Abstract
We report laser-induced damage threshold (LIDT) measurements of periodically poled lithium niobate (PPLN) and magnesium-oxide-doped PPLN (MgO:PPLN) in the femtosecond pulse duration regime at 1030 nm with 100 kHz and 75 MHz repetition rate. PPLN and MgO:PPLN crystals with broadband Nb<sub>2</sub>O<sub>5</sub>/SiO<sub>2</sub> AR coatings for 1.4 - 1.8 um spectral range were used. S-on-1 test for LIDT measurements were performed. S was equal to 10<sup>6</sup> and 4.56*10<sup>10</sup> pulses for 100 kHz CPA laser system and 75 MHz oscillator, respectively. Evaluated LIDT was 20 mJ/cm<sup>2</sup> for 290 fs pulses at 100 kHz repetition rate and 0.63 mJ/cm<sup>2</sup> for 105 fs pulses at 76 MHz repetition rate.
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