GROWTH AND CHARACTERIZATION OF K3LI2(TAXNB1-X)(5)O-15 CRYSTALS FOR BLUE 2ND-HARMONIC-GENERATION APPLICATIONS

Potassium lithium tantalate niobate, K3Li2(TaxNb1-x)(5)O-15, or KLTN s ingle crystals were grown by spontaneous crystallization method, and i t has been demonstrated that the KLTN crystal has high potential as a nonlinear crystal for blue second-harmonic-generation (SHG) applicatio ns, Ta substitution for Nb site in K3Li2Nb5O15 crystal improves the tr ansparency in the blue light region and decolorizes the material. Comp ared with K3Li2Nb5O15, the K3Li2Ta5O15 crystal exhibits a 60 nm bluesh ift of the absorption edge from 376 to 316 nm, and decreases its absor ption coefficient from 2.3 to 0.3 cm(-1) at 400 nm. The phase-matched frequency doubling of the Ti:sapphin infrared laser for blue SHG at ro om temperature has been demonstrated with the KLTN bulk crystal. (C) 1 996 American Institute of Physics.