Abstract
Stimulated Raman scattering (SRS) is a commonly used technique for generating high-peak-power laser pulses in the near-IR and UV spectral regions from doubled Nd:YAG or tunable dye laser systems, which produce output pulse lengths of the order of 10 ns. There is currently much interest in investigating ultrafast nonlinear optical phenomena with pulse lengths of the order of a few picoseconds or less. Many interesting materials have nonabsorbing spectral windows that are incompatible with existing high-peak-power picosecond laser systems. Consequently, we investigated the possibility of employing SRS to shift the wavelengths of existing short-pulse lasers, where the Raman process is well within the transient regime. Transient Raman scattering has been used extensively to study ultrafast vibrational dynamics in gas molecules, liquids, and solids.1-3 That work, however, has concentrated on the unsaturated case, characterized by low conversion and a nondeplet- ed pump. The operating conditions and ultimate conversion efficiency in the saturated regime are not known.
© 1986 Optical Society of America
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