Bulk darkening of flux-grown KTiOPO4

David R. Rockafellow; Edward A. Teppo; John C. Jacco

doi:10.1117/12.50758

1 December 1991 Bulk darkening of flux-grown KTiOPO₄

David R. Rockafellow, Edward A. Teppo, John C. Jacco

Proceedings Volume 1561, Inorganic Crystals for Optics, Electro-Optics, and Frequency Conversion; (1991) https://doi.org/10.1117/12.50758
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

A quantitative assessment of the bulk darkening phenomenon for flux-grown KTiOPO₄ (KTP) is reported. Measurements were made for KTP use as a component for second harmonic generation of 1064 nm Nd:YAG operating in a pulsed mode. The results show that bulk darkening severity increases with fluence and exposure time. Irreversible bulk darkening has been observed at laser energies ranging from 8.8 to 18 J/cm2 depending on the shot count. Fluences exceeding 15 J/cm2 can cause catastrophic damage. Data taken at elevated temperatures indicates an improved reliability. The onset of slight bulk darkening revealed no adverse effects on conversion efficiency.

Citation Download Citation

David R. Rockafellow, Edward A. Teppo, and John C. Jacco "Bulk darkening of flux-grown KTiOPO₄", Proc. SPIE 1561, Inorganic Crystals for Optics, Electro-Optics, and Frequency Conversion, (1 December 1991); https://doi.org/10.1117/12.50758

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