High-speed acquisition circuit for quasi real-time monitoring of pulse laser average power
A technology of average power, high-speed acquisition, applied in measurement circuits, photometry, optical radiation measurement, etc., can solve problems such as high cost and complex circuits, achieve quasi-real-time monitoring, ensure no distortion, and reduce losses.
Pending Publication Date: 2019-11-19
合肥利弗莫尔仪器科技有限公司
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Problems solved by technology
This type of power test method based on non-thermopile sensors generally uses an integral and hold circuit to realize the acquisition of the peak power of the pulsed laser. The integration time of this type of integral circuit has certain requirements on the input of the repetition frequency of the laser pulse, and it needs to follow the change of the laser pulse frequency. And change, the circuit is complicated, the cost is higher
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[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0016] See figure 1 and figure 2 , a high-speed acquisition circuit for quasi-real-time monitoring of pulsed laser average power, comprising a photodiode D1, a variable resistor R1, an operational amplifier U1, an RMS-DC converter U2 and a microcontroller U3 connected to a crystal oscillator circuit, The cathode of the photodiode D1 is connected to the positive pole of the DC power supply, and the cathode of the photodiode D1 is connected to the negative pol...
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The invention discloses a high-speed acquisition circuit for quasi real-time monitoring of pulse laser average power. The circuit includes a photodiode D1, a variable resistor R1, an operational amplifier U1, a RMS-DC converter U2 and a microcontroller U3, a cathode of photodiode D1 is connected to a positive pole of a direct current power supply, an anode of the photodiode D1 and an adjustable end of the variable resistor R1 are connected to an inverting input end of the operational amplifier U1, an output end of the operational amplifier U1 is connected to an input end of the RMS-DC converter U2, and the output end of the RMS-DC converter U2 is connected to an ADC module of the microcontroller U3. The circuit achieves stable transmission of electrical signals by utilizing the operationalamplifier, converts fluctuation of laser pulse into a direct current signal by utilizing the RMS-DC converter, performs high-speed sampling on an input power signal by utilizing the microcontroller,and achieves quasi real-time monitoring, control, correction and calibration of the laser average power during a photoelectric detection process.
Description
technical field [0001] The invention relates to the field of photoelectric detection, in particular to a high-speed acquisition circuit for quasi-real-time monitoring of pulsed laser average power. Background technique [0002] As the types of photoelectric detection technology become more and more diversified, the application of laser is also more and more extensive. The stability of laser power is an important factor affecting the effect of photoelectric detection. The invention discloses a novel circuit design, which is used for real-time monitoring of the average power of a pulsed laser, and can perform quasi-real-time monitoring, control, correction and calibration of the average power of the laser during the photoelectric detection process. [0003] Commonly used laser power measurement can be simply divided into two categories according to the type of sensor: [0004] The first category employs thermopile sensors. The thermopile sensor has low sensitivity and slow r...
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IPC IPC(8): G01J1/44
CPCG01J1/44G01J2001/446
Inventor 周海峰肖刚陈坚吴周令
Owner 合肥利弗莫尔仪器科技有限公司