GROWTH OF OPTICAL SUPERLATTICE LINBO3 WITH DIFFERENT MODULATING PERIODS AND ITS APPLICATIONS IN 2ND-HARMONIC GENERATION

Optical superlattice LiNbO3 crystals with a modulation period number o ver 200 and a modulation period from 2.0 to over 15.0 mu m were grown by the Czochralski method in a carefully designed asymmetric temperatu re field system. Measurements of the frequency doubling efficiency for generating light from blue to green were performed, The largest effic iency obtained was 24.0% for frequency doubling of a picosecond 980 nm fundamental light, The angle tuning tolerance of a LiNbO3 optical sup erlattice was measured to be over 10 degrees of the incidence angle. ( C) 1996 American Institute of Physics.