10 April 1995 Crystal growth and laser damage of LiB3O5
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Abstract
We report on the top seeded solution growth of LBO from an excess of B2O3 solution. Parameters investigated included the Li2O/B2O3 ratio, rotation, pulling and cooling rates. Unstable crystal growth encountered, such as hopper growth and inclusions, can be attributed to the high viscosity of the solution, and methods of increasing the forced convection was examined by the melt simulation using the tracer method. With careful control of the above parameters, clear crystals of approximately 40 X 48 X 30 mm have been successfully grown. It was characterized that the grown LBO crystals have good optical homogeneity, no growth striations, no growth sector boundaries, small change of refractive index less than 1 X 10-5/cm. A bulk laser damage threshold of LBO was determined to be 45.0 GW/cm2 at 1.064 micrometers , 1.1 nsec pulse width. This is one of the highest bulk damage threshold of any inorganic nonlinear optical crystal.
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Yasunori Furukawa, Masayoshi Sato, Steven A. Markgraf, Hidetsugu Yoshida, Takatomo Sasaki, "Crystal growth and laser damage of LiB3O5", Proc. SPIE 2379, Solid State Lasers and Nonlinear Crystals, (10 April 1995); doi: 10.1117/12.206477; https://doi.org/10.1117/12.206477
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