Fiber optic differential interferometer

Author

Yuan, Libo ; Zhou, Limin ; Jin, Wei

Author_Institution

Dept. of Phys., Harbin Eng Univ., China

Volume

49

Issue

4

fYear

2000

fDate

8/1/2000 12:00:00 AM

Firstpage

779

Lastpage

782

Abstract

Based on low-coherence interferometry in standard single-mode fibers, a differential interferometer has been proposed. A twin-reflective mirror demodulator was used in the differential interferometer. This interferometer can be used as a fiber optic sensor to measure the elongation of the fiber or strain substressed on the fiber and has the advantage that it can automatically compensate for temperature-induced variations in the refractive index and thermal expansion of the silica fibers

Keywords

Michelson interferometers; compensation; differential detection; fibre optic sensors; gradient index optics; strain sensors; GRIN lenses; Michelson configuration; automatic compensation; calibration; fiber elongation measurement; fiber optic differential interferometer; fiber optic sensor; low-coherence interferometry; optical path length; refractive index; silica fibers; standard single-mode fibers; strain measurement; temperature-induced variations; thermal expansion; twin-reflective mirror demodulator; Capacitive sensors; Demodulation; Mirrors; Optical fiber sensors; Optical fibers; Optical interferometry; Refractive index; Silicon compounds; Strain measurement; Thermal expansion;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.863924

Filename

863924