Abstract

We report generation of millijoule-level Stokes (873, $961\mathrm{nm}$) and anti-Stokes (738, 685, $639\mathrm{nm}$) sidebands of $800\mathrm{nm}$ terawatt pulses by inserting a multistage $\mathrm{Ba}{\left(\mathrm{N}{\mathrm{O}}_3\right)}_2$ Raman shifter-amplifier into a conventional Ti:sapphire chirped-pulse amplification system. The Raman subsystem requires no additional pump lasers and does not compromise the energy, duration, or beam quality of the main $800\mathrm{nm}$ pulses. The chirped first Stokes $\left(870\mathrm{nm}\right)$ beam is compressed to transform limit $(\sim 100\mathrm{fs})$ with several millijoules of energy and has high beam quality and is free of filamentation. Synchronized $800\mathrm{nm}$ and Raman sideband pulses are useful for a variety of two-color, high-intensity laser experiments.

© 2008 Optical Society of America

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