Strain sensor based on LP01-LP02 intermodal interference in highly birefringent optical fibers

9 March 1994

proceedings article
Published by SPIE-Intl Soc Optical Eng

p. 65-72
https://doi.org/10.1117/12.169951

Abstract

LP₀₁-LP₀₂ intermodal interference in highly birefringent (Hi-Bi) elliptical jacket and bow-tie optical fibers was studied experimentally. The response of the interferometer to strain was measured for different polarization inputs. The experiments are shown to agree with a previous theoretical investigation of LP₀₁-LP₀₂ intermodal polarization interference. The modal distributions of the interfering modes are found to be different in elliptical-core and in bow-tie fibers. Comparison with the LP₀₁-LP₁₁ interferometric response is presented. Optimum detection schemes are suggested to extract maximum information from the strain-modulated sensor signal.

Keywords

OPTICAL FIBERS
POLARIZATION
OPTICAL FIBER
SENSORS
INTERFEROMETERS

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