Abstract
In this paper, heat accumulation effect of MgO: LN crystal irradiated by femtosecond pulses was analyzed by a developed thermal conduction model in terms of the spatial and temporal distribution of the absorbed laser energy. Using the focused femtosecond pulses about 61 fs at 1040nm with a repetition rate of 52MHz, ablation morphologies under different exposure time and average power were obtained experimentally. The measured laser-induced damage threshold of X-, Y- and Z-cut MgO: LN crystals are 0.82mJ/cm2, 0.74mJ/cm2 and 0.76mJ/cm2, respectively, and based on the measurement achieved in the Lab the differences in the ablation morphologies were analyzed in detail.
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