High-accuracy sinusoidal phase-modulating self-mixing interferometer using an electro-optic modulator: development and evaluation

• DOI: 10.1364/ao.52.000b52
• Publication Date: 2013-01-18T17:27:06Z
• Authors: Wei Xia; Ming Wang; Zhenyu Yang; Wenhua Guo; Hui Hao; Dongmei Guo
• Keywords: Interferometric visibility; SIGNAL (programming language); Intensity interferometer

A sinusoidal phase-modulating He-Ne laser subject to weak optical feedback has been used develop an interferometer that is capable of performing real-time displacement measurement with nanometer accuracy. The principle and the signal processing method are introduced. commercial dual-frequency included in both small large ranges evaluate performance developed interferometer. Experimental results show average errors standard deviations good agreement data obtained from resolution multiple effect discussed detail. These development reasonable feasible.