Abstract

This paper describes a method for measuring the transfer function and impulse response of a single-fiber interferometric sensor. A change in phase retardation is extracted directly from a beat photocurrent generated by superimposing the orthogonally polarized optical waves of different frequency propagating along the slow and fast axes of the fiber. Axial vibrations with a known Gaussian spectrum given to the fiber enable us to measure the transfer function and impulse response in the linear frequency range of the overall sensing system.

© 1991 Optical Society of America

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