Abstract

A method for storing optical data pulse sequences, frequency shifted with respect to the original data pulse frequency, is theoretically described and experimentally demonstrated. Data pulses are converted into long-living acoustic waves via stimulated Brillouin scattering in optical fiber by counterpropagating write pulses of one frequency, and later they are retrieved by read pulses at a different frequency giving rise to frequency-shifted stored pulses. The shifted frequency is governed by the phase-matching condition between the read pulse and the acoustic wave, which can be satisfied using birefringent fibers. The converted frequency is ±52GHz and is tuned by applying strain to the fiber with a slope coefficient of ±1.8MHzμε, and conversion efficiency can be as high as 13% for the storage time of 825ns.

© 2008 Optical Society of America

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