Pump channel of parametric amplifier of terawatt femtosecond Yb laser system
V.V. Petrov1, E.V. Pestryakov1, A.V. Laptev1, V.A. Petrov1,2, G.V. Kuptsov1,2
1Institute of Laser Physics of the Siberian Branch of the RAS, 630090, Novosibirsk, 13/3, Ac. Lavrentieva ave
2Novosibirsk State Technical University, 630092, Novosibirsk, 20, Prospekt K. Marksa
Keywords: femtosecond pulses, cryogenic temperature, laser diode pumping, multipass amplifier, stretcher-compressor
Abstract
In this paper, we have presented some components of a designed terawatt femtosecond laser system with the repetition rate 1 kHz. The system consists of pump and amplification channels which are optically synchronized. The amplification and pump channels are based on parametric amplification in LBO crystal and diode-pumped Yb3+-doped laser media at 77 K, respectively. In the pump channel pulses of picoseconds duration are generated. These pulses pump the non-linear crystal of the parametric amplifier. The system is based on the chirped-pulse amplification technique. For the pump channel, parameters and alignments of the holographic gratings-based stretcher compressor system are determined. The Yb:Y2O3 ceramics multipass amplifier operating at 77 °K diode-pumped by 1 kW was developed. The data can be used in the development of cryogenic multistage femtosecond laser systems working with high a repetition rate in the kilohertz regime.
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