Abstract

We demonstrate tunable all-optical pulse compression and stretching via doublet Brillouin gain lines in an optical fiber. Tunable pulse compression or a stretching ratio of 1.47–0.43 accompanying a time delay is achieved by controlling the separation between two gain lines, for an input pulse train with a $40\mathrm{ns}$ width and a repetition rate of $5\mathrm{MHz}$, in a $4\mathrm{km}$ silica fiber with a fixed pump power of $88.1\mathrm{mW}$. The limitation of this pulse compressor or stretcher is also discussed.

© 2009 Optical Society of America

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