Enhanced resolution folded architecture spectral detector for fiber optic sensors

Kenith E. Meissner; Thomas H. Swanson Jr.; William B. Spillman Jr.; Richard O. Claus

doi:10.1117/12.566795

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9 June 2004 Enhanced resolution folded architecture spectral detector for fiber optic sensors

Kenith E. Meissner, Thomas H. Swanson Jr., William B. Spillman Jr., Richard O. Claus

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Proceedings Volume 5502, Second European Workshop on Optical Fibre Sensors; (2004) https://doi.org/10.1117/12.566795
Event: Second European Workshop on Optical Fibre Sensors, 2004, Santander, Spain

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, experimental confirmation of 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 digital camera. 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 its experimental validation is presented.

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Kenith E. Meissner, Thomas H. Swanson Jr., William B. Spillman Jr., and Richard O. Claus "Enhanced resolution folded architecture spectral detector for fiber optic sensors", Proc. SPIE 5502, Second European Workshop on Optical Fibre Sensors, (9 June 2004); https://doi.org/10.1117/12.566795

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