Bin LI, Xiaofang WANG, Yan KANG, Yazhou YUE, Weiwei LI, Yixin ZHANG, Hongjie LEI, Tongyi ZHANG. Experimental Analysis of Coherent Velocity Measurement Based on Near-infrared Single-element SPAD Detector[J]. Acta Photonica Sinica, 2024, 53(1): 0104001
- Acta Photonica Sinica
- Vol. 53, Issue 1, 0104001 (2024)
Fig. 1. Schematic of single photon heterodyne velocity measurement experimental system
Fig. 2. Photograph of single photon heterodyne velocity measurement experimental system
Fig. 3. Data processing flow of coherent beat signal spectrum analysis
Fig. 4. The spectrums of the beat frequency signal under PCR of 134，270，428，545，640，800，902 and 920 kHz，respectively，DCR=1.8 kHz
Fig. 5. The signal amplitude，noise amplitude and SNR of spectrum under different PCR，DCR=1.8 kHz
Fig. 6. The spectrums of the beat frequency signal under PCR of 200，350，490，610，720，830，902，920，928，946，965，978，992，994，997 and 1 009 kHz，DCR=52.4 kHz
Fig. 7. Enlarged partial view of harmonic components in Fig.6（j），（m），（p）
Fig. 8. The signal amplitude，noise amplitude and SNR of spectrum under different PCR，DCR=52.4 kHz
Fig. 9. The spectrum of the beat frequency signal under different photon count rates，DCR=194.4 kHz
Fig. 10. The signal amplitude，noise amplitude and SNR of spectrum under different PCR，DCR=194.4 kHz
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Table 1. System parameters
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Table 2. SNR of spectrum under different photon count rates，DCR=52.4 kHz
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Table 3. SNR of spectrum under different PCR，@DCR=194.4 kHz
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