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An improved theoretical model of the interaction between multiple femtosecond laser pulses and MgO:LiNbO3 crystals with different doping concentrations has been established based on the classical two-temperature model. The evolutions of electron and lattice temperature with the duration, the repetition frequency and the numbers of multiple femtosecond laser pulses in MgO:LiNbO3 crystals have been...
Crystal materials may be damaged irradiated by high-power femtosecond laser pulse during terahertz radiation generation in optical rectification, limiting the further increase of the intensity and the conversion efficiency of the generated terahertz radiation. It remains a big challenge to predict the damage threshold of crystal materials by femtosecond lasers. In this paper, the interaction mechanism...
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