13 November 2017 Kinetic model of optical damage in transparent crystals under continuous-wave laser irradiation
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Abstract
LiNbO3 and LiTaO3 are frequently used in second harmonic conversion of continuous-wave light from the infrared to the visible regions. Optical damage of LiNbO3-type crystals is a crucial issue in the high-average-power laser systems. The optical damage by a light-induced heating is investigated. We have proposed a light-induced heating by the accumulated long-lived states like polarons or self-trapped excitons. In addition to the long-lived states, point defects as color centers are created by a radiation. A new model includes these states. As a results, it is shown that a creating rate of the color center becomes a important parameter on the determination of critical power.
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Susumu Kato, Susumu Kato, Atsushi Sunahara, Atsushi Sunahara, Sunao Kurimura, Sunao Kurimura, "Kinetic model of optical damage in transparent crystals under continuous-wave laser irradiation ", Proc. SPIE 10447, Laser-Induced Damage in Optical Materials 2017, 104471Z (13 November 2017); doi: 10.1117/12.2279957; https://doi.org/10.1117/12.2279957
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