Observation of photoexcited emission clusters in the bulk of KDP and laser conditioning under 355-nm irradiation

Stavros G. Demos; Michael C. Staggs; Ming Yan; Harry B. Radousky; James J. De Yoreo

doi:10.1117/12.344402

7 April 1999 Observation of photoexcited emission clusters in the bulk of KDP and laser conditioning under 355-nm irradiation

Stavros G. Demos, Michael C. Staggs, Ming Yan, Harry B. Radousky, James J. De Yoreo

Author Affiliations +

Proceedings Volume 3578, Laser-Induced Damage in Optical Materials: 1998; (1999) https://doi.org/10.1117/12.344402
Event: Laser-Induced Damage in Optical Materials: 1998, 1998, Boulder, CO, United States

Abstract

Defect clusters in the bulk of large KDP crystals are revealed using a microscopic fluorescence imaging system and CW laser illumination. Exposure of the crystal to high power 355-nm, 3-ns laser irradiation leads to a significant reduction of the number of observed optically active centers. The initially observed defect cluster concentration is approximately 10⁴-10⁶ per mm³ depending on the crystal growth method and sector of the crystal. The number of defect clusters can be reduced by a factor of 10² or more under exposure to 355-nm laser irradiation while their average intensities also decreases. Spectroscopic measurements provide information on the electronic structure of the defects.

Citation Download Citation

Stavros G. Demos, Michael C. Staggs, Ming Yan, Harry B. Radousky, and James J. De Yoreo "Observation of photoexcited emission clusters in the bulk of KDP and laser conditioning under 355-nm irradiation", Proc. SPIE 3578, Laser-Induced Damage in Optical Materials: 1998, (7 April 1999); https://doi.org/10.1117/12.344402

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