Optical pulse signal detection device and system
By using photoelectric conversion and pulse broadening modules, the optical pulse signal is broadened to the level of hundreds of milliseconds, which solves the problem of high hardware and algorithm requirements in the existing technology and realizes simple optical pulse signal detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ACCELINK TECHNOLOGIES CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-05-19
AI Technical Summary
In existing technologies, detecting optical pulse signals using high-speed ADCs and FPGAs places high demands on hardware and FPGA algorithms, making the design complex.
The optical signal is converted into a voltage signal using a photoelectric conversion module, a pulse signal is output using a comparison module, and the narrow pulse signal is broadened to the level of hundreds of milliseconds using a pulse broadening module. The control module detects this within this time and controls the activation of the pump laser.
It simplifies hardware and program design, reduces design difficulty, and improves the accuracy and reliability of detection.
Smart Images
Figure CN224264982U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical communication technology, and in particular to an optical pulse signal detection device and system. Background Technology
[0002] Pulsed optical amplifiers are core components in optical communication, optical sensing, and autonomous driving. In the design of pulsed optical amplifiers, it is often necessary to control the pump laser based on the presence or absence of a pulsed optical signal. When there is no pulsed optical signal, the pump laser is turned off, and when there is a pulsed optical signal, the pump laser is quickly turned on.
[0003] Because the 100ns optical pulse signal is relatively narrow, it is difficult to detect its presence quickly. Existing conventional optical pulse signal detection usually uses a field programmable gate array (FPGA) in conjunction with a high-speed analog-to-digital converter (ADC) to sample the pulse optical power. The validity of the signal is judged based on the magnitude of the sampled pulse optical power, and then it is determined whether to turn on the pump laser. However, this existing technology has high requirements for hardware performance and the hardware design is also relatively complex.
[0004] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Utility Model Content
[0005] The technical problem this invention aims to solve is how to address the high requirements and design difficulties in the existing technology of detecting pulsed light signals using high-speed ADCs and FPGAs, which place high demands on the corresponding hardware and FPGA algorithms.
[0006] The present invention adopts the following technical solution:
[0007] In a first aspect, an optical pulse signal detection device is provided, comprising a photoelectric conversion module, a comparison module, a pulse broadening module, and a control module connected in sequence; the output terminal of the control module is connected to the control terminal of a pump laser.
[0008] The photoelectric conversion module is used to convert optical signals into voltage signals. When the voltage signal is higher than the comparison threshold, the comparison module is used to output a pulse signal.
[0009] The pulse broadening module is used to broaden the pulse signal.
[0010] Preferably, the pulse broadening module includes a trigger, a resistor R2, and a capacitor C2;
[0011] The input terminal of the trigger is connected to the output terminal of the comparison module;
[0012] The external resistor connection pin of the trigger is connected to one end of the resistor R2 and one end of the capacitor C2, respectively, and the other end of the resistor R2 is connected to the input voltage;
[0013] The other end of capacitor C2 is connected to the external capacitor connection pin of the trigger;
[0014] The output of the trigger is connected to the control module.
[0015] Preferably, the trigger is model 74HC123.
[0016] Preferably, the pulse broadening module includes a delay unit, a capacitor C7, and a resistor R14;
[0017] The output of the comparison module is connected to the main reset pin of the delay unit and one end of the resistor R14, respectively, and the other end of the resistor R14 is connected to the input voltage.
[0018] One end of capacitor C7 is connected to the delay pin of the delay unit, and the other end of capacitor C7 is grounded.
[0019] The reset pin of the delay unit is connected to the control module.
[0020] Preferably, the delay unit is of model TPV8308LPADJ, MAX705, MAX706 or MAX813L.
[0021] Preferably, the photoelectric conversion module includes a photodiode PD1 and a resistor R6;
[0022] The negative terminal of the photodiode PD1 is connected to the input voltage, and the positive terminal of the photodiode PD1 is connected to one end of the resistor R6 and one input terminal of the comparison module. The other end of the resistor R6 is grounded. The other input terminal of the comparison module is connected to the comparison threshold.
[0023] Preferably, the comparison module includes a comparator, resistor R7, and resistor R8;
[0024] One end of resistor R8 is connected to the input voltage, and the other end of resistor R8 is connected to one end of resistor R7 and the inverting input of the comparator, respectively. The other end of resistor R7 is grounded.
[0025] The non-inverting input of the comparator is connected to the output of the photoelectric conversion module, and the output of the comparator is connected to the input of the pulse broadening module.
[0026] Preferably, the optical pulse signal detection device further includes an output module, the input terminal of which is connected to the output terminal of the control module, and the output terminal of which is connected to the control terminal of the pump laser.
[0027] Preferably, the output module includes a switching transistor Q1;
[0028] The output terminal of the control module is connected to the control terminal of the switching transistor Q1, and the source of the switching transistor Q1 is grounded; the positive terminal of the pump laser is connected to the input voltage, and the negative terminal of the pump laser is connected to the drain of the switching transistor Q1.
[0029] In a second aspect, an optical pulse signal detection system is provided, including an optical pulse signal detection device as described in the first aspect and a pump laser, wherein the output terminal of the control module is connected to the control terminal of the pump laser.
[0030] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0031] This invention converts a 100ns wide optical signal into a voltage signal using a photoelectric conversion module. The voltage signal is input to a comparison module. When the voltage signal is higher than the comparison threshold, the comparison module outputs a 100ns wide pulse signal. Then, a pulse broadening module is used to broaden the 100ns wide pulse signal to the 100ms level. The control module has enough time to detect the broadened level within this 100ms time. Once a valid signal is detected, the subsequent pump laser is turned on.
[0032] In summary, this invention solves the problem of detecting the validity of optical pulse signals by using low-speed analog devices and control modules, and the hardware and program design is relatively simple. Attached Figure Description
[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0034] Figure 1 This is a schematic diagram of the structure of a light pulse signal detection device provided in an embodiment of the present invention;
[0035] Figure 2 This is a schematic diagram of the structure of a control module provided in an embodiment of the present utility model;
[0036] Figure 3This is another structural schematic diagram of a light pulse signal detection device provided in an embodiment of the present invention;
[0037] Figure 4 This is a schematic diagram of the structure of an output module provided in an embodiment of this utility model;
[0038] Figure 5 This is a schematic diagram of the specific structure of a light pulse signal detection device provided in an embodiment of the present invention;
[0039] Figure 6 This is a schematic diagram of the output waveform of a pulse broadening module provided in an embodiment of this utility model;
[0040] Figure 7 This is a schematic diagram of the structure of a pulse broadening module provided in an embodiment of the present invention;
[0041] Figure 8 This is a schematic diagram of the output waveform of another pulse broadening module provided in this embodiment of the present invention;
[0042] Figure 9 This is a schematic diagram of the structure of an optical pulse signal detection system provided in an embodiment of this utility model. Detailed Implementation
[0043] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0044] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as openly inclusive, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples; that is, although they may be incorporated into embodiments or examples using the above terms for reasons such as order and position, it does not limit them to be incorporated in combination by a single embodiment or example.
[0045] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more. Furthermore, for example, the description may use the prefix "A" or "B" to describe the same type of nouns as two independent entities. In this case, the features defined with "A" and "B" are used only to distinguish between similar entities and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.
[0046] In describing some embodiments, the terms "coupled," "coupled," and "connected," and their derivative expressions, may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact with each other. Similarly, the term "coupled" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact. However, the terms "connected" or "coupled" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other, such as "optical coupling" or "wireless connection." The embodiments disclosed herein are not necessarily limited to the scope of this invention.
[0047] Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0048] Example 1:
[0049] To address the challenges of high hardware and FPGA algorithm requirements and complex design in existing technologies for detecting optical pulse signals using high-speed ADCs and FPGAs, one embodiment, such as... Figure 1 As shown in the figure, this embodiment proposes an optical pulse signal detection device, which includes a photoelectric conversion module, a comparison module, a pulse broadening module, and a control module connected in sequence; the output terminal of the control module is connected to the control terminal of the pump laser; the photoelectric conversion module is used to convert the optical signal into a voltage signal, and when the voltage signal is higher than the comparison threshold, the comparison module is used to output a pulse signal; the pulse broadening module is used to broaden the pulse signal.
[0050] The photoelectric conversion module converts the received optical pulse signal into an electrical signal, and then the comparison module compares the electrical signal output by the photoelectric conversion module with a comparison threshold. In one embodiment, when the input electrical signal is higher than the comparison threshold, the comparison module outputs a high level; when the input electrical signal is lower than the comparison threshold, the comparison module outputs a low level, thereby converting the continuously changing electrical signal into a discrete digital level signal for easier subsequent processing.
[0051] In one embodiment, the comparison threshold may come from the control module, which outputs a comparison threshold to the comparison module. In other embodiments, the comparison threshold may also be generated by other circuits, and a preset comparison threshold can be obtained by setting the parameters of the corresponding devices.
[0052] In one embodiment, the digital level signal output by the comparison module has a narrow pulse width (typically only on the order of hundreds of nanoseconds), making it a narrow pulse signal. In one embodiment, such as... Figure 2 As shown, the control module can be an MCU, and an MCU requires a certain number of clock cycles to execute an instruction. Although modern MCUs operate at high speeds, such as some common 32-bit MCUs with operating frequencies of tens of MHz or even higher, even at high frequencies, several clock cycles are still required from reading the pin level status, performing data processing and judgment, to completing the entire detection process. Taking the STM32F103 series MCU with an operating frequency of 72MHz as an example, one of its clock cycles is approximately 13.9ns. Executing a simple instruction may require several clock cycles, and complex instructions require even more. For narrow pulse signals in the hundreds of ns range, the MCU may miss the signal before completing the entire detection process, causing errors in subsequent detections.
[0053] Therefore, by using the pulse widening module, the narrow pulse signal is widened into a pulse signal with a suitable width (i.e., PULSE SIGNAL), achieving a pulse signal with a pulse width on the order of hundreds of milliseconds. The duration of a signal on the order of hundreds of milliseconds (1ms = 1,000,000ns) is much longer than that on the order of hundreds of milliseconds, which can ensure that the MCU has sufficient time to complete the instruction sequence related to level detection, thereby ensuring the correctness and stability of subsequent detection.
[0054] In one embodiment, after receiving a signal with a pulse width on the order of hundreds of milliseconds, the control module sends a corresponding digital signal to the control terminal of the pump laser to control the pump laser to emit light. In one embodiment, such as... Figure 3 As shown, the optical pulse signal detection device further includes an output module, the input terminal of which is connected to the output terminal of the control module, and the output terminal of which is connected to the control terminal of the pump laser.
[0055] In one embodiment, such as Figure 4 As shown, the output module includes a switching transistor Q1; the output terminal of the control module is connected to the control terminal of the switching transistor Q1 (i.e., the control terminal of the corresponding pump laser), and the source of the switching transistor Q1 is grounded; the positive terminal of the pump laser (i.e., LD2) is connected to the input voltage, and the negative terminal of the pump laser is connected to the drain of the switching transistor Q1.
[0056] When the control module outputs a valid digital signal, the switch Q1 is turned on, causing the pump laser to start emitting light. For other structural details of the output module, please refer to [reference needed]. Figure 4 In this embodiment, no further explanation is needed. The output module controls the conduction of the drive current of the pump laser according to the corresponding digital signal, thereby controlling the working state of the pump laser and ultimately realizing the entire process of turning on the pump laser when a pulse light signal is detected.
[0057] In summary, traditional methods for detecting optical pulse signals using high-speed ADCs and FPGAs present significant challenges. High-speed ADCs require high-speed sampling and processing of large amounts of data, placing high demands on hardware performance. FPGAs, on the other hand, require complex algorithms for signal processing and analysis, resulting in significant design difficulty and long development cycles. The optical pulse signal detection device proposed in this embodiment processes signals step-by-step through various functional modules, replacing the high-speed sampling and complex data processing functions of high-speed ADCs with simpler circuits (such as comparators and pulse broadening chips). The control module uses a conventional microcontroller, which only needs to process the broadened pulse signal, reducing the difficulty of algorithm design. Overall, the modular and functional design simplifies hardware and algorithm requirements and reduces design complexity.
[0058] It is worth noting that all the methods described in this embodiment are existing technologies and will not be explained in detail in this embodiment.
[0059] In order to convert the received pulsed optical signal into an electrical signal, in one embodiment, such as Figure 5 As shown, the photoelectric conversion module includes a photodiode PD1 and a resistor R6; the negative terminal of the photodiode PD1 is connected to the input voltage, the positive terminal of the photodiode PD1 is connected to one end of the resistor R6 and one input terminal of the comparison module, and the other end of the resistor R6 is grounded; the other input terminal of the comparison module is connected to the comparison threshold.
[0060] The photodiode is used to receive pulsed light signals and generate photocurrent based on the pulsed light signals. Resistor R5 is used to generate a voltage signal based on the photocurrent and transmit the voltage signal to one input terminal of the comparison module. Resistor R6 is used as a pull-down resistor to prevent one input terminal of the comparison module from being left floating.
[0061] In one embodiment, refer to Figure 5 The comparison module includes a comparator, resistor R7, and resistor R8; one end of resistor R8 is connected to the input voltage, and the other end of resistor R8 is connected to one end of resistor R7 and the inverting input of the comparator, respectively, and the other end of resistor R7 is grounded; the non-inverting input of the comparator is connected to the output of the photoelectric conversion module, and the output of the comparator is connected to the input of the pulse broadening module.
[0062] In this embodiment, resistors R7 and R8 form a voltage divider unit. Based on the two methods for obtaining the comparison threshold mentioned above, this embodiment obtains the comparison threshold through the voltage divider unit. Specifically, the input voltage can be 5V. The input voltage is divided by resistors R7 and R8 to obtain the corresponding comparison threshold. The comparator then compares the comparison threshold with the voltage signal transmitted from resistor R5. In one embodiment, when the comparison threshold is less than the voltage signal, the comparator outputs a low-level signal; otherwise, the comparator outputs a high-level signal. In one embodiment, the comparator can be a MAX913.
[0063] The comparator outputs a high-level pulse signal with a width on the order of nanoseconds. To broaden this pulse width so that the control module can accurately identify and process the corresponding signal, this embodiment proposes two structures to broaden the pulse width of the high-level pulse signal output by the comparator. In one embodiment, the first structure refers to... Figure 5 As shown, the pulse broadening module includes a trigger (i.e., U2), a resistor R2, and a capacitor C2; the input terminal of the trigger (i.e., pin 1B) is connected to the output terminal of the comparator module; the external resistor connection pin of the trigger (i.e., pin 1REXT) is connected to one end of the resistor R2 and one end of the capacitor C2, respectively, and the other end of the resistor R2 is connected to the input voltage; the other end of the capacitor C2 is connected to the external capacitor connection pin of the trigger (i.e., pin 1CEXT); the output terminal of the trigger (i.e., pin 1Q) is connected to the control module. In one embodiment, the trigger is a 74HC123.
[0064] In one embodiment, the widened pulse width WIDTH_PULSE is calculated as follows:
[0065] WIDTH_PULSE = K * R2 * C2 = 0.45 * 2.7 * 100000 ns = 121.5 μs; where K is a constant, R2 is the resistance of resistor R2, and C2 is the resistance of capacitor C2.
[0066] like Figure 6The figures show the pulse waveforms of the input signal at pin 1B (i.e., the narrow pulse waveform output by the comparator), the input signal at pin 1A, and the output signal at pin 1Q, respectively. It can be seen that the pulse width of the narrow pulse waveform output by the comparator is increased from t1 to t2 by the flip-flop.
[0067] In one embodiment, the second structure is as follows: Figure 7 As shown, the pulse broadening module includes a delay unit (i.e., U3), a capacitor C7, and a resistor R14. The output terminal of the comparator module is connected to the main reset pin (i.e., pin) of the delay unit and one end of the resistor R14, with the other end of the resistor R14 connected to the input voltage. One end of the capacitor C7 is connected to the delay pin (i.e., CT pin) of the delay unit, and the other end of the capacitor C7 is grounded. The reset pin (i.e., pin) of the delay unit is connected to the control module. In one embodiment, the delay unit is of model TPV8308LPADJ, MAX705, MAX706, or MAX813L.
[0068] Capacitor C7 is connected to the CT pin of the delay circuit. During operation, the charging and discharging characteristics of capacitor C7 determine the delay time. When the delay circuit starts working, the power supply charges capacitor C7 through an internal or external resistor. As charging progresses, the voltage across the capacitor gradually increases. When the voltage reaches a threshold set internally by the delay circuit, the delay circuit changes state, completing one delay cycle. The delay time is related to the capacitance of capacitor C7 and the value of the associated resistor, typically following a specific time constant formula. The delay time can be adjusted by changing the capacitance of C7.
[0069] Resistor R14 provides a suitable bias voltage to the MR pin of the delay unit, enabling the pin to sense the input signal status. When the comparator output level changes, resistor R14 transmits the corresponding voltage change to the pin, thereby controlling operations such as resetting the delay unit. Simultaneously, resistor R14 also limits the current flowing into the MR pin of the delay unit, preventing excessive current from damaging the chip pins and protecting the chip.
[0070] In the entire pulse broadening module, the change in the comparator output signal first acts on the pin of the delay unit through resistor R14, triggering the relevant operation of the delay unit. Then, through capacitor C7, it works with the internal circuitry of the delay unit to charge and discharge according to a set time constant. Finally, the broadened pulse signal is output from the pin of the delay unit to the control module. In one embodiment, such as... Figure 8 The figures show the input signal waveform of the pin and the output signal waveform of the pin, respectively.
[0071] In summary, to ensure the reliability of the detection results, the control module typically performs multiple sampling and judgments. It reads the pin level multiple times within the signal duration and performs statistical analysis on the results to eliminate erroneous detections caused by occasional noise interference. The signal duration of hundreds of milliseconds obtained through the two broadening methods described above meets the requirements of the control module for multiple sampling and reliable judgment, significantly improving the accuracy and reliability of detection compared to narrow pulse signals in the nanosecond range (output by a comparator).
[0072] Other aspects of the optical pulse signal detection device will not be described in detail in this embodiment; please refer to the corresponding accompanying drawings for specific details.
[0073] In this embodiment, a photoelectric conversion module converts a 100ns wide optical signal into a voltage signal. The voltage signal is input to a comparison module. When the voltage signal is higher than the comparison threshold, the comparison module outputs a 100ns wide pulse signal. Then, a pulse stretching module is used to stretch the 100ns wide pulse signal to the 100ms level. The control module has enough time to detect the stretched level within this 100ms time. When a valid signal is detected, the subsequent pump laser is turned on.
[0074] In summary, this invention solves the problem of detecting the validity of optical pulse signals by using low-speed analog devices and control modules, and the hardware and program design is relatively simple.
[0075] Example 2:
[0076] This embodiment proposes an optical pulse signal detection system. In one embodiment, such as... Figure 9 As shown, it includes an optical pulse signal detection device as described in Embodiment 1 and a pump laser, and the output terminal of the control module is connected to the control terminal of the pump laser.
[0077] For the specific structure of the optical pulse signal detection device, please refer to Embodiment 1, which will not be repeated in this embodiment.
[0078] In this embodiment, a photoelectric conversion module converts a 100ns wide optical signal into a voltage signal. The voltage signal is input to a comparison module. When the voltage signal is higher than the comparison threshold, the comparison module outputs a 100ns wide pulse signal. Then, a pulse stretching module is used to stretch the 100ns wide pulse signal to the 100ms level. The control module has enough time to detect the stretched level within this 100ms time. When a valid signal is detected, the subsequent pump laser is turned on.
[0079] In summary, this invention solves the problem of detecting the validity of optical pulse signals by using low-speed analog devices and control modules, and the hardware and program design is relatively simple.
[0080] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A light pulse signal detection device, characterized in that, It includes a photoelectric conversion module, a comparison module, a pulse broadening module, and a control module connected in sequence; the output terminal of the control module is connected to the control terminal of the pump laser. The photoelectric conversion module is used to convert optical signals into voltage signals. When the voltage signal is higher than the comparison threshold, the comparison module is used to output a pulse signal. The pulse broadening module is used to broaden the pulse signal.
2. The optical pulse signal detection device according to claim 1, characterized in that, The pulse broadening module includes a trigger, a resistor R2, and a capacitor C2; The input terminal of the trigger is connected to the output terminal of the comparison module; The external resistor connection pin of the trigger is connected to one end of the resistor R2 and one end of the capacitor C2, respectively, and the other end of the resistor R2 is connected to the input voltage; The other end of capacitor C2 is connected to the external capacitor connection pin of the trigger; The output of the trigger is connected to the control module.
3. The optical pulse signal detection device according to claim 2, characterized in that, The trigger is model number 74HC123.
4. The optical pulse signal detection device according to claim 1, characterized in that, The pulse broadening module includes a delay unit, a capacitor C7, and a resistor R14. The output of the comparison module is connected to the main reset pin of the delay unit and one end of the resistor R14, respectively, and the other end of the resistor R14 is connected to the input voltage. One end of capacitor C7 is connected to the delay pin of the delay unit, and the other end of capacitor C7 is grounded. The reset pin of the delay unit is connected to the control module.
5. The optical pulse signal detection device according to claim 4, characterized in that, The delay unit is model TPV8308LPADJ, MAX705, MAX706 or MAX813L.
6. The optical pulse signal detection device according to claim 1, characterized in that, The photoelectric conversion module includes a photodiode PD1 and a resistor R6; The negative terminal of the photodiode PD1 is connected to the input voltage, and the positive terminal of the photodiode PD1 is connected to one end of the resistor R6 and one input terminal of the comparison module. The other end of the resistor R6 is grounded. The other input terminal of the comparison module is connected to the comparison threshold.
7. The optical pulse signal detection device according to claim 1, characterized in that, The comparison module includes a comparator, resistor R7, and resistor R8; One end of resistor R8 is connected to the input voltage, and the other end of resistor R8 is connected to one end of resistor R7 and the inverting input of the comparator, respectively. The other end of resistor R7 is grounded. The non-inverting input of the comparator is connected to the output of the photoelectric conversion module, and the output of the comparator is connected to the input of the pulse broadening module.
8. The optical pulse signal detection device according to claim 1, characterized in that, The optical pulse signal detection device further includes an output module, the input terminal of which is connected to the output terminal of the control module, and the output terminal of which is connected to the control terminal of the pump laser.
9. The optical pulse signal detection device according to claim 8, characterized in that, The output module includes a switching transistor Q1; The output terminal of the control module is connected to the control terminal of the switching transistor Q1, and the source of the switching transistor Q1 is grounded; the positive terminal of the pump laser is connected to the input voltage, and the negative terminal of the pump laser is connected to the drain of the switching transistor Q1.
10. A light pulse signal detection system, characterized in that, The device includes the optical pulse signal detection device as described in any one of claims 1-9 and the pump laser, wherein the output terminal of the control module is connected to the control terminal of the pump laser.