Fanhua Xia, Huipeng Wang, Wei Xia, Hui Hao, Dongmei Guo, Ming Wang. Self-Mixing Interference Displacement Measurement Based on Vertical-Cavity Surface-Emitting Laser Junction Voltage[J]. Laser & Optoelectronics Progress, 2020, 57(23): 231203
- Laser & Optoelectronics Progress
- Vol. 57, Issue 23, 231203 (2020)
Fig. 1. Simulation of self-mixing interference signals under various feedback levels
Fig. 2. Structure diagram of TO packaged VCSEL with photodiode integrated
Fig. 3. Experimental device for displacement measurement of photodiode photocurrent and laser diode junction voltage
Fig. 4. Image of self-mixing interference signals of integrated photodiode photocurrent and laser diode junction voltage with low signal-to-noise ratio
Fig. 5. Comparison of signal-to-noise ratio of self-mixing interference signals under different bias current levels
Fig. 6. Comparison of self-mixing interference signals of integrated photodiode and laser diode junction voltage in displacement experiment. (a)2.5 μm; (b) 5.0 μm
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Table 1. Measurement results of displacement experiment
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