Optical inclinometer based on fibre-taper-modal Michelson interferometer
L. Amaral, O. Frazão, J. L. Santos, INESC Porto - Institute for Systems and Computers Engineering of Porto (Portugal); A. B. Lobo Ribeiro, University Fernando Pessoa (Portugal)
An inclinometer sensor based on optical fibre-taper-modal Michelson interferometer is demonstrated. The magnitude of the tilt (bending angle of the fibre taper interferometer) is obtained by passive interferometric interrogation based on the generation of two quadrature phase-shifted signals from two fibre Bragg gratings. Optical phase-to-rotation sensitivity of 1.13 rad/degree with a 14 mrad/√Hz resolution is achieved.
