Demodulation of a fiber Fabry-Perot strain sensor using white light interferometry

Gary Zuliani; W. Dayle Hogg; Kexing Liu; Raymond M. Measures

doi:10.1117/12.50191

1 December 1991 Demodulation of a fiber Fabry-Perot strain sensor using white light interferometry

Gary Zuliani, W. Dayle Hogg, Kexing Liu, Raymond M. Measures

Proceedings Volume 1588, Fiber Optic Smart Structures and Skins IV; (1991) https://doi.org/10.1117/12.50191
Event: OE Fiber, 1991, Boston, MA, United States

Abstract

A method is demonstrated for demodulating the signal from a fiber-optic Fabry-Perot (FFP) strain gauge using white light interferometry. In particular, a Michelson interferometer with an identical path imbalance to the sensing FFP interferometer is used to recombine the sensing and reference components. Far-field interference from the Michelson interferometer, with one tilted mirror, is then projected onto a CCD camera where the fringes can be captured and analyzed on an accompanying microcomputer. The advantages of the system include the absolute measurement capability and the potential for multiprocessing.

Citation Download Citation

Gary Zuliani, W. Dayle Hogg, Kexing Liu, and Raymond M. Measures "Demodulation of a fiber Fabry-Perot strain sensor using white light interferometry", Proc. SPIE 1588, Fiber Optic Smart Structures and Skins IV, (1 December 1991); https://doi.org/10.1117/12.50191

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