Second harmonic generation and sum frequency mixing of Nd:YAlO/sub 3/ laser in flux grown 7.5 mol% Nb KTP crystals

KTiOPO/sub 4/ (KTP) crystals doped with Nb (Nb:KTP) can not only largely blue-shift the cut-off wavelength for the type II second harmonic generation (SHG) phase matching of KTP crystals, but can also change the optimum phase matching angle of Nd:YAG 1.0642 /spl mu/m laser which has a noncritical phase matching direction.