Optical scanning fiber dual-interferometer system for measuring a small distance

Tianchu Li; Russell G. May; Anbo Wang; Richard O. Claus

doi:10.1117/12.252154

24 September 1996 Optical scanning fiber dual-interferometer system for measuring a small distance

Tianchu Li, Russell G. May, Anbo Wang, Richard O. Claus

Proceedings Volume 2895, Fiber Optic Sensors V; (1996) https://doi.org/10.1117/12.252154
Event: Photonics China '96, 1996, Beijing, China

Abstract

In this paper we present an optical scanning, fiber dual- extrinsic Fabry-Perot interferometer (DEFPI) system for measuring small distance absolutely. Taking the scanning wavelength as an 'inter-converter' to compare the gap length of the sensing head with a reference length, we may obtain, in practice, a semi-absolute measurement of the sensing head length. The measurement is independent from the wavelength scanning accuracy and the reference cavity length can be self-calibrated simply by changing the sensing length with a known distance.

Citation Download Citation

Tianchu Li, Russell G. May, Anbo Wang, and Richard O. Claus "Optical scanning fiber dual-interferometer system for measuring a small distance", Proc. SPIE 2895, Fiber Optic Sensors V, (24 September 1996); https://doi.org/10.1117/12.252154

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