Temporal intensity contrast ratio enhancement of petawatt level laser pulses based on second harmonic generation

Sergey Mironov; Vladimir Lozhkarev; Vladislav Ginzburg; Ivan Yakovlev; Grigory Luchinin; Efim Khazanov; Alexander Sergeev; Gerard Mourou

doi:10.1117/12.854156

17 May 2010 Temporal intensity contrast ratio enhancement of petawatt level laser pulses based on second harmonic generation

Sergey Mironov, Vladimir Lozhkarev, Vladislav Ginzburg, Ivan Yakovlev, Grigory Luchinin, Efim Khazanov, Alexander Sergeev, Gerard Mourou

Author Affiliations +

Proceedings Volume 7721, Solid State Lasers and Amplifiers IV, and High-Power Lasers; 77211R (2010) https://doi.org/10.1117/12.854156
Event: SPIE Photonics Europe, 2010, Brussels, Belgium

Abstract

Theoretical investigation of second harmonic generation (SHG) of super intense femtosecond radiation demonstrated that temporal Intensity Contrast Ratio (ICR) of output radiation of petawatt level laser complexes can be significantly increased. The cubic polarization effects in the process give possibility of additional pulse compression. We present experimental results of SHG of radiation with average intensity 2TW/cm² in 0.6mm KDP crystal. Theoretical model of linear regime of plane wave instability in mediums with quadratic and cubic nonlinearity is developed and thoroughly discussed. Analysis of small-scale self-focusing suppression methodic is presented. The influence of surface dust to spatial noises generation in SHG process is pointed out.

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Sergey Mironov, Vladimir Lozhkarev, Vladislav Ginzburg, Ivan Yakovlev, Grigory Luchinin, Efim Khazanov, Alexander Sergeev, and Gerard Mourou "Temporal intensity contrast ratio enhancement of petawatt level laser pulses based on second harmonic generation", Proc. SPIE 7721, Solid State Lasers and Amplifiers IV, and High-Power Lasers, 77211R (17 May 2010); https://doi.org/10.1117/12.854156

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