Fiber & ElectroOptics Research Center (FEORC)

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Browsing Fiber & ElectroOptics Research Center (FEORC) by Subject "Fiber optics"

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    Investigation And Application Of The Frustrated-Total-Internal-Reflection Phenomenon in Optical Fibers
    Rahnavardy, K.; Arya, Vivek; Wang, A.; Weiss, J. M. (Optical Society of America, 1997-12-01)
    A detailed investigation of the frustrated-total-internal-reflection (FTIR) phenomenon in silica-glass-based optical fibers and its application to simple intensity-modulated strain and pressure sensors is presented. Such sensors may be readily fabricated with silica-based fibers and can be easily modified with sapphire fibers for high-temperature industrial applications where conventional silica-based fiber sensors are not feasible. We present the all-fiber FTIR sensor and show good correlation between theory and experiment. We also present results for the design and implementation of a prototype FTIR-based fiber pressure sensor. (C) 1997 Optical Society of America.
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    Microbend loss fiber optic direction and amplitude sensors for underwater applications
    Vengsarkar, Ashish M.; Murphy, Kent A.; Tran, Tuan A.; Claus, Richard O. (Acoustical Society of America, 1990-07-01)
    Dual purpose fiber optic microbend loss sensors have been developed for measurement of underwater acousticwave amplitudes and for detection of the direction of wave propagation. Three different construction schemes for cylindrical sensing elements are considered. The dual purpose hydrophones have been characterized for frequencies ranging from 15 to 75 kHz. They exhibit sensitivities in the range of -175 to -200 dB r e:1 V/uPa and directionality sensitivity limited by geometrical construction. 1990 Acoustical Society of America