Title :
Displacement Estimation Based on Phase Unwrapping Technique in Optical Self-mixing System
Author :
Yu-yan, Zhang ; Ming-yue, Zheng ; Hu Wei ; Meng-han, Chen
Author_Institution :
Key Lab. of Meas. Technol. & Instrum. of Hebei Province, Yanshan Univ., Qinhuangdao, China
Abstract :
The optical feedback self-mixing model is theoretical analyzed and numerical simulated when the external cavity of a semiconductor laser suffers a harmonic vibration, a micro-displacement measurement system is set up based on self-mixing effect. A method based on phase unwrapping is introduced to process the self-mixing power signal, which has a good reconstruction effect for different feedback level when the self-mixing signal suffers no noise and interference, and the maximum measurable amplitude error is 28nm peak to peak.
Keywords :
displacement measurement; laser cavity resonators; laser feedback; measurement by laser beam; semiconductor lasers; amplitude error 1; displacement estimation; external cavity; feedback level; harmonic vibration; micro-displacement measurement system; optical self-mixing system; phase unwrapping; reconstruction effect; self-mixing power signal; semiconductor laser; Cavity resonators; Laser feedback; Laser modes; Optical feedback; Optical interferometry; Optical reflection; Semiconductor lasers; Displacement reconstruction; Optical feedback; Phase unwrapping; Self-mixing interference;
Conference_Titel :
Instrumentation, Measurement, Computer, Communication and Control, 2011 First International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-0-7695-4519-6
DOI :
10.1109/IMCCC.2011.49
