Crystal Growth And Evaluation Of Rare Earth Orthogallates For Laser Hosts

Roger F. Belt; Robert Uhrin

doi:10.1117/12.960596

25 September 1989 Crystal Growth And Evaluation Of Rare Earth Orthogallates For Laser Hosts

Roger F. Belt, Robert Uhrin

Proceedings Volume 1104, Growth, Characterization, and Applications of Laser Host and Nonlinear Crystals; (1989) https://doi.org/10.1117/12.960596
Event: SPIE 1989 Technical Symposium on Aerospace Sensing, 1989, Orlando, FL, United States

Abstract

Single crystals of the perovskite-related rare earth orthogallates have been grown and examined for laser hosts. LaGaO₃ in pure form generally contains color centers or other intrinsic defects which lead to a high absorption from the ultra-violet to about 600 nm. NdGaO₃ can be grown in large clear boules with proper care. Most orthogallates contain some twins which limit optical quality. Twins can be eliminated in growth by a judicious choice of mixed crystals involving La-Nd, La-Gd, or La-Y crystal compositions which have their lattice constants adjusted to an ideal cubic unit cell. We have grown crystals of one atomic percent Nd:LaGaO₃ for specific evaluation. The fluorescent lifetime was measured as 225 μs. We also report absorption spectra and fluorescent emission data for this crystal.

Citation Download Citation

Roger F. Belt and Robert Uhrin "Crystal Growth And Evaluation Of Rare Earth Orthogallates For Laser Hosts", Proc. SPIE 1104, Growth, Characterization, and Applications of Laser Host and Nonlinear Crystals, (25 September 1989); https://doi.org/10.1117/12.960596

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