Damage mechanisms for KTiOPO4 crystals under irradiation of a cw argon laser

Xiaodong Mu; Yujie J. Ding; Jiyang Wang; Yaogang Liu; Jingqian Wei; Jacob B. Khurgin

doi:10.1117/12.349238

26 May 1999 Damage mechanisms for KTiOPO₄ crystals under irradiation of a cw argon laser

Xiaodong Mu, Yujie J. Ding, Jiyang Wang, Yaogang Liu, Jingqian Wei, Jacob B. Khurgin

Proceedings Volume 3610, Laser Material Crystal Growth and Nonlinear Materials and Devices; (1999) https://doi.org/10.1117/12.349238
Event: Optoelectronics '99 - Integrated Optoelectronic Devices, 1999, San Jose, CA, United States

Abstract

We have developed a simple method for measuring damage threshold of KTP crystal for CW irradiation using an Argon laser. The experimental results show that there are two types of optical damage in KTP crystal depending on the polarization of the incident laser beam. One type of optical damage corresponds to gray tracks that will be formed when the polarization is perpendicular to the z-axis. Another one is invisible damage that will be formed when the polarization is parallel to the z-axis. In addition, we also observed photorefractive two-wave mixing in KTP crystal under each of the above two polarization states. Our experimental results imply that there exists charge drift during the process of optical damage at both of these polarization states, but the mechanisms are different at these two orthogonal polarization states. After analyses, we believe the first type of damage is due to the formation of Ti³⁺ centers and the second one is due to the drift of K⁺ ions.

Citation Download Citation

Xiaodong Mu, Yujie J. Ding, Jiyang Wang, Yaogang Liu, Jingqian Wei, and Jacob B. Khurgin "Damage mechanisms for KTiOPO₄ crystals under irradiation of a cw argon laser", Proc. SPIE 3610, Laser Material Crystal Growth and Nonlinear Materials and Devices, (26 May 1999); https://doi.org/10.1117/12.349238

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