Measurement of the frequency response of the electrostrictive nonlinearity in optical fibers

Optics Letters
E L Buckland, R W Boyd

Abstract

The electrostrictive contribution to the nonlinear refractive index is investigated by use of frequency-dependent cross-phase modulation with a weak unpolarized cw probe wave and a harmonically modulated pump copropagating in optical fibers. Self-delayed homodyne detection is used to measure the amplitude of the sidebands imposed upon the probe wave as a function of pump intensity for pump modulation frequencies from 10 MHz to 1 GHz. The ratio of the electrostrictive nonlinear coefficient to the cross-phase-modulation Kerr coefficient for unpolarized light is measured to be 1.58:1 for a standard step-index single-mode fiber and 0.41:1 for dispersion-shifted fibers, indicating a larger electrostrictive response in silica fibers than previously expected.

Citations

Aug 7, 2007·Physical Review Letters·Richard S TasgalBoris A Malomed
Dec 19, 2007·Optics Letters·A MelloniM Martinelli
Dec 7, 2007·Optics Letters·E M DianovA S Biriukov
Jun 10, 2005·Optics Letters·Seung Kwan KimJung-Chul Seo

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