Bin LI, Hongjie LEI, Wenhua JIN, Yazhou YUE. Approach for Measuring the Optimal Local Optical Power of Coherent Detection System（Invited）[J]. Acta Photonica Sinica, 2021, 50(10): 1004005
- Acta Photonica Sinica
- Vol. 50, Issue 10, 1004005 (2021)
Fig. 1. The schematic of balance detector
Fig. 2. The curve of SNR with local oscillator optical power and nonlinear coefficient of photodetector
Fig. 3. Schematic of power spectrum of a narrowband signal
Fig. 4. Comparison of SNR calculated by cross-correlation method and spectrum method with theoretical SNR
Fig. 5. Schematic diagram of experimental setup
Fig. 6. Experimental results of three types of balance detectors
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Table 1. Partial parameters of three types of balance detectors
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