Second-order optical nonlinearity of 10-mu m-thick periodically poled LiNbO3 films

We report on the fabrication and chi((2)) measurements of thin similar to 1 0-mu m-thick films of periodically poled LiNbO3, obtained by crystal ion sl icing. The d(33) optical coefficient in the films is probed by sum-frequenc y generation with a short-pulse laser source at 1550 nm and compared with t hat of the bulk. Efficient, room-temperature TM(omega, m = 0)-to-TM(omega omega, m = 0) mode conversion is obtained in the films. These measurements show that domain periodicity is preserved during ion implantation and that the thin films have bulklike nonlinearity and material dispersion. (C) 200 0 Optical Society of America OCIS codes: 130.3730, 310.6860, 190.4390, 160. 3730, 190.2620, 190.4400.