Optical fiber superheterodyne interferometer with a two-wavelength HeNe laser for absolute distance inferometry

Yang Zhao; Cunman Zhang

doi:10.1117/12.279135

1 November 1997 Optical fiber superheterodyne interferometer with a two-wavelength HeNe laser for absolute distance inferometry

Yang Zhao, Cunman Zhang

Author Affiliations +

Proceedings Volume 3134, Optical Manufacturing and Testing II; (1997) https://doi.org/10.1117/12.279135
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

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.

Citation Download Citation

Yang Zhao and Cunman Zhang "Optical fiber superheterodyne interferometer with a two-wavelength HeNe laser for absolute distance inferometry", Proc. SPIE 3134, Optical Manufacturing and Testing II, (1 November 1997); https://doi.org/10.1117/12.279135

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