Wei Li, Zhixue Wu, Qingwei Wang, Ruixin Li, Qinghui Li, Mingjian Ju, Zichao Gao, Xin Shang, Long Tian, Yaohui Zheng. Integrated Resonant Photodetector with High Signal-to-Noise Ratio[J]. Acta Optica Sinica, 2023, 43(7): 0727001
- Acta Optica Sinica
- Vol. 43, Issue 7, 0727001 (2023)
Fig. 1. Block diagram of resonance frequency measurement of RPD
Fig. 2. Layout of the LC resonant circuit and its equivalent circuit. (a) LC resonant circuit; (b) equivalent circuit
Fig. 3. Circuit diagram of resonant photodetector
Fig. 4. Experimental device for measuring the transfer function of photodetector and error signal for servo control system
Fig. 5. Gain comparison of BPD and RPD that has a resonant frequency of 20 MHz and a 3 dB bandwidth of 0.285 MHz
Fig. 6. Comparison of error signals for cavity-locking of RPD and BPD. (a) RPD; (b) BPD
Fig. 7. Comparison of signal-to-noise ratio of BPD and RPD error signals
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Table 1. Performance comparison of resonant structure detection systems
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