Laser & Optoelectronics Progress, Volume. 59, Issue 16, 1611001(2022)
Simulation Techniques of a Space-Borne Single-Photon Counting Imaging System
Figures & Tables(12)
Fig. 6. Photon number of pulse laser echo in different orbit altitudes. (a) Orbit altitude 36000 km; (b) orbit altitude 500 km; (c) orbit altitude 250 km; (d) orbit altitude 50 km
Fig. 7. Photon number of pulse laser echo in same replication number and different gate number. (a) Replication number 100,gate number 2000; (b) replication number 100,gate number 200; (c) replication number 100,gate number 20; (d) replication number 100,gate number 4
Fig. 8. Photon number of pulse laser echo when replication number not less than gate number. (a) Replication number 2000,gate number 2000; (b) replication number 2000,gate number 1000; (c) replication number 1000,gate number 1000; (d) replication number 1000,gate number 200
Table 1. Pulse laser parameters
View tableTable 1. Pulse laser parameters
Parameter Nominal value Wavelength /nm 1550 Half pulse width PW /ns 10 Pulse energy E /mJ 20 Pulse repetition frequency flaser /Hz 2000 Average power /W 40
Table 2. Optical system parameters
View tableTable 2. Optical system parameters
Parameter Nominal value Focal length f /m 6.5 F# 6.5 Transmittance ρ 0.9
Table 3. SPAD parameters
View tableTable 3. SPAD parameters
Parameter Nominal value Array size 16×16 Pixel size p /μm 10 Filling factor FFF 0.6 Photon detection efficiency EPDE 0.3 Dark count rate RDCR /s-1 107 Dead time TDT /ns 100 Timing jitter /ps 50
Table 4. Simulation results of ranging accuracy
View tableTable 4. Simulation results of ranging accuracy
No. Replication Gate Peak value Peak time /s Time accuracy /s Ranging accuracy /m 1 2000 2000 430 0.0033+1.9450×10-8 6.0000×10-10 0.0900 2 2000 1000 579 0.0033+2.1200×10-8 1.1500×10-9 0.1725 3 1000 1000 294 0.0033+1.9000×10-8 1.0500×10-9 0.1575 4 1000 200 510 0.0033+2.3000×10-8 2.9500×10-9 0.4425
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Zhongqiu Xia, Haizhi Song, Yanli Shi, Yongchao Zheng. Simulation Techniques of a Space-Borne Single-Photon Counting Imaging System[J]. Laser & Optoelectronics Progress, 2022, 59(16): 1611001
Paper Information
Category: Imaging Systems
Received: May. 13, 2022
Accepted: Jun. 22, 2022
Published Online: Aug. 8, 2022
The Author Email: Zhongqiu Xia (xiazhongqiu@126.com)
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