30 December 1993 Multiplex architecture for 3 x 3 coupler based fiber optic sensors
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Proceedings Volume 2071, Distributed and Multiplexed Fiber Optic Sensors III; (1993) https://doi.org/10.1117/12.165919
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States
Abstract
This paper presents a frequency division multiplexing (FDM) design that is compatible with 3 X 3 coupler terminated Mach-Zehnder interferometric sensors. Unlike the FDM technique that is presently used with phase generated carrier (PGC) demodulation schemes, this technique does not require modulation of the wavelength of the laser source or the introduction of optical path differences (OPD) in the interferometer in order to generate a phase carrier modulation in the interferometer. The technique described in this paper relies simply on amplitude modulation (AM) of the light intensity and uses the three outputs of an interferometer to unambiguously recover the phase modulation in the interferometer.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Greg J. Reid, Greg J. Reid, David A. Brown, David A. Brown, } "Multiplex architecture for 3 x 3 coupler based fiber optic sensors", Proc. SPIE 2071, Distributed and Multiplexed Fiber Optic Sensors III, (30 December 1993); doi: 10.1117/12.165919; https://doi.org/10.1117/12.165919
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