锁定放大器
解调
光学
放大器
干涉测量
正交(天文学)
相位调制
物理
计算机科学
带宽(计算)
相位噪声
电信
频道(广播)
作者
Zihua Zhang,Chengwei Li,Zhen Huang
出处
期刊:Applied Optics
[The Optical Society]
日期:2019-07-30
卷期号:58 (22): 6098-6098
被引量:12
摘要
A new self-mixing interferometry quadrature demodulation method based on a lock-in amplifier technique is proposed. Sinusoidal phase modulation of the beam is obtained by an electro-optic modulator (EOM) in the external cavity. Then the real phase of the external target can be calculated by lock-in amplifier analysis method. In this paper, the validity of the proposed method is confirmed by theoretical analysis and means of simulated signals, and then it is demonstrated by several experimental measurements for target harmonic and arbitrary motion. The results show that the proposed method can get a high-precision measurement, even using a diffusive target.
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