Fiber-Optic Inclinometer Based on Taper Michelson Interferometer

A compact fiber-optic inclinometer based on a fiber-taper Michelson interferometric sensor is constructed and demonstrated. The sensor consist of a single symmetrically taper waist of 80 μm distanced 30 mm from the single-mode fiber end-tip right-angled cleaved. The amplitude of the bending angle of...

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Published in:IEEE sensors journal 2011-09, Vol.11 (9), p.1811-1814
Main Authors: Amaral, L. M. N., Frazao, O., Santos, J. L., Lobo Ribeiro, A. B.
Format: Article
Language:English
Subjects:
Cavity resonators
Fiber Bragg gratings
fiber taper
inclinometer
modal sensor
Optical fiber couplers
Optical fiber sensors
Optical interferometry
tilt measurement
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description A compact fiber-optic inclinometer based on a fiber-taper Michelson interferometric sensor is constructed and demonstrated. The sensor consist of a single symmetrically taper waist of 80 μm distanced 30 mm from the single-mode fiber end-tip right-angled cleaved. The amplitude of the bending angle of the fiber taper interferometer is obtained by passive interferometric interrogation based on the generation of two quadrature phase-shifted signals from two fiber Bragg gratings with different resonant wavelengths. Optical phase-to-bending sensitivity of ~ 1.13 rad/degree and a bend angle resolution of ~ 0.014 degree/√ Hz were achieved.
doi_str_mv 10.1109/JSEN.2011.2105264
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subjects Cavity resonators
Fiber Bragg gratings
fiber taper
inclinometer
modal sensor
Optical fiber couplers
Optical fiber sensors
Optical interferometry
tilt measurement
title Fiber-Optic Inclinometer Based on Taper Michelson Interferometer
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