Measurement of the nonlinear refractive index in optical fiber by the cross-phase-modulation method with depolarized pump light

Abstract

Depolarized pump light is used in measurements of the nonlinear refractive index, n₂, in optical fiber by the cross-phase-modulation method. High measurement repeatability within ±1% is obtained by this method. The nonlinear refractive index is determined for dispersion-shifted fiber, standard single-mode fiber, pure silica-core single-mode fiber, and dispersion-compensating fiber as 3.35 × 10⁻²⁰, 2.96 × 10⁻²⁰, 2.79 × 10⁻²⁰, and 4.44 × 10⁻²⁰ m²/W, respectively, at 1.55 μm. This shows that the nonlinear refractive indices of the optical fibers differ greatly according to glass composition.

© 1995 Optical Society of America

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