Fiber-Optic Inclinometer Based on Taper Michelson Interferometer

Amaral, L. M. N.; Frazao, O.; Santos, J. L.; Lobo Ribeiro, Antonio B.

http://hdl.handle.net/10284/7862

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Authors

Amaral, L. M. N.

Frazao, O.

Santos, J. L.

Lobo Ribeiro, Antonio B.

Abstract(s)

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 micron 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 ~0.014degree/Hz^1/2 were achieved.