Abstract

ABSTRACT The search for an efficient solid state laser with tunable emission in the ultraviolet wavelengthregion has resulted in the growth and development ofcerium doped colquiriite ciystals, such asLiCaAJF6 (LiCAF) and LiSrA1F6 (LiSAF). Results from preliminary research at LawrenceLivermore National Laboratoiy indicate that Ce:LiSAF is the preferred material ofthe colquiriitehosts, since it shows higher gains than Ce:LiCAF. Although the growth ofchromium dopedLiSAF has been developed to produce long boules ofnear-scatter-free material, the doping ofLiSAF with cerium introduces different variables into the growth ofhigh optical quality crystals.The main crystal growth issue for Ce:LiSAF is the charge compensation mandated by thesubstitution ofthe trivalent cerium ion for divalent strontium, which is located in the only sitelarge enough to support the cerium ion. Initial growth runs produced opaque, heavily crackedcrystals with less than 1 0 mm of cleaner, single crystal materiaL The addition of chargecompensating ions into the starting charge and their effect in attaining higher doped and less-stressed material is discussed. The selection ofgrowth parameters needed to produce higher-doped, near-scatter-free Ce:LiSAF will also be described.Keywords: ultraviolet, solid-state laser, tunable, cerium, colquiriite, crystal growth

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