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Simple interrogator for optical fiber-based white light Fabry–Perot interferometers

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Abstract

In this Letter, we present the design of a simple signal interrogator for optical fiber-based white light Fabry–Perot (F-P) interferometers. With the hardware being composed of only a flat fused silica wafer and a CCD camera, this interrogator translates the spectral interference into a spatial interference pattern, and then demodulates the F-P cavity length with the use of a relatively simple demodulation algorithm. The concept is demonstrated experimentally in a fiber optic sensor with a sapphire wafer as the F-P cavity.

© 2017 Optical Society of America

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