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Proceedings Paper

High-resolution optical fiber heterodyne interferometer for measuring displacement
Author(s): Yang Zhao; Jia Wang; Mang Cao; Dacheng Li
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Paper Abstract

Many Methods have been developed to .easure displace.ent with high accuracy, for exap1e, with a dual frequency laser interferometer (AC interferometer) and an classic interferoseter (DC interferoeter) which use a stabilized laser and fringe counter, and an AC interfero.eter has ore advantage over the DC one. An AC interfero.eter with a Zee.an laser can get a high resolution, in the order of nanoMeters, but its resolution extension liRited by nonlinear relation between phase and displace.ent which caused by the two-frequency coRponents in interferoaeter[1]. Because the fundaaental length scale of the interferometer is the wavelength of the light source in the air. The accuracy of an interferoeter is li.ited by the operating envireaent, teRperature, husidity, pressure, etc. because the aiRs of interferoseters expose in the air. A high resolution optical fiber heterodyne interfermeter is described in the paper.

Paper Details

Date Published: 1 July 1990
PDF: 1 pages
Proc. SPIE 1319, Optics in Complex Systems, (1 July 1990); doi: 10.1117/12.22259
Show Author Affiliations
Yang Zhao, Tsinghua Univ. (China)
Jia Wang, Tsinghua Univ. (China)
Mang Cao, Tsinghua Univ. (China)
Dacheng Li, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 1319:
Optics in Complex Systems

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