It has been demonstrated in a series of recent articles that the new crystal, LiCaAlF6: Cr3+, (known as Cr:LiCAF), holds substantial promise as a practical laser material.1-3 The laser output is tunable from 720-840 nm, and the Cr3+ ion exhibits two broad absorption bands in the visible range, thereby permitting the efficient absorption of flashlamp light. In this paper we report measurements of the thermal and thermo-optical properties of Cr:LiCAF that are relevant to the laser performance. The thermal lensing of Cr:LiCAF has been directly measured and compared to that of alexandrite (BeAl2O4:Cr3+).4

© 1990 Optical Society of America

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