Use of a grating interferometer for the demodulation of white-light interferometric sensors

Hassan Akhouayri; Hugues Giovannini; Serge J. Huard; Michel Lequime

doi:10.1117/12.195538

30 November 1994 Use of a grating interferometer for the demodulation of white-light interferometric sensors

Hassan Akhouayri, Hugues Giovannini, Serge J. Huard, Michel Lequime

Proceedings Volume 2341, Interferometry '94: Interferometric Fiber Sensing; (1994) https://doi.org/10.1117/12.195538
Event: International Conference on Interferometry '94, 1994, Warsaw, Poland

Abstract

In order to demodulate optical fiber interferometric sensors in the coherence multiplexing scheme it is worthwhile using static interferomers. Measurement of a physical parameter is obtained by matching the optical path difference (OPD) of each interferometric sensor with a receiver. An attractive solution consists in using grating interferometer as a demodulator. Indeed, it permits one to record correlation peaks (each one corresponding to a sensor) on a photodiode array, thus making demultiplexing easier. On the other hand, it is possible to record only the peak envelope if the grating interferometer is adjusted in a well defined configuration. In this paper we concern ourselves with the theoretical determination of the conditions needed to simplify calculations and interpretation of the experimental results.

Citation Download Citation

Hassan Akhouayri, Hugues Giovannini, Serge J. Huard, and Michel Lequime "Use of a grating interferometer for the demodulation of white-light interferometric sensors", Proc. SPIE 2341, Interferometry '94: Interferometric Fiber Sensing, (30 November 1994); https://doi.org/10.1117/12.195538

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