current signal is invalid.

[0056] In this embodiment, the synchronous detection determines the validity of the driving current signal by comparing the arrival time or waveform characteristics of the reference pulse trigger signal and the driving current signal. When the pulse trigger signal reaches the pulse power tube, the controller starts to monitor the pulse current signal. If the pulse current signal appears within the expected time and the waveform characteristics meet expectations, the pulse current signal is judged to be a valid signal.

[0057] In pulsed laser systems, synchronous detection methods can be used to monitor the triggering state of pulsed lasers, the stability of driving current, and the quality of laser output. By real-time monitoring and judging the effectiveness of pulsed current signals, faults or abnormalities in the laser system can be discovered and resolved in a timely manner, thereby ensuring the stable operation of the system.

[0058] According to a specific implementation of the embodiment of the present application, the control module 110 determines the real-time state of the laser emitting module 120 corresponding to the pulse current detection unit according to the pulse current signal returned by the pulse current detection unit.

[0059] In this embodiment, if Figure 3 and Figure 4 As shown, when the pulse laser driving circuit includes a single laser diode, a pulse power tube, a pulse current detection unit, a pulse trigger signal adjustment unit and a driving signal adjustment unit, the controller can directly receive the pulse current signal returned by the pulse current detection unit to complete the real-time status detection of the laser emission module 120 by detecting the abnormal peak value of the pulse current signal.

[0060] When the pulse laser driving circuit includes multiple laser diodes, pulse power tubes, pulse current detection units, pulse trigger signal adjustment units and drive signal adjustment units, the controller can receive the pulse current signals fed back from the multiple pulse current detection units through the shift register, so as to detect the abnormal peak values ​​of the pulse current signals of different laser emitting modules 120 according to the preset timing, and complete the real-time status detection of the laser emitting module 120.

[0061] In summary, this embodiment provides a pulse laser driving circuit, which can achieve high-precision control of the pulse laser through low-cost circuit element design, and while controlling the pulse laser to emit laser, it can also maintain real-time current signal monitoring of the pulse laser without introducing parasitic capacitance or stray inductance, thereby ensuring the peak power of the pulse laser and maintaining the detection signal-to-noise ratio and detection range of the laser radar.

[0062] It can be understood that the above-mentioned pulse laser driving circuit can also adopt other forms, not limited to the forms mentioned in the above embodiments, as long as it can provide a suitable driving signal and a pulse trigger signal for the pulse laser, and can obtain the pulse current signal of the pulse laser, and perform validity detection on the pulse current signal, and then complete the self-test function of the driving circuit while controlling the pulse laser to emit laser.

[0063] In one of the embodiments, a laser device is also provided, comprising the pulse laser driving circuit in the aforementioned embodiment.

[0064] In this embodiment, the laser device may be a laser radar, a laser sensor, or other device that realizes laser scanning and laser ranging by emitting pulsed laser. This embodiment does not limit the specific type of the laser device, and the laser device may be a device that can realize the laser scanning or laser ranging function.

[0065] It should be noted that the specific implementation of the laser device can refer to the specific implementation of the aforementioned pulse laser driving circuit, which will not be described in detail here.

[0066] In one embodiment, Figure 6 As shown, a laser device control method is also provided, which is applied to the laser device in the above embodiment, comprising: S601, obtaining a pulse trigger signal and a pulse current signal; S602, determining whether the pulse current signal is valid according to the pulse trigger signal; S603, when it is determined that the pulse current signal is valid, determining the real-time state of the pulse laser driving circuit according to the pulse current signal.

[0067] In this embodiment, the specific implementation of each step of the laser device control method can refer to the specific implementation of the specific components of the aforementioned pulse laser driving circuit, which will not be described in detail here.

[0068] In summary, this embodiment provides a laser device control method, which can achieve high-precision control of a pulsed laser through a low-cost circuit element design, and while controlling the pulsed laser to emit laser, it can also maintain real-time current signal monitoring of the pulsed laser without introducing parasitic capacitance or stray inductance, thereby ensuring the peak power of the pulsed laser and maintaining the detection signal-to-noise ratio and detection range of the laser radar.

[0069] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0070] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A pulse laser driving circuit, characterized in that: include: Control module, laser emission module, drive module and laser monitoring module; The driving module is connected to the laser emitting module, and the driving module provides a driving signal for the laser emitting module; the control module is connected to the laser emitting module, and the control module sends a pulse trigger signal to the laser emitting module, so that the laser emitting module emits laser according to the pulse trigger signal and the driving signal; one end of the laser monitoring module is connected to the laser emitting module, and the other end of the laser monitoring module is connected to the control module, and the laser monitoring module monitors the pulse current signal of the laser emitting module and sends the pulse current signal to the control module; The control module determines whether the pulse current signal is valid according to the pulse trigger signal; When it is determined that the pulse current signal is valid, the real-time state of the pulse laser driving circuit is determined according to the pulse current signal.

2. The circuit according to claim 1, characterized in that The laser emission module includes at least one group of laser diodes and pulse power tubes; the driving module includes multiple driving power supplies and a driving signal adjustment unit; The driving power supply is connected to the anode of the laser diode through the driving signal adjustment unit, the cathode of the laser diode is connected to the first end of the pulse power tube, the second end of the pulse power tube is grounded, and the control end of the pulse power tube is connected to the control module.

3. The circuit according to claim 2, characterized in that The driving power supply is a high voltage power supply; the driving signal adjustment unit includes a first current limiting resistor and an energy storage capacitor; The high voltage power supply is connected to the anode of the laser diode through the first current limiting resistor; The energy storage capacitor is connected in parallel between the current limiting resistor and the laser diode.

4. The circuit according to claim 2, characterized in that The control module includes a controller and a plurality of pulse trigger signal adjustment units, wherein the pulse trigger signal adjustment unit includes a narrow pulse generator and a driver; One end of the narrow pulse generator is connected to the controller, the other end of the narrow pulse generator is connected to one end of the driver, and the other end of the driver is connected to the control end of the pulse power tube.

5. The circuit according to claim 2, characterized in that The laser monitoring module includes at least one pulse current detection unit, and the pulse current detection unit includes a second current limiting resistor and a voltage stabilizing diode; One end of the second current limiting resistor is connected to the cathode of the laser diode, and the other end of the second current limiting resistor is connected to the control module; The cathode of the voltage stabilizing diode is connected in parallel between the second current limiting resistor and the control module; The anode of the Zener diode is grounded.

6. The circuit according to claim 4, characterized in that The control module further includes a shift register, and the shift register includes a plurality of data input terminals; The laser monitoring module includes a plurality of pulse current detection units, one end of each pulse current detection unit is connected to the cathode of the laser diode, the other end of each pulse current detection unit is connected to the data input end of the shift register, and the data output end of the shift register is connected to the controller.

7. The circuit according to claim 1, characterized in that The control module performs synchronous detection according to the pulse trigger signal and the pulse current signal; In the case where the pulse trigger signal and the pulse current signal are synchronized, determining that the pulse current signal is valid; In the case where the pulse trigger signal and the pulse current signal are not synchronized, it is determined that the pulse current signal is invalid.

8. The circuit according to claim 6, characterized in that The control module determines the real-time state of the laser emitting module corresponding to the pulse current detection unit according to the pulse current signal sent back by the pulse current detection unit.

9. A laser device, characterized in that: The invention comprises the pulse laser driving circuit as described in any one of claims 1 to 8.

10. A laser device control method, characterized in that: Applied to the laser device of claim 9, the method comprising: Obtaining a pulse trigger signal and a pulse current signal; Determining whether the pulse current signal is valid according to the pulse trigger signal; When it is determined that the pulse current signal is valid, the real-time state of the pulse laser driving circuit is determined according to the pulse current signal.

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