2ND-ORDER QUASI-PHASE-MATCHED BLUE-LIGHT GENERATION IN A BULK PERIODICALLY POLED LITAO3

Domain reversal in LiTaO3 with period 6.5 mu m and 1:3 duty cycle has been obtained by using a partially switching technique in a 0.25 mm th ick sample. A CW second-order quasi-phase-matched second-harmonic-gene ration experiment yielded a 12 mu W, 407 nm blue light output for 200 mW, 814 nm fundamental input. The technique can be used for the fabric ation of the periodic poled LiTaO3 for bulk violet and ultraviolet sec ond-harmonic generation and for the fabrication of other ferroelectric microstructure materials.