Abstract

We propose a distributed optical-fiber sensing scheme using four-photon mixing pulse walk-off. We use a copropagating system in which only a pump wave is launched into the fiber. We analyze the performance by including the effects of fiber birefringence, group-velocity dispersion, and self-phase modulation. A short system with high sensitivity and good resolution can be built. The useful operating length is limited by self-phase-modulation-induced pulse broadening.

© 1995 Optical Society of America

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