Acta Optica Sinica, Volume. 45, Issue 16, 1612002(2025)
Research on Asynchronous Correlation Encoding in Single-Photon Lidar Detection Technology
Figures & Tables(13)
Fig. 1. Photon detection probability distributions of single-photon detector under different gating times
Fig. 3. Correlation codes and echo signals corresponding to different encoding sequences when RRNI=10 dB. (a)‒(c) Correlation codes for chaotic sequences with code length of 2, 4, and 8, respectively; (d) correlation codes for arithmetic sequences with a code length of 4; (e)‒(g) echo signals for chaotic sequences with a code length of 2, 4, and 8, respectively; (h) echo signals for arithmetic sequences with a code length of 4
Fig. 4. Normalized autocorrelation functions of correlation codes under different encoding sequences
Fig. 5. Comparison of detection probabilities between asynchronous correlation encoding detection under different encoding sequences and pulse accumulation detection. (a) Detection probability versus RNI; (b) detection probability versus background noise photon count rate
Fig. 6. Relationships between detection probability and average echo photon number for asynchronous correlation encoding detection and pulse accumulation detection under different encoding sequences
Fig. 9. Time corresponding to the peak position of target echo signals at 10 m. (a) Pulse accumulation detection and asynchronous correlation encoding detection with background noise photon count rate of 1600 s-1; (b) pulse accumulation detection with background noise photon count rate of 198000 s-1; (c) asynchronous correlation encoding detection with background noise photon count rate of 198000 s-1
Fig. 10. Experimental data for target ranging at 10 m. (a) Histogram of pulse accumulation detection with background noise photon count rate of 1600 s-1; (b) cross-correlation function of asynchronous correlation encoding detection with background noise photon count rate of 1600 s-1; (c) histogram of pulse accumulation detection with background noise photon count rate of 198000 s-1; (d) cross-correlation function of asynchronous correlation encoding detection with background noise photon count rate of 198000 s-1
Fig. 11. Time corresponding to the peak position of target echo signals at 10.3 m with background noise photon count rate of 135000 s-1. (a) Pulse accumulation detection; (b) asynchronous correlation encoding detection
Table 1. Setting of simulation parameters
View tableTable 1. Setting of simulation parameters
Parameter Value Width of time bin /ns 2 Laser repetition frequency /kHz 20 Integral time /ms 20 Dark count of detector /s-1 8×10⁻⁶ Target reflectance 0.2 Target distance /km 4 Optical aperture of receiving system /m 1.6π×10⁻³ Detection efficiency 0.2 Optical transmittance of emitting system 0.8 Optical transmittance of receiving system 0.8 One-way atmospheric transmittance 0.8 Number of time bins 2000 Initial value of Logistic chaotic mapping 0.5556 Parameter of Logistic chaotic mapping 3.99 Modulation factor 400
Table 2. Key parameters of ACESP lidar system
View tableTable 2. Key parameters of ACESP lidar system
Key parameter Value Width of time bin /ns 2 Laser repetition frequency /kHz 20 Integral time /s 0.5 Dark count of detector /s-1 3000 Average power of laser /mW 26 Laser wavelength /nm 1064 Laser pulse width /ns 10 Detection efficiency /% 25 Detector time jitter /ps 100
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Haokun Zou, Jiying Chang, Kai Chen, Jining Li, Kai Zhong, Yuye Wang, Degang Xu, Jianquan Yao. Research on Asynchronous Correlation Encoding in Single-Photon Lidar Detection Technology[J]. Acta Optica Sinica, 2025, 45(16): 1612002
Paper Information
Category: Instrumentation, Measurement and Metrology
Received: Mar. 20, 2025
Accepted: May. 26, 2025
Published Online: Aug. 15, 2025
The Author Email: Kai Chen (chenkai_thz@tju.cdu.cn)
CSTR:32393.14.AOS250775
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