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Proceedings Paper

Optical fiber superheterodyne interferometer with a two-wavelength HeNe laser for absolute distance inferometry
Author(s): Yang Zhao; Cunman Zhang
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Paper Abstract

The paper proposes an absolute distance interferometry (ADI) system using the technique of heterodyne and superheterodyne detecting. A two wavelengths HeNe 633nm laser is employed to generate a long synthetic wavelength for measuring absolute distance. The characteristics of the heterodyne ADI system using AOMs are analyzed. The optical wave cross talk and poor wave front quality will decrease the performance of the heterodyne ADI system. By using the technique of superheterodyne and optical fiber, the performance of the new ADI system is improved. The common optical path and reference signal picking configuration in the interferometer eliminate the affection of air turbulence and problem form optical fiber effectively.

Paper Details

Date Published: 1 November 1997
PDF: 5 pages
Proc. SPIE 3134, Optical Manufacturing and Testing II, (1 November 1997); doi: 10.1117/12.279135
Show Author Affiliations
Yang Zhao, Tsinghua Univ. (United States)
Cunman Zhang, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 3134:
Optical Manufacturing and Testing II
H. Philip Stahl, Editor(s)

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