Abstract

We report a pump–probe cross-phase-modulation experiment in a single-mode optical fiber in which the probe spectrum is shifted by an amount comparable with its spectral width under the influence of a 250-pJ pump pulse. The pulses are 210 fs FWHM and are generated by the reshaping of the pulses of a femtosecond Ti:sapphire laser. The dependence of the wavelength shift on the pump–probe delay time is investigated, and the results are found to be in good agreement with numerical simulations. Application to all-optical femtosecond switching is discussed.

© 1994 Optical Society of America

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