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Nonlinear absorption of non-chain HF laser radiation in germanium |
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| Authors: | E. E. Alekseev K. N. Firsov S. Yu. Kazantsev I. G. Kononov V. E. Rogalin |
| Affiliation: | 1.National Research Center “Kurchatov Institute”,Moscow,Russia;2.Prokhorov General Physics Institute,Russian Academy of Sciences,Moscow,Russia;3.National Research Nuclear University MEPhI (Moscow Engineering Physics Institute),Moscow,Russia;4.“Astrophysika National Laser Centre” OJSC,Moscow,Russia;5.Tver State University,Tver,Russia |
| Abstract: | The transmission of high-power HF(DF) laser radiation through Ge single crystals of different quality has been experimentally and numerically investigated. Based on the experimental data for the lasing spectrum, the two-photon absorption coefficient in Ge is estimated to be K2 =55±10 cmGW?1 at λ=2.8μm. The transmission dynamics of high-power radiation with λ=2.6?3 μm through germanium crystals is numerically simulated. |
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