Naoki HASHIZUME, Takao TSURUZONO, Takashi KONDO and Ryoichi ITO

Department of Applied Physics, Faculty of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113

(Received October 30, 1996; Accepted December 20, 1996)

We have developed a new method to fabricate periodic waveguide structures used for quasi-phase-matched second-harmonic generation, where nonlinear optical organic crystals and fluorinated copolyimides are alternately arranged. Quasi-phase-matched second-harmonic generation from an organic waveguide device has been demonstrated.

Key words : optical waveguide, second-harmonic generation, quasi-phase matching, organic crystal, fluorinated polyimide, inorganic photoresist, reactive-ion-beam etching