Quadrature demodulation based on lock-in amplifier technique for self-mixing interferometry displacement sensor.

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.

[1]  Chunlei Jiang,et al.  Modeling and experimental verification of laser self-mixing interference phenomenon with the structure of two-external-cavity feedback , 2018 .

[2]  U. Zabit,et al.  Adaptive Transition Detection Algorithm for a Self-Mixing Displacement Sensor , 2009, IEEE Sensors Journal.

[3]  Chengwei Li,et al.  Self-mixing interference signal analysis based on Fourier transform method for vibration measurement , 2013 .

[4]  Thomas Taimre,et al.  Coherent imaging using laser feedback interferometry with pulsed-mode terahertz quantum cascade lasers. , 2019, Optics express.

[5]  Wei Xia,et al.  Semiconductor laser self-mixing micro-vibration measuring technology based on Hilbert transform , 2016 .

[6]  Dongmei Guo,et al.  Self-mixing interferometry based on a double-modulation technique for absolute distance measurement. , 2007, Applied optics.

[7]  Benli Yu,et al.  Self-mixing interference measurement system of a fiber ring laser with ultra-narrow linewidth. , 2012, Optics express.

[8]  B. Houchmandzadeh,et al.  Nonlinear modification of the laser noise power spectrum induced by frequency-shifted optical feedback , 2016, 1609.09768.

[9]  Dongmei Guo.  Quadrature demodulation technique for self-mixing interferometry displacement sensor , 2011 .

[11]  D. Guo,et al.  Self-mixing interferometer based on sinusoidal phase modulating technique. , 2005, Optics express.

[12]  E. Linfield,et al.  Multi-spectral terahertz sensing: proposal for a coupled-cavity quantum cascade laser based optical feedback interferometer. , 2017, Optics express.

[13]  Olivier Jacquin,et al.  Ultrasound vibration measurements based on laser optical feedback imaging. , 2018, Applied optics.

[14]  Thomas Taimre,et al.  On the feasibility of self-mixing interferometer sensing for detection of the surface electrocardiographic signal using a customized electro-optic phase modulator. , 2013, Physiological measurement.

[15]  Chunlei Jiang,et al.  Multiple self-mixing interferometry algorithm based on phase modulation for vibration measurement , 2017 .

[16]  Caroline Bes,et al.  Displacement measurements using a self-mixing laser diode under moderate feedback , 2006, IEEE Transactions on Instrumentation and Measurement.

[17]  Shuxin Yin,et al.  Multiple self-mixing interference based on phase modulation and demodulation for vibration measurement. , 2017, Applied optics.

[18]  Chengwei Li,et al.  Improved transition detection algorithm for a self-mixing displacement sensor , 2016 .

[19]  Control of the differential interference contrast in reinjected bimode laser. , 2015, Applied optics.

[20]  Jiangtao Xi,et al.  Dynamic stability analysis for a self-mixing interferometry system. , 2014, Optics express.

[21]  Ming Wang.  Fourier transform method for self-mixing interference signal analysis , 2001 .

[22]  S. Donati.  Developing self‐mixing interferometry for instrumentation and measurements , 2012 .

[23]  É. Lacot,et al.  Nonlinear laser dynamics induced by frequency shifted optical feedback: application to vibration measurements. , 2016, Applied optics.

[24]  Julien Perchoux,et al.  Solving self-mixing equations for arbitrary feedback levels: a concise algorithm. , 2014, Applied optics.

[25]  É. Lacot,et al.  Laser relaxation-oscillation frequency imaging. , 2001, Optics letters.

[26]  Goebel,et al.  Intermittency in the coherence collapse of a semiconductor laser with external feedback. , 1989, Physical review letters.

[27]  Chunlei Jiang,et al.  Vibration measurement based on Multiple Self-Mixing Interferometry , 2016 .