High-reliable self-calibrated signal processing method for interferometric fiber optic sensors

Sergey A. Egorov; Anatoly N. Mamaev; Igor G. Likhachiev

doi:10.1117/12.229231

3 January 1996 Highly reliable self-calibrated signal processing method for interferometric fiber optic sensors

Sergey A. Egorov, Anatoly N. Mamaev, Igor G. Likhachiev

Proceedings Volume 2594, Self-Calibrated Intelligent Optical Sensors and Systems; (1996) https://doi.org/10.1117/12.229231
Event: Photonics East '95, 1995, Philadelphia, PA, United States

Abstract

The new method for straightforward spectral signal processing in interferometric fiber-optic sensors is presented. Its main idea is to analyze the output spectrum of sensing interferometer and separate it from different noise sources in the domain of Fourier images. The absolute and accurate value of OPD can be found directly from the spectral dependence of the analytical signal of interferometer's output signal. The technique doesn't suffer from power and spectral fluctuations of LED and sufficiently noise resistant. It is also insensitive to the influence of parasitic interferometers appearing in the optical connectors and other parts of the sensor. Devices based on such principles don't need recalibration after switching on and further operation. The method has a good potential for combining sensors in a network.

Citation Download Citation

Sergey A. Egorov, Anatoly N. Mamaev, and Igor G. Likhachiev "Highly reliable self-calibrated signal processing method for interferometric fiber optic sensors", Proc. SPIE 2594, Self-Calibrated Intelligent Optical Sensors and Systems, (3 January 1996); https://doi.org/10.1117/12.229231

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