Vol. 25, issue 03, article # 15

Frolov S.A., Trunov V.I., Pestryakov E.V., Kirpichnikov A.V., Petrov V.V. Optimization of OPCPA cascades of petawatt few-cycle laser system based on BBO and LBO crystals. // Optika Atmosfery i Okeana. 2012. V. 25. No. 03. P. 278-284 [in Russian].
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Abstract:

Influence of linear and nonlinear phase effects on the process of OPCPA of few-cycle femtosecond pulses in BBO and LBO crystals with picosecond pump is investigated. Such effects include diffraction, which determines beam divergence, walk-off due to birefringence, self and cross phase modulation and small-scale self-focusing. In order to generate amplified pulses with stable spatiotemporal parameters, which permit the realization of coherent summation in multi-channel laser system, the requirements for spatial parameters and inhomogeneities of input beams for each cascade of high power few-cycle laser system, which is being developed in ILP SB RAS, were determined.

Keywords:

petawatt laser system, OPCPA, femtosecond pulses, small-scale self-focusing, LBO

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