Abstract

We report a 30% internal conversion efficiency for the first Stokes pulse in stimulated Raman scattering of femtosecond pulses that are dispersively stretched to 250 ps, obtained by use of an all-solid-state laser system. A transfer of the linear chirp is observed, leading to a Raman pulse duration of 190 fs after recompression. Compressed pulse energies of $80 \mu \mathrm{J}$ at a repetition rate of 1 kHz are obtained, with a potential for an easy increase to more than $150 \mu \mathrm{J}$. The temporal and spectral characteristics of the Raman and pump pulses are calculated, and the results explain the observed transient features in the presence of chirp.

© 2001 Optical Society of America

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