Power detection method, device, circuit and electronic equipment of laser signal

Abstract

The present application relates to the technical field of laser signal detection, and in particular to a laser signal power detection method, device, circuit and electronic equipment. The method comprises: obtaining a first voltage signal sample value of a to-be-detected laser signal after the laser signal passes through a laser detection circuit; the laser detection circuit is used for converting the to-be-detected laser signal into a first voltage signal and sampling the first voltage signal; obtaining a second voltage signal sample value of a power supply ripple sampling circuit; the power supply ripple sampling circuit and the laser detection circuit share a common ground and a common power supply; the power supply ripple sampling circuit is used for sampling a second voltage signal determined based on a set resistor, and the sampling processing mode is the same as that of the laser detection circuit for sampling the first voltage signal; and based on the first voltage signal sample value and the second voltage signal sample value, the peak power of the to-be-detected laser signal is determined. The present application can realize accurate detection of the peak power of the laser signal.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser signal detection, in particular to a laser signal power detection method, device, circuit and electronic equipment. BACKGROUND

[0002] In the related art, a common laser signal detection method is to detect the average power of the laser signal by using a power meter. However, in the application scenario of the laser signal, the peak power of the laser signal is needed to monitor the stability and safety of the laser signal. For the continuously emitted laser signal, the average power collected by the power meter is the peak power of the laser, but for the pulse emitted laser signal, the peak power of the laser cannot be obtained based on the collected average power. SUMMARY

[0003] The purpose of the present application is to provide a laser signal power detection method, device, circuit and electronic equipment to solve the technical problem that the peak power of the laser signal cannot be measured in the related art.

[0004] In a first aspect, the present application provides a laser signal power detection method, comprising:

[0005] Obtaining a first voltage signal sample value of a to-be-detected laser signal after a laser detection circuit; the laser detection circuit is used to convert the to-be-detected laser signal into a first voltage signal and sample process the first voltage signal;

[0006] Obtaining a second voltage signal sample value of a power supply ripple sampling circuit; the power supply ripple sampling circuit and the laser detection circuit share a common ground and a common power supply; the power supply ripple sampling circuit is used to sample process a second voltage signal determined based on a set resistance, and the sampling processing mode thereof is the same as the sampling processing mode of the laser detection circuit on the first voltage signal;

[0007] Based on the first voltage signal sample value and the second voltage signal sample value, determining the peak power of the to-be-detected laser signal.

[0008] In some embodiments, the determination of the peak power of the to-be-detected laser signal based on the first voltage signal sample value and the second voltage signal sample value comprises:

[0009] Based on the second voltage signal sample value, determining a power supply ripple signal value;

[0010] Based on the power supply ripple signal value and the first voltage signal sample value, determining the peak power of the to-be-detected laser signal.

[0011] As a possible implementation manner, the determining the power supply ripple signal value based on the second voltage signal sample value comprises:

[0012] determining the signal value of the second voltage signal;

[0013] determining the power supply ripple signal value based on the signal value of the second voltage signal and the second voltage signal sample value.

[0014] As an example, the sampling processing of the power supply ripple sampling circuit comprises an amplification processing of the first voltage signal; the determining the power supply ripple signal value based on the signal value of the second voltage signal and the second voltage signal sample value comprises:

[0015] determining an amplification coefficient of the amplification processing;

[0016] determining an amplified signal value based on the signal value of the second voltage signal and the amplification coefficient;

[0017] determining an amplified power supply ripple signal value based on the amplified signal value and the second voltage signal sample value;

[0018] determining the power supply ripple signal value based on the amplified power supply ripple signal value and the amplification coefficient.

[0019] In some embodiments, the determining the peak power of the to-be-detected laser signal based on the power supply ripple signal value and the first voltage signal sample value comprises:

[0020] determining a signal value of the first voltage signal based on the first voltage signal sample value and the power supply ripple signal value;

[0021] determining the peak power of the to-be-detected laser signal based on the signal value of the first voltage signal and the responsivity of the laser detection circuit.

[0022] In some embodiments, the determining the peak power of the to-be-detected laser signal based on the first voltage signal sample value and the second voltage signal sample value comprises:

[0023] if the first voltage signal sample value is greater than or equal to a sample threshold, determining the peak power of the to-be-detected laser signal based on the first voltage signal sample value and the second voltage signal sample value.

[0024] A second aspect of the present application provides a power detection device of a laser signal, comprising:

[0025] The first acquisition module is configured to acquire a first voltage signal sample value of a to-be-tested laser signal after the laser detection circuit.

[0026] The second acquisition module is configured to acquire a second voltage signal sample value of a power supply ripple sampling circuit.

[0027] The determination module is configured to determine a peak power of the to-be-tested laser signal based on the first voltage signal sample value and the second voltage signal sample value.

[0028] In a third aspect, the present application provides a power detection circuit of a laser signal, comprising:

[0029] The laser detection circuit is configured to convert a to-be-tested laser signal into a first voltage signal and sample the first voltage signal to obtain a first voltage signal sample value.

[0030] The power supply ripple sampling circuit is configured to sample a second voltage signal determined based on a set resistance to obtain a second voltage signal sample value.

[0031] The controller is connected to the output end of the laser detection circuit and the output end of the power supply ripple sampling circuit.

[0032] In some embodiments, the laser detection circuit comprises a photodetector, a first amplification circuit and a first analog-to-digital converter; the power supply ripple sampling circuit comprises a constant resistance, a second amplification circuit and a second analog-to-digital converter; wherein,

[0033] The to-be-tested laser signal is irradiated to the photodetector, the photodetector is connected between a power supply and a ground wire, a signal output end of the photodetector is connected with an input end of the first amplification circuit, and an output end of the first amplification circuit is connected with an input end of the first analog-to-digital converter; the first fixed resistor is connected with the power supply and grounded through the second fixed resistor, a voltage signal output end of the second fixed resistor is connected with an input end of the second amplification circuit, and an output end of the second amplification circuit is connected with an input end of the second analog-to-digital converter; and output ends of the first analog-to-digital converter and the second analog-to-digital converter are connected with an input end of the controller.

[0034] In a fourth aspect, the present application provides an electronic device comprising a processor and a memory storing a computer program, wherein the processor implements the laser signal power detection method of the first aspect when executing the computer program.

[0035] The laser signal power detection method, device, circuit and electronic device provided by the present application have the following beneficial effects: the present application obtains a first voltage signal sample value of a to-be-tested laser signal after the laser signal passes through a laser detection circuit and a second voltage signal sample value of a power supply ripple sampling circuit, determines the peak power of the to-be-tested laser signal based on the first voltage signal sample value and the second voltage signal sample value, can not only realize detection of the peak power of the laser signal, but also can remove the power supply ripple signal in the sampling system, and improve the accuracy of the peak power. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on the provided drawings.

[0037] Figure 1 It is a circuit schematic diagram for detecting the power of a laser signal in an embodiment of the present application;

[0038] Figure 2 It is a waveform example diagram of a real voltage signal obtained after a laser signal is converted by a photodiode;

[0039] Figure 3 It is a waveform example diagram of a power supply ripple signal;

[0040] Figure 4 It is a signal waveform example diagram obtained after a real voltage signal and a power supply ripple signal are superimposed;

[0041] Figure 5A signal waveform example diagram of the superimposed signal after the signal waveform of the amplified circuit;

[0042] Figure 6 A flowchart of a laser signal power detection method provided by an embodiment of the present application is shown in the figure;

[0043] Figure 7 A schematic diagram of a laser detection circuit and a power ripple circuit is shown in the figure;

[0044] Figure 8 A flowchart of another laser signal power detection method provided by an embodiment of the present application is shown in the figure;

[0045] Figure 9 A structural schematic diagram of a laser signal power detection device provided by an embodiment of the present application is shown in the figure;

[0046] Figure 10 A structural schematic diagram of a laser signal power detection circuit provided by an embodiment of the present application is shown in the figure;

[0047] Figure 11 A structural schematic diagram of an amplification circuit in an embodiment of the present application is shown in the figure;

[0048] Figure 12 A structural schematic diagram of an electronic device provided by an embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0049] The technical solutions of the present application will be described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0050] The present application provides a laser signal power detection method, device, circuit and electronic device.

[0051] It should be noted that in actual laser applications, it is often necessary to emit laser with narrow pulse width and high peak power. In some embodiments of the present application, laser with high peak power can be detected by a photodiode based on the circuit diagram as shown in Figure 1 Because the photodiode probe has a small range, in order to avoid damage to the probe, the laser with high peak power is first subjected to light splitting treatment, such as splitting out 2% of the laser, and then the diffuse light obtained after homogenization is irradiated on the photodiode probe. As shown in Figure 1As shown, the photodiode probe can convert the relatively weak laser signal into an electrical signal, so the converted electrical signal is also relatively weak at this time. In order to improve the measurement accuracy, the electrical signal is amplified by an amplification circuit, and then transmitted to an ADC (Analog-to-Digital Converter) and finally transmitted to an MCU (Microcontroller Unit) or FPGA (Field-Programmable Gate Array) for data reading and processing.

[0052] However, the peak power of the laser signal obtained by the above scheme will be disturbed by the power supply ripple signal. After passing through the amplification circuit, the power supply ripple signal will also be amplified to form an interference signal. For example, if the amplification factor is 20 times, and the power supply ripple signal is ±10mV at this time, it will be amplified to ±200mV interference signal. Although a filter circuit is introduced in the circuit, it cannot completely filter all frequency bands of interference ripple, so the signal received at the MCU end contains the power supply ripple signal, making the obtained power inaccurate.

[0053] Exemplarily, Figure 2 is a waveform diagram of a real voltage signal obtained after the laser signal is converted by the photodiode, Figure 3 is a waveform diagram of a power supply ripple signal, Figure 4 is a signal waveform diagram after the voltage signal and the power supply ripple signal are superimposed, Figure 5 is a signal waveform diagram after the superimposed signal passes through the amplification circuit. Figures 2 to 5 The numerical values represented by each unit of the coordinate axes are the same. As can be seen, after passing through the signal filter amplification circuit, the waveform of the superimposed power supply ripple interference signal is amplified as a whole, which seriously interferes with the power detection of the laser signal.

[0054] To solve the above problems, the present application also provides the following embodiments.

[0055] Figure 6 is a flowchart of a laser signal power detection method provided by an embodiment of the present application. As shown, Figure 6 the method can include the following steps:

[0056] Step 601: obtaining a first voltage signal sample value of a to-be-measured laser signal after passing through a laser detection circuit.

[0057] The laser detection circuit is used to convert the to-be-measured laser signal into a first voltage signal and sample the first voltage signal.

[0058] In some embodiments, the laser detection circuit may include a photodetector for converting the laser signal under test into a first voltage signal, and may further include an analog-to-digital converter for sampling data from the first voltage signal to achieve analog-to-digital signal conversion. The photodetector may be a photodiode. As an example, the analog-to-digital converter may be an ADC, such as... Figure 1 The circuit diagram shown illustrates that the laser signal under test is split and then shines onto a photodiode, converting the signal into a voltage signal. This voltage signal is then amplified by a signal filtering and amplification circuit, and finally sampled by an ADC to obtain the first voltage signal sample value. In other words, the first voltage signal sample value includes the power supply ripple signal.

[0059] Step 602: Obtain the second voltage signal sample value of the power supply ripple sampling circuit.

[0060] The power supply ripple sampling circuit and the laser detection circuit share a common ground and power supply. The power supply ripple sampling circuit is used to sample and process the second voltage signal determined based on the set resistor, and its sampling and processing method is the same as that of the laser detection circuit for sampling and processing the first voltage signal.

[0061] In other words, the power supply ripple detection circuit is a circuit in which the photodiode in the laser detection circuit is replaced with a fixed resistor, and it is used to obtain the signal value of a known voltage signal after the power supply ripple signal interference is added.

[0062] As an example, Figure 7 The diagram shows the laser detection circuit and the power supply ripple circuit, as follows. Figure 7 As shown, the laser detection circuit includes a photodiode, a signal filtering and amplification circuit 1, and an ADC1. The power supply ripple sampling circuit includes fixed resistors R3 and R4, a signal filtering and amplification circuit 2, and an ADC2. The laser detection circuit and the power supply ripple sampling circuit share a common power supply and ground. The cathode of the photodiode is connected to the power supply through a bias resistor R1, and the anode is grounded through a grounding resistor R2. The signal output terminal of the photodiode is connected to the input terminal of the signal filtering and amplification circuit 1, and the output terminal of the signal filtering and amplification circuit 1 is connected to the ADC1. Fixed resistor R3 is connected to the power supply and grounded through fixed resistor 4. The voltage signal output terminal of fixed resistor R4 is connected to the input terminal of the signal filtering and amplification circuit 2, and the output terminal of the signal filtering and amplification circuit 2 is connected to the ADC2. The output terminals of both ADC1 and ADC2 are connected to the controller. The amplification factor of signal filtering and amplification circuit 1 and signal filtering and amplification circuit 2 can be the same or different. The resistance values ​​of R4 and R2 can be the same. Therefore, based on R3 and R4, and the power supply value, the signal value of the second voltage signal can be determined. The controller is the execution subject of the laser signal power detection method in this embodiment of the invention, and can be an MCU, FPGA, etc.

[0063] At step 603, the peak power of the laser signal to be measured is determined based on the first voltage signal sample value and the second voltage signal sample value.

[0064] Since the first voltage signal sample value and the second voltage signal sample value both contain the interference of the power supply ripple signal, and the second voltage signal in the power supply ripple sampling circuit can be calculated, the peak power of the laser signal to be measured can be determined based on the first voltage signal sample value and the second voltage signal sample value.

[0065] In some embodiments, for the scenario that the laser detection circuit and the power supply ripple sampling circuit both include an amplification circuit, and the amplification coefficients are consistent, the process of determining the peak power of the laser signal to be measured based on the first voltage signal sample value and the second voltage signal sample value can include: determining the difference value of the first voltage sample signal and the second voltage sample signal; determining the signal value of the second voltage signal based on the voltage value of the power supply and the fixed value resistance; obtaining the signal value of the first voltage signal based on the above difference value and the signal value of the second voltage signal; obtaining the peak power of the laser signal to be measured based on the signal value of the first voltage signal.

[0066] Specifically, as shown in the following formula (1), the first voltage signal and the power supply ripple signal are amplified to obtain the first voltage signal sample value; as shown in the following formula (2), the second voltage signal and the power supply ripple signal are amplified to obtain the second voltage signal sample value; combining formula (1) and formula (2), the expression of the difference value of the first voltage sample signal and the second voltage sample signal is obtained, as shown in the following formula (3); based on the voltage value of the power supply in the power supply ripple sampling circuit and the fixed value resistance, the signal value of the second voltage signal can be obtained, which is substituted into formula (3), and the amplification coefficient of the amplification circuit is a known quantity, so that the signal value of the first voltage signal can be obtained; based on the following formula (4), the peak power of the voltage signal to be measured can be obtained.

[0067] (1)

[0068] (2)

[0069] (3)

[0070] (4)

[0071] wherein, the first voltage signal sample value is V1; the second voltage signal sample value is V2; the signal value of the first voltage signal is V; the signal value of the second voltage signal is V2; the power supply ripple signal value is Vr. is an amplification coefficient; is a peak power of the laser signal to be measured; is a responsivity of the laser detection circuit, and is related to a light splitting glass for splitting the laser signal and a proportion of the laser homogenization irradiation on the probe, and can be determined based on a calibration test.

[0072] In some embodiments of the present application, the peak power of the laser signal to be measured can be determined based on the first voltage signal sample value and the second voltage signal sample value.

[0073] In some embodiments of the present application, the peak power of the laser signal to be measured can be determined based on the first voltage signal sample value and the second voltage signal sample value.

[0074] It should be noted that, since the laser signal is in the form of pulses, the peak power detection can not be needed when the first voltage signal is at a low level. In some embodiments, the peak power of the laser signal to be measured can be determined based on the first voltage signal sample value and the second voltage signal sample value, which can include: if the first voltage signal sample value is within a preset range, the peak power of the laser signal to be measured is determined based on the first voltage signal sample value and the second voltage signal sample value. The preset range refers to a sample value range corresponding to the high level of the first voltage signal.

[0075] According to the power detection method of the laser signal, the first voltage signal sample value of the laser signal to be measured after passing through the laser detection circuit and the second voltage signal sample value of the power ripple sampling circuit are obtained, and the peak power of the laser signal to be measured is determined based on the first voltage signal sample value and the second voltage signal sample value, which can not only realize the detection of the peak power of the laser signal, but also can remove the power ripple signal in the sampling system, and improve the accuracy of the peak power.

[0076] Next, the implementation process of determining the peak power of the laser signal to be measured based on the first voltage signal sample value and the second voltage signal sample value will be exemplarily introduced.

[0077] Figure 8 Another flowchart of a method for detecting power of a laser signal is provided for an embodiment of the present application. As shown in Figure 8 the above embodiment, Figure 6 the implementation process of step 603 includes:

[0078] Step 801, based on the second voltage signal sampling value, determine the power supply ripple signal value.

[0079] In some embodiments, since the second voltage signal sampling value includes the interference of the power supply ripple signal value, and the signal value of the second voltage signal can be determined based on the fixed resistance in the power supply ripple sampling circuit, the power supply ripple signal value can be determined based on the second voltage signal sampling value.

[0080] As a possible implementation, the implementation process of step 801 can include:

[0081] Step 801-1, determine the signal value of the second voltage signal.

[0082] Specifically, based on the resistance value of the fixed resistance in the power supply ripple sampling circuit, the signal value of the second voltage signal is calculated. As shown in Figure 7 if the power supply is 5V, R3 is 18kΩ, and R4 is 2kΩ, the signal value of the second voltage signal is 0.5V.

[0083] Step 801-2, based on the signal value of the second voltage signal and the second voltage signal sampling value, determine the power supply ripple signal value.

[0084] In some embodiments, if the power supply ripple sampling circuit does not include an amplification circuit, that is, the sampling process does not include amplification processing of the second voltage signal, the difference between the second voltage signal sampling value and the signal value of the second voltage signal can be directly determined as the power supply ripple signal value.

[0085] In some embodiments, if the power supply ripple sampling circuit includes an amplification circuit, that is, the sampling process of the power supply ripple sampling circuit includes amplification processing of the second voltage signal, based on the signal value of the second voltage signal and the second voltage signal sampling value, the power supply ripple signal value can include: determining the amplification coefficient of the amplification processing; based on the signal value of the second voltage signal and the amplification coefficient, determining the signal value after amplification processing; based on the signal value after amplification processing and the second voltage signal sampling value, determining the power supply ripple signal value after amplification processing; based on the power supply ripple signal value after amplification processing and the amplification coefficient, determining the power supply ripple signal value. That is, referring to the following formula (5), the amplification coefficient, the signal value of the second voltage signal and the second voltage signal sampling value are substituted to obtain the power supply ripple signal value.

[0086] (5);

[0087] wherein, wherein, is a second voltage signal sample value; is a signal value of the second voltage signal; is a power supply ripple signal value; is an amplification coefficient, and in the above formula The size of the above formula can be the same or different.

[0088] Step 802, based on the power supply ripple signal value and the first voltage signal sample value, determine the peak power of the to-be-measured laser signal.

[0089] In some embodiments, based on a preset calculation model, the power supply ripple signal value and the first voltage signal sample value can be input into the calculation model to obtain the peak power of the to-be-measured laser signal output by the model. Wherein, the calculation model has been trained based on a training set including power supply ripple signal value samples and first voltage signal sample values, and corresponding laser signal peak power label values.

[0090] In other embodiments, based on the power supply ripple signal value and the first voltage signal sample value, the implementation process of determining the peak power of the to-be-measured laser signal can include the following steps:

[0091] Step 802-1, based on the first voltage signal sample value and the power supply ripple signal value, determine the signal value of the first voltage signal.

[0092] In some embodiments, for the scene where the laser detection circuit does not include an amplification circuit, the converted first voltage signal is directly delivered to the analog-to-digital converter for sampling, in this case, the difference between the first voltage signal sample value and the power supply ripple signal value can be determined as the signal value of the first voltage signal.

[0093] For the scene where the laser detection circuit includes an amplification circuit, the converted first voltage signal is first amplified and then delivered to the analog-to-digital converter for sampling, in this case, the amplification coefficient, the first voltage signal sample value and the power supply ripple signal value can be substituted into formula (1) according to the above formula (1), and the signal value of the first voltage signal can be obtained.

[0094] Step 802-2, based on the signal value of the first voltage signal and the responsivity of the laser detection circuit, determine the peak power of the to-be-measured laser signal.

[0095] As a possible implementation, the signal value of the first voltage signal and the responsivity of the laser detection circuit can be substituted into formula (4) according to the above formula (4), and the peak power of the to-be-measured laser signal can be obtained.

[0096] The power detection method of the laser signal according to the embodiment of the present application determines the power ripple signal value based on the second voltage signal sample value, and determines the peak power of the laser signal to be detected based on the power ripple signal value and the first voltage signal sample value, so that the power ripple signal can be stripped, and the accuracy of the laser power detection can be improved.

[0097] To achieve the above-mentioned embodiments, the embodiment of the present application further provides a power detection device of a laser signal.

[0098] Figure 9 A structural schematic diagram of a power detection device of a laser signal provided by the embodiment of the present application is shown in FIG. 9. Figure 9 As shown in FIG. 9, the device includes a first acquisition module 910, a second acquisition module 920 and a determination module 930.

[0099] The first acquisition module 910 is configured to acquire a first voltage signal sample value of a laser signal to be detected after the laser signal passes through a laser detection circuit.

[0100] The second acquisition module 920 is configured to acquire a second voltage signal sample value of a power ripple sampling circuit.

[0101] The determination module 930 is configured to determine the peak power of the laser signal to be detected based on the first voltage signal sample value and the second voltage signal sample value.

[0102] In some embodiments, the determination module 930 is specifically configured to:

[0103] determine a power ripple signal value based on the second voltage signal sample value;

[0104] determine the peak power of the laser signal to be detected based on the power ripple signal value and the first voltage signal sample value.

[0105] As a possible implementation manner, the determination module 930 is further configured to:

[0106] determine a signal value of the second voltage signal;

[0107] determine the power ripple signal value based on the signal value of the second voltage signal and the second voltage signal sample value.

[0108] As an example, the sampling processing of the power ripple sampling circuit includes amplification processing of the second voltage signal; and the determination module 930 is further configured to:

[0109] determining an amplification coefficient of the amplification processing;

[0110] determining a signal value after the amplification processing based on the signal value of the second voltage signal and the amplification coefficient;

[0111] determining a power supply ripple signal value after the amplification processing based on the signal value after the amplification processing and the second voltage signal sampling value;

[0112] determining the power supply ripple signal value based on the power supply ripple signal value after the amplification processing and the amplification coefficient.

[0113] In some embodiments, the determining module 930 is further configured to:

[0114] determining a signal value of the first voltage signal based on the first voltage signal sampling value and the power supply ripple signal value;

[0115] determining the peak power of the to-be-tested laser signal based on the signal value of the first voltage signal and the responsivity of the laser detection circuit.

[0116] Optionally, the determining module 930 is further configured to:

[0117] if the first voltage signal sampling value is within a preset range, determining the peak power of the to-be-tested laser signal based on the first voltage signal sampling value and the second voltage signal sampling value.

[0118] It should be noted that the above explanations about the power detection method of the laser signal are also applicable to the power detection device of the laser signal of the embodiments of the present application, which will not be repeated here.

[0119] In order to realize the above-mentioned embodiments, the present application further provides a power detection circuit of a laser signal.

[0120] Figure 10 A structural schematic diagram of a power detection circuit of a laser signal provided by the embodiments of the present application is shown in FIG. 1. As shown in the figure, the circuit includes a laser detection circuit 1010, a power supply ripple sampling circuit 1020 and a controller 1030. Figure 10

[0121] ​The laser detection circuit 1010 is configured to convert the to-be-detected laser signal into a first voltage signal and sample the first voltage signal to obtain a first voltage signal sample value; the power supply ripple sampling circuit 1020 is configured to sample a second voltage signal determined based on a set resistor to obtain a second voltage signal sample value; the power supply ripple sampling circuit and the laser detection circuit share a common ground and a common power supply, and the power supply ripple sampling circuit and the laser detection circuit have the same sampling processing mode; and the controller 1030 is connected to the output terminals of the laser detection circuit 1010 and the power supply ripple sampling circuit 1020, and is configured to execute the laser signal power detection method of the above-described embodiments.

[0122] In some embodiments, as shown in FIG. 1, the laser detection circuit 1010 includes a photodetector 1011, a first amplification circuit 1012, and a first analog-to-digital converter 1013; and the power supply ripple sampling circuit 1020 includes a first fixed resistor 1021, a second fixed resistor 1022, a second amplification circuit 1023, and a second analog-to-digital converter 1024. Figure 10

[0123] The to-be-detected laser signal is incident on the photodetector 1011, the photodetector 1011 is connected between a power supply 1014 and a ground, a signal output terminal of the photodetector 1011 is connected to an input terminal of the first amplification circuit 1012, an output terminal of the first amplification circuit 1012 is connected to an input terminal of the first analog-to-digital converter 1013; the first fixed resistor 1021 is connected to the power supply 1014 and grounded through the second fixed resistor 1022, a voltage signal output terminal of the second fixed resistor 1022 is connected to an input terminal of the second amplification circuit 1023, an output terminal of the second amplification circuit 1023 is connected to an input terminal of the second analog-to-digital converter 1024; and output terminals of the first analog-to-digital converter 1013 and the second analog-to-digital converter 1024 are both connected to an input terminal of the controller 1030.

[0124] In some embodiments, the photodetector 1011 can be a photodiode, the first analog-to-digital converter 1013 and the second analog-to-digital converter 1023 can both be ADCs, and the controller 1030 can be an MCU or an FPGA. The first fixed resistor 1021 and the second fixed resistor 1022 can each be one resistor or multiple resistors. In some embodiments, the laser detection circuit 1010 and the power supply ripple sampling circuit 1020 can also include a signal filtering circuit.

[0125] In some embodiments, the first amplification circuit 1012 and the second amplification circuit 1023 have the same circuit structure. As shown in FIG. 2, the first amplification circuit 1012 and the second amplification circuit 1023 each include a first operational amplifier 2011, a second operational amplifier 2012, a third operational amplifier 2013, and a fourth operational amplifier 2014. Figure 11 ​As shown, the first amplification circuit 1012 and the second amplification circuit 1023 can each include a buffer enhancer 1110, a filter 1120, and an amplifier 1130. The buffer enhancer 1110 is configured to reduce impedance and strengthen a current signal to output a low impedance signal. The filter 1120 is configured to filter a signal to eliminate jitter in the signal. The amplifier 1130 is configured to amplify a signal. Figure 11 As shown, the buffer enhancer 1110 includes an operational amplifier U1, an input terminal of the operational amplifier U1 serving as an input terminal of the amplification circuit, and an output terminal of the operational amplifier U1 connected to an inverting input terminal thereof. The filter 1120 includes a resistor R5 and a capacitor C1, the output terminal of the operational amplifier U1 connected to the resistor R5, and the capacitor C1 connected between the output terminal of the resistor R5 and a ground. The amplifier 1130 includes an operational amplifier U2, a resistor R6, a resistor R7, a resistor R8, and a capacitor C2, an output terminal of the operational amplifier U2 connected to a non-inverting input terminal of the operational amplifier U2, the output terminal of the operational amplifier U2 connected in series to the resistor R6 and the resistor R7, the resistor R7 grounded, the output terminal of the operational amplifier U2 connected to the inverting input terminal of the operational amplifier U2 through the resistor R6, the output terminal of the operational amplifier U2 serving as an output terminal of the amplification circuit through the resistor R8, and the capacitor C2 connected between the output terminal of the amplification circuit and the ground.

[0126] As an example of the power detection circuit of the laser signal according to an embodiment of the present application, a circuit diagram is shown in FIG. 5. Figure 7 As an example of the power detection circuit of the laser signal according to an embodiment of the present application, a circuit diagram is shown in FIG. 5.

[0127] According to the power detection circuit of the laser signal provided by the embodiment of the present application, the laser detection circuit converts the laser signal to be detected into a first voltage signal and performs sampling processing to obtain a first voltage signal sample value. The power supply ripple sampling circuit performs sampling processing on a second voltage signal determined based on a constant resistance to obtain a second voltage signal sample value. The controller based on the first voltage signal sample value and the second voltage signal sample value can not only detect the peak power of the laser signal, but also remove the power supply ripple signal in the sampling system to improve the accuracy of the peak power.

[0128] Figure 12 An example of a schematic diagram of a physical structure of an electronic device is shown in FIG. 6. Figure 12 As shown, the electronic device can include a processor 1210, a communication interface 1220, a memory 1230, and a communication bus 1240, wherein the processor 1210, the communication interface 1220, and the memory 1230 complete communication with each other through the communication bus 1240. The processor 1210 can invoke a computer program in the memory 1230 to execute the steps of the power detection method of the laser signal provided by the above-mentioned embodiments.

[0129] For example, the method comprises: obtaining a first voltage signal sample value of a to-be-tested laser signal after the laser detection circuit; the laser detection circuit is used for converting the to-be-tested laser signal into a first voltage signal and sampling the first voltage signal; obtaining a second voltage signal sample value of a power supply ripple sampling circuit; the power supply ripple sampling circuit shares a ground and a power supply with the laser detection circuit; the power supply ripple sampling circuit is used for sampling a second voltage signal determined based on a set resistor, and the sampling manner is the same as that of the laser detection circuit for sampling the first voltage signal; and determining a peak power of the to-be-tested laser signal based on the first voltage signal sample value and the second voltage signal sample value.

[0130] In addition, the logic instructions in the memory 1230 described above can be implemented in the form of a software function unit and sold or used as an independent product, and can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

[0131] On the other hand, the embodiment of the present application also provides a computer program product, which comprises a computer program, the computer program can be stored in a computer readable storage medium, and the computer program is executed by a processor, so that the computer can execute the steps of the power detection method of the laser signal provided by the above-mentioned embodiments.

[0132] On the other hand, the embodiment of the present application also provides a non-transitory computer readable storage medium, which stores a computer program, and the computer program is used to make the processor execute the power detection method of the laser signal provided by the above-mentioned embodiments.

[0133] The non-transitory computer readable storage medium can be any available medium or data storage device accessible by the processor, including but not limited to a magnetic memory (such as a floppy disk, a hard disk, a magnetic tape, a magneto-optical disk (MO), etc.), an optical memory (such as a CD, a DVD, a BD, a HVD, etc.), and a semiconductor memory (such as a ROM, an EPROM, an EEPROM, a non-volatile memory (NAND FLASH), a solid state disk (SSD)), etc.

[0134] The device embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected to achieve the purposes of the embodiments according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0135] Through the description of the above embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software and the necessary general hardware platform, and of course can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0136] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for detecting the power of a laser signal, characterized in that, include: The laser signal under test is sampled after passing through the laser detection circuit to obtain the first voltage signal sample value; the laser detection circuit is used to convert the laser signal under test into a first voltage signal and to sample the first voltage signal. The second voltage signal sample value of the power supply ripple sampling circuit is obtained; the power supply ripple sampling circuit and the laser detection circuit share a common ground and power supply; the power supply ripple sampling circuit is used to sample the second voltage signal determined based on a set resistor, and its sampling processing method is the same as that of the laser detection circuit for sampling the first voltage signal. The peak power of the laser signal under test is determined based on the first voltage signal sample value and the second voltage signal sample value. Determining the peak power of the laser signal under test based on the first voltage signal sample value and the second voltage signal sample value includes: The power supply ripple signal value is determined based on the sampled value of the second voltage signal; Based on the power supply ripple signal value and the first voltage signal sampling value, the peak power of the laser signal under test is determined; Determining the power supply ripple signal value based on the second voltage signal sample value includes: Determine the signal value of the second voltage signal; The power supply ripple signal value is determined based on the signal value of the second voltage signal and the sampled value of the second voltage signal.

2. The method according to claim 1, characterized in that, The sampling processing of the power supply ripple sampling circuit includes amplification of the second voltage signal; determining the power supply ripple signal value based on the signal value of the second voltage signal and the sampled value of the second voltage signal includes: Determine the amplification factor of the amplification process; Based on the signal value of the second voltage signal and the amplification factor, the amplified signal value is determined; Based on the amplified signal value and the sampled value of the second voltage signal, the amplified power supply ripple signal value is determined. The power ripple signal value is determined based on the amplified power ripple signal value and the amplification factor.

3. The method according to claim 1, characterized in that, Determining the peak power of the laser signal under test based on the power supply ripple signal value and the first voltage signal sampling value includes: The signal value of the first voltage signal is determined based on the first voltage signal sample value and the power supply ripple signal value. The peak power of the laser signal under test is determined based on the signal value of the first voltage signal and the responsivity of the laser detection circuit.

4. The method according to any one of claims 1-3, characterized in that, Determining the peak power of the laser signal under test based on the first voltage signal sample value and the second voltage signal sample value includes: If the first voltage signal sample value is within a preset range, the peak power of the laser signal under test is determined based on the first voltage signal sample value and the second voltage signal sample value.

5. A power detection device for a laser signal, characterized in that, The apparatus, applied to the power detection method according to any one of claims 1-4, comprises: The first acquisition module is used to acquire the first voltage signal sample value of the laser signal under test after passing through the laser detection circuit; the laser detection circuit is used to convert the laser signal under test into a first voltage signal and to sample and process the first voltage signal. The second acquisition module is used to acquire the sampled value of the second voltage signal of the power supply ripple sampling circuit; the power supply ripple sampling circuit and the laser detection circuit share a common ground and power supply; the power supply ripple sampling circuit is used to sample the second voltage signal determined based on a set resistor, and its sampling processing method is the same as the sampling processing method of the laser detection circuit for the first voltage signal; The determination module is used to determine the peak power of the laser signal under test based on the first voltage signal sample value and the second voltage signal sample value.

6. A power detection circuit for a laser signal, characterized in that, include: A laser detection circuit is used to convert the laser signal to be measured into a first voltage signal, and to sample the first voltage signal to obtain a first voltage signal sample value. A power supply ripple sampling circuit is used to sample and process a second voltage signal determined based on a set resistor to obtain a sampled value of the second voltage signal; the power supply ripple sampling circuit and the laser detection circuit share a common ground and power supply, and the sampling and processing method of the power supply ripple sampling circuit is the same as that of the laser detection circuit. The controller has its output terminals connected to both the laser detection circuit and the power ripple sampling circuit, and the controller is used to perform the power detection method for the laser signal as described in any one of claims 1-4.

7. The circuit according to claim 6, characterized in that, The laser detection circuit includes a photodetector, a first amplifier circuit, and a first analog-to-digital converter; the power supply ripple sampling circuit includes a first fixed resistor, a second fixed resistor, a second amplifier circuit, and a second analog-to-digital converter; wherein... The laser signal to be tested illuminates the photodetector, which is connected between the power supply and ground. The signal output terminal of the photodetector is connected to the input terminal of the first amplifier circuit, and the output terminal of the first amplifier circuit is connected to the input terminal of the first analog-to-digital converter. The first fixed resistor is connected to the power supply and grounded through the second fixed resistor. The voltage signal output terminal of the second fixed resistor is connected to the input terminal of the second amplifier circuit, and the output terminal of the second amplifier circuit is connected to the input terminal of the second analog-to-digital converter. The output terminals of both the first and second analog-to-digital converters are connected to the input terminal of the controller.

8. An electronic device comprising a processor and a memory storing a computer program, characterized in that, When the processor executes the computer program, it implements the power detection method for the laser signal as described in any one of claims 1-4.

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