Abstract

We report on the interrogation of a lead-insensitive dual-mode fiber sensor using a white-light interferometric technique with a multimode laser-diode source. An elliptical-core dual-mode fiber acts as a remote-sensing interferometer, and a second dual-mode fiber acts as a receiver interferometer. We establish the sensor design for optimized performance and demonstrate the capability of accurate detection of periodic strain signals in the presence of, e.g., temperature-induced low-frequency phase drifts.

© 1992 Optical Society of America

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