摘要
实验研究发现短脉冲激光可诱导光伏型碲镉汞(HgCdTe)探测器产生噪声增强的现象,通过设计系统的对比实验,明确了此类噪声增强效应产生的根源和诱导途径,并对该类噪声增强效应的抑制方法提出了建议。研究结果表明,此类噪声增强效应源于短脉冲激光器的放大级电源;该放大级电源处于高频工作态,会产生较强的电磁脉冲,该电磁脉冲通过自由空间传播直接诱导探测器工作电路产生噪声增强效应,与探测器和激光器间外接链接电路和光敏元无主要关联。静电屏蔽罩、加长探测器与激光器的距离等方法可有效降低该类噪声。
The noise enhancement effect of photovoltaic HgCdTe detectors caused by ultrashort pulse laser is discovered in experimental study,and its source and induction routes are researched through the experiments.The suggestions to suppress the noise enhancement effect are proposed.Experimental results show that the noise enhancement effect is primarily caused by the amplifying power supply of the ultrashort pulse laser at high-frequency which would produce stronger electromagnetic pulse.The electromagnetic pulse passes through free space to induce directly the circuits of detectors to produce noise enhancement effect,and the external link circuit between the detector and the laser and the photosensitive element is not the main association.Electrostatic shield and extending the distance between the detector and the laser can effectively reduce this kind of noise.
作者
张月
王睿
ZHANG Yue;WANG Rui(College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China)
出处
《光电技术应用》
2018年第1期24-29,共6页
Electro-Optic Technology Application
关键词
噪声增强
光电探测器
脉冲激光
noise enhancement
photoelectric detector
pulse laser
