Measurement of absolute displacement by a double-modulation technique based on a Michelson interferometer

Lih Wuu Chang; Pie Yau Chien; Ching Ting Lee

doi:10.1364/AO.38.002843

Measurement of absolute displacement by a double-modulation technique based on a Michelson interferometer

Lih Wuu Chang, Pie Yau Chien, Ching Ting Lee

Department of Photonics

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

A novel method is presented for of measuring absolute displacement with a synthesized wavelength interferometer. The optical phase of the interferometer is simultaneously modulated with a frequencymodulated laser diode and optical path-length difference. The error signal originating from the intensity modulation of the source is eliminated by a signal processing circuit. In addition, a lock-in technique is used to demodulate the envelope of the interferometric signal. The displacement signal is derived by the self-mixing technique.

Original language	English
Pages (from-to)	2843-2847
Number of pages	5
Journal	Applied optics
Volume	38
Issue number	13
DOIs	https://doi.org/10.1364/AO.38.002843
Publication status	Published - 1999 May 1

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

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10.1364/AO.38.002843

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abstract = "A novel method is presented for of measuring absolute displacement with a synthesized wavelength interferometer. The optical phase of the interferometer is simultaneously modulated with a frequencymodulated laser diode and optical path-length difference. The error signal originating from the intensity modulation of the source is eliminated by a signal processing circuit. In addition, a lock-in technique is used to demodulate the envelope of the interferometric signal. The displacement signal is derived by the self-mixing technique.",

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AB - A novel method is presented for of measuring absolute displacement with a synthesized wavelength interferometer. The optical phase of the interferometer is simultaneously modulated with a frequencymodulated laser diode and optical path-length difference. The error signal originating from the intensity modulation of the source is eliminated by a signal processing circuit. In addition, a lock-in technique is used to demodulate the envelope of the interferometric signal. The displacement signal is derived by the self-mixing technique.

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Measurement of absolute displacement by a double-modulation technique based on a Michelson interferometer

Abstract

All Science Journal Classification (ASJC) codes

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