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Report No.

High-energy, spatially flat-top green pump laser by beam homogenization for petawatt scale Ti:sapphire laser systems

Tanaka, Momoko; Kiriyama, Hiromitsu; Ochi, Yoshihiro; Nakai, Yoshiki; Sasao, Hajime; Okada, Hajime; Daido, Hiroyuki; Bolton, P.; Kawanishi, Shunichi

We have demonstrated that we can homogenize the spatial profile of a high-energy green laser pulse used for pumping a petawatt scale Ti:sapphire amplifier. The second harmonic of a high-energy, large-aperture Nd:glass laser system generates laser emission at a green wavelength with 75 J single pulse energy. Using a diffractive optical element for beam homogenization, we have obtained a highly spatially uniform flat-top second harmonic profile.



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