Point defects in KTP and their possible role in laser damage

Michael P. Scripsick; Gary J. Edwards; Larry E. Halliburton; Roger F. Belt; Lawrence A. Kappers

doi:10.1117/12.50756

1 December 1991 Point defects in KTP and their possible role in laser damage

Michael P. Scripsick, Gary J. Edwards, Larry E. Halliburton, Roger F. Belt, Lawrence A. Kappers

Proceedings Volume 1561, Inorganic Crystals for Optics, Electro-Optics, and Frequency Conversion; (1991) https://doi.org/10.1117/12.50756
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

Potassium titanyl phosphate (KTiOPO4 or KTP) has applications in nonlinear optics and electro-optics. It is most commonly employed in the second harmonic generation of .530 um light from 1.06 m Nd:YAG laser radiation. However, applications of KTP are limited by optical damage in the form of thin gray tracks produced by high-power, high-repetition-rate laser pulses. It is difficult to obtain samples of KTP with laser-induced gray tracks that are suitable for quantitative measurements. The gray coloration absorbs both the fundamental and second harmonic, and continued operation after the formation of these defects may quickly lead to catastrophic failure. Another complication arises because the gray tracks characteristic of laser damage are not stable at room temperature (they decay in a matter of days). Even if gray-tracked samples were readily available, it is questionable whether the concentration of responsible defects would be sufficient to provide definitive results. These difficulties have led researchers to investigate alternative methods for producing the defects responsible for laser-induced optical damage in KTP.

Citation Download Citation

Michael P. Scripsick, Gary J. Edwards, Larry E. Halliburton, Roger F. Belt, and Lawrence A. Kappers "Point defects in KTP and their possible role in laser damage", Proc. SPIE 1561, Inorganic Crystals for Optics, Electro-Optics, and Frequency Conversion, (1 December 1991); https://doi.org/10.1117/12.50756

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