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10 June 2004 Investigation of bulk laser damage and absorption of laser light in CsLiB6O10 crystals (Abstract Only)
Tomosumi Kamimura, Masashi Yamamoto, Shigenori Akamatsu, Muneyuki Nishioka, Masashi Yoshimura, Yusuke Mori, Takatomo Sasaki, Kunio Yoshida
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Proceedings Volume 5273, Laser-Induced Damage in Optical Materials: 2003; (2004) https://doi.org/10.1117/12.524643
Event: XXXV Annual Symposium on Optical Materials for High Power Lasers: Boulder Damage Symposium, 2003, Boulder, Colorado, United States
Abstract
High-power solid-state ultraviolet (UV) lasers by using a have been in high demand because of their convenient operation procedure. An effective technique for UV generation is cascaded sum-frequency generation pumped by the output of near-IR solids-state lasers. The performance of such solid-state UV lasers appears to depend on the ability and reliability of nonlinear optical (NLO) crystals that are employed for laser frequency conversion. Discovery of CsLiB6O10(CLBO) crystals have enabled the production of such practical high-power all solid-state UV lasers. In 2001, UV output power up to 23.0 W by fourth harmonic generation of Nd:YAG laser was achieved. It is fact that laser-induced damage of NLO crystal is a limiting factor on reliable operation of high-power solid-state UV lasers. Bulk laser-induced damage of NLO crystal is related to the crystal's quality. In this paper, we have investigated the relationship among the bulk laser-induced damage threshold (LIDT), dislocation density and absorption of laser light in CLBO crystals with various crystallinity. The bulk LIDT of CLBO increased with decreasing dislocation density. High-quality crystals with a higher LIDT (15 - 18 GW/cm2) have a lower dislocation density of 6.6 x 103/cm2 than that of conventional CLBO (~15.0 x 103/cm2). The relationships between crystal quality and absorption of laser light will be presented.
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Tomosumi Kamimura, Masashi Yamamoto, Shigenori Akamatsu, Muneyuki Nishioka, Masashi Yoshimura, Yusuke Mori, Takatomo Sasaki, and Kunio Yoshida "Investigation of bulk laser damage and absorption of laser light in CsLiB6O10 crystals (Abstract Only)", Proc. SPIE 5273, Laser-Induced Damage in Optical Materials: 2003, (10 June 2004); https://doi.org/10.1117/12.524643
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KEYWORDS
Crystals
Laser crystals
Ultraviolet radiation
Absorption
Nonlinear crystals
Solid state lasers
Laser induced damage
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