Abstract

An electrostriction-free continuous-wave measurement technique for the nonlinear index in telecommunication fibers, based on nonlinear-polarization evolution, is presented. Nonlinear birefringence induced in a fiber by cross-phase modulation from a pump beam determines the polarization-state evolution in a probe beam coming from the same source. Determination of the n2 refractive index from the nonlinear-polarization evolution allows an electrostriction-free n2 measurement, while the use of the same source for pump and probe beams avoids averaging effects caused by chromatic and polarization dispersion in long fibers.

© 2002 Optical Society of America

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