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30 November 1994 Polarization methods for raising the level of an intelligence signal in fiber optical sensors using a single light guide
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Proceedings Volume 2341, Interferometry '94: Interferometric Fiber Sensing; (1994) https://doi.org/10.1117/12.195552
Event: International Conference on Interferometry '94, 1994, Warsaw, Poland
Abstract
The paper describes the means of raising the sensitivity of fiber optical sensors involving single multimode and one-mode light guides. First, this is the use of a polarizational beam splitter which is installed in front of the inlet face of a multimode light guide and which fully transmits the polarized radiation from the source to the light guide and reflects half the power of the depolarized output beam to the photodetector. The scheme allows one to raise the output signal level by more than a factor of two as compared with the traditional scheme. Second, in an ordinary one-mode light guide, it is recommended to place a compensator between a polarizational beam splitter and the light guide face. And third, in the case of the use of a single polarized one-mode light guide the compensator should be replaced by a nonmutual magneto-optical element. It is shown that in the circuits with one-mode light guides one can virtually fully eliminate separation power losses of the output beam.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Victor L. Kolpashchikov, Oleg G. Martynenko, and Michael I. Shribak "Polarization methods for raising the level of an intelligence signal in fiber optical sensors using a single light guide", Proc. SPIE 2341, Interferometry '94: Interferometric Fiber Sensing, (30 November 1994); https://doi.org/10.1117/12.195552
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