Folded architecture very high resolution detection systems for fiber optic sensors

W. B. Spillman

doi:10.1117/12.2302254

9 November 2000 Folded architecture very high resolution detection systems for fiber optic sensors

W. B. Spillman

Proceedings Volume 4185, Fourteenth International Conference on Optical Fiber Sensors; 418533 (2000) https://doi.org/10.1117/12.2302254
Event: Fourteenth International Conference on Optical Fiber Sensors, 2000, Venice, Italy

Abstract

There are numerous types of fiber optic sensors and sensor systems that rely on the use of detector arrays to determine sensor output from returned optical signals. Spectrally modulating sensors such as those based on Bragg gratings and Fabry-Perot sensors based on white light interferometry are but two examples. One problem with such systems is often the resolution of the detector array. In this paper, a new technique is presented in which the signal from one or more sensors can be demodulated with high resolution. In the technique, the conventional detection system utilizing a linear detector array is replaced by a rotated 2-D array such as a CCD. This results in a much higher sampling resolution than is obtained via linear sampling due to the "folding" of the detector array elements relative to the linearly varying parameter filter directly in front of the array. A theoretical description of the technique is given and potential application areas are discussed.

Citation Download Citation

W. B. Spillman "Folded architecture very high resolution detection systems for fiber optic sensors", Proc. SPIE 4185, Fourteenth International Conference on Optical Fiber Sensors, 418533 (9 November 2000); https://doi.org/10.1117/12.2302254

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