摘要
为了论证单光子成像技术天基应用可行性,分析了光学系统后向散射影响消除、单光子雪崩光电探测噪声抑制、自由运行模式等关键问题。基于偏振滤波理论、泊松统计滤波理论,选取重尾型脉冲激光函数,采用蒙特卡罗仿真方法,构建了星载单光子计数成像系统仿真模型,并仿真了不同轨道高度、不同重复次数和门控时间间隔条件下的光子计数结果。结果表明,脉冲激光回波光子计数波形与发射波形相近,仿真情况与实际相符,单光子成像距离存在阈值,当重复次数低于开门次数时,存在漏检现象。根据本研究的参数设置,在500 km的轨道高度上,当重复次数为2000、开门次数为2000时,激光测距精度可达0.09 m。所提相关方法可以为星载单光子计数成像系统指标分配和在轨参数调整提供技术支撑。
To demonstrate the feasibility of space-borne applications of single-photon imaging technology,this study analyzes the elimination of the backscattering effect in the optical system,suppression of the single-photon avalanche photoelectric detection noise,and the free running mode.Next,the space-borne single-photon counting imaging system is modeled using a heavy tailed pulse laser function and the Monte Carlo method.The echo photon counting results are simulated for different conditions of orbit altitude,replication number,and gate number.The results show that the echo photon counting waveform is similar to the transmission waveform,as observed in reality.Single-photon imaging is possible within a certain distance threshold.Detections are missed when the replication number is lower than the gate number.The range accuracy can reach 0.09 m when the replication and gate numbers are both set to 2000 at an orbit altitude of 500 km based on the parameter set in this study.The methods in this paper provide technical support for the index allocation and on-orbit parameter adjustment of a space-borne single-photon counting imaging system.
作者
夏中秋
宋海智
史衍丽
郑永超
Xia Zhongqiu;Song Haizhi;Shi Yanli;Zheng Yongchao(Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China;South-West Institute of Technical Physics,Chengdu 610041,Sichuan,China;School of Physics and Astronomy,Yunnan University,Kunming 650091,Yunnan,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2022年第16期217-225,共9页
Laser & Optoelectronics Progress
关键词
成像系统
单光子成像
时间相关单光子计数
蒙特卡罗仿真
单光子雪崩光电探测器
星载
imaging systems
single-photon imaging
time-correlated single-photon counting
Mont Carlo simulation
single-photon avalanche diode
space-borne
