Design of High Sensitive Power Detection System for Pulsed Laser

Wang Qiubu; Liu Wenqing; Zhang Tianshu; Fu Yibin

doi:10.3788/LOP202158.0314005

Laser & Optoelectronics Progress, Volume. 58, Issue 3, 3140051(2021)

Design of High Sensitive Power Detection System for Pulsed Laser

Wang Qiubu¹, Liu Wenqing^1,2, Zhang Tianshu^1,2、*, and Fu Yibin²

Author Affiliations

¹Institute of Physical Science and Information Technology, Anhui University, Hefei , Anhui 230601, China

²Key Laboratory of Environment Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei , Anhui 230031, China

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Figures & Tables(13)

Fig. 1. System overall design block diagram

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Fig. 2. Photoelectric conversion circuit

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Fig. 3. Peak hold and discharge circuit

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Fig. 4. Synchronous trigger circuit

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Fig. 5. Block diagram of program execution process

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Fig. 6. Timing diagram of acquisition process

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Fig. 7. Oscilloscope real-time monitoring graph

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Fig. 8. Comparison of measured peak output and ideal value

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Fig. 9. Schematic of experimental device

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Fig. 10. Linear fitting result of power and voltage

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Table 1. PS13-6b main parameters
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Table 1. PS13-6b main parameters
Symbol Value
Spectral response range /nm 350-1100
Dark current /nA 0.25
Responsivity /(A·W^-1) 0.35(λ=532 nm)
Rise time /ns 70
Active area /(mm×mm) 3.504×3.504

Table 2. Comparison of common transconductance amplifier parameters
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Table 2. Comparison of common transconductance amplifier parameters
Part number Band width /MHz Transconductance /(mA·V^-1) Slew rate /(V·μs^-1) Supply voltage /V
OPA860 80 95 900 ±5
OPA615 710 72 2500 ±5
OPA660 850 125 3000 ±5
MAX436 200 - 850 ±5

Table 3. Comparison of errors between homemade power detection system and standard power meter
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Table 3. Comparison of errors between homemade power detection system and standard power meter
Designed power meter /W Standard power meter /W Error rate /%
0.348 0.333 4.5
0.474 0.453 4.6
0.630 0.605 4.1
0.781 0.765 2.1
0.928 0.912 1.8
1.026 1.043 1.6
1.116 1.135 1.7
1.174 1.203 2.4

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Wang Qiubu, Liu Wenqing, Zhang Tianshu, Fu Yibin. Design of High Sensitive Power Detection System for Pulsed Laser[J]. Laser & Optoelectronics Progress, 2021, 58(3): 3140051

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