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
J. Zhang, V. A. Handerek, and A. J. Rogers, "Distributed optical-fiber sensing by four-photon mixing pulse walk-off," Opt. Lett. 20, 794-796 (1995)