Abnormal behaviors of photovoltaic HgCdTe detectors under intense pulse laser

XU Zuo-dong; ZHANG Jian-min; LIN Xin-wei; SHAO Bi-bo; SHI Yu-bin; LI Yun-peng

doi:10.3788/OPE.20162413.0050

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Abnormal behaviors of photovoltaic HgCdTe detectors under intense pulse laser

更新时间：2020-08-13

- Abnormal behaviors of photovoltaic HgCdTe detectors under intense pulse laser
- Optics and Precision Engineering Vol. 24, Issue 10s, Pages: 50-56(2016)
- 作者机构：
  
  西北核技术研究所激光与物质相互作用国家重点实验室,陕西西安,710024
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20162413.0050
  CLC： TN215;TN249
- Received：10 May 2016，
  
  Revised：03 June 2016，
  
  Published：14 November 2016
- 稿件说明：
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徐作冬, 张检民, 林新伟等. 强脉冲激光作用下碲镉汞光伏探测器的反常行为[J]. 光学精密工程, 2016,24(10s): 50-56

XU Zuo-dong, ZHANG Jian-min, LIN Xin-wei etc. Abnormal behaviors of photovoltaic HgCdTe detectors under intense pulse laser[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 50-56
徐作冬, 张检民, 林新伟等. 强脉冲激光作用下碲镉汞光伏探测器的反常行为[J]. 光学精密工程, 2016,24(10s): 50-56 DOI： 10.3788/OPE.20162413.0050.

XU Zuo-dong, ZHANG Jian-min, LIN Xin-wei etc. Abnormal behaviors of photovoltaic HgCdTe detectors under intense pulse laser[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 50-56 DOI： 10.3788/OPE.20162413.0050.

摘要

为了研究强脉冲激光辐照下光伏型探测器的响应行为，利用室温下零偏压工作的短波红外光伏型碲镉汞单元探测器开展了实验研究。使用调制频率为1 000 Hz的2.0

m光纤激光作为探测器正常工作时探测的信号光，以不同能量的2

m波段脉冲激光作用于工作状态的探测器。实验结果显示，当入射到探测器光敏面的脉冲激光能量密度达到0.1 J/cm

量级时，在脉冲激光辐照结束后的短时间内，探测器对信号光的响应幅值出现暂时的降低，降低程度与激光强度正相关，最高可达100%：这种现象被称作信号压制效应；同时，探测器响应波形的基线从零降低为负值，基线降低幅度与激光强度正相关，随后探测器对信号光的响应幅值以及响应波形的基线在10~100 ms量级的时间内逐渐恢复到辐照前水平，这种现象被称作负基线现象。理论分析和实验测量表明，信号压制效应是由于脉冲激光引起的光敏区域温度升高所导致；而负基线现象与探测器结构和热效应相关，具体产生机理则有待进一步研究。

Abstract

The response behavior of photovoltaic detector under the laser irradiation with high-fluence pulse was researched experimentally

by using a short-wave infrared photovoltaic HgCdTe single-element detector with zero bias voltage under room temperature. Taking a 2.0

m fiber laser with modulation frequency of 1000 Hz as the signal light in normal working state

the detector was interacted with 2

m wave-band pulsed laser of different energies. Experimental results indicate that when the pulsed laser energy density on the photosensitive surface of detector reaches 0.1 J/cm

detector has two abnormal response behaviors named after signal suppression and negative baseline respectively. In the short time after pulsed laser irradiation ends

response amplitude to signal light decreases temporarily and the decrease degree with the maximum value of 100% is positively related to laser intensity. At the same time

the base line of detector response waveform decreases from zero to negative value and the decrease amplitude is positively related to laser intensity. Then

the response amplitude of detector to signal light and baseline of response waveform gradually recover to the level before irradiation within 10 ms to 100 ms. The signal suppression effect is caused by the temperature increase in photosensitive area

and the negtive baseline is correlated with thermal effect and structure of the detector.

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references

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