Author Affiliations
Abstract
1 Beijing Institute of Tracking and Telecommunications Technology, Beijing 100094, China
2 Key Laboratory of Space Object Measurement, Beijing 100094, China
This Letter introduces a trigger-controlled Geiger-mode avalanche photodiode (GM-APD). A hierarchical look-back-upon tree recurrence method is given to predict the performance of trigger-controlled GM-APDs under different trigger-count upper limits. In addition, the normalized detection probability is defined to evaluate the detection performance of trigger-controlled GM-APDs in typical weak optical signal detection (impulse noise and continuous noise situations). Theoretical analyses show that the trigger-controlled GM-APD improves the detection performance of GM-APDs in weak optical signal detection via the optimization of the trigger-count upper limit, compared with single-trigger and multi-trigger GM-APDs.
280.3420 Laser sensors 040.1345 Avalanche photodiodes (APDs) 280.4788 Optical sensing and sensors Chinese Optics Letters
2016, 14(4): 042801
1 北京跟踪与通信技术研究所, 北京 100094
2 空间目标测量重点实验室, 北京 100094
3 国防科学技术大学理学院, 湖南 长沙 410073
为解决激光漫反射测距实测数据噪点多，真实回波信号难以可靠在线提取问题，提出一种基于时间相关性的激光漫反射测距回波信号的快速提取方法。基于实测数据特性分析将回波信号提取问题简化为n 点搜索问题，并理论验证了基于时间相关性提取方法的正确性，通过权衡搜索代价与提取精度，给出n 点选取规则。给出短时数据线性度和相邻数据关联度作为时间相关性的具体评价指标，设计遗传算法对缓存数据与在线数据并行寻优，降低搜索时间并提高测距提取精度。中国科学院云南天文台实测数据提取结果表明，该方法对强噪声背景下的微弱回波信号有较强的快速提取能力，为激光漫反射测距回波信号在线提取提供可行思路。
测量 激光漫反射测距 回波信号提取 时间相关性 遗传算法 并行寻优 光学学报
2015, 35(10): 1028002
