High Power Hybrid Femtosecond Laser Systems
نویسنده
چکیده
Hybrid femtosecond lasers combine the chirped pulse amplification (CPA) in laser media with optical parametric chirped pulsed amplification (OPCPA) in nonlinear crystals. A key feature of these systems consists in matching the parametric amplification gain bandwidth of nonlinear crystals to the spectral gain bandwidth of laser amplifying crystals. Gain bandwidths as broad as 150 nm can be obtained by noncollinear OPCPA in BBO, LBO, and DKDP crystals. The ultrabroad gain bandwidth of BBO crystals and the amplification bandwidth of Ti:sapphire laser crystals are overlapped. OPCPA in BBO crystals up to mJ energy level in the laser Front-End, followed by CPA in Ti:sapphire crystals up to ten/hundred Joules, represents an advanced solution for PW-class femtosecond lasers. The configuration and output beam characteristics of the hybrid amplification 2 × 10 PW ELI-NP laser are described.
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