Patent ID: 7931831

Claim:
A method of producing a device comprising an optical waveguide substrate and a supporting body, said optical waveguide substrate comprising a channel optical waveguide with a periodic domain inversion structure formed therein, the method comprising the steps of: applying a voltage on an interdigitated electrode provided on a first main face of a single-domain ferroelectric single crystal substrate to form a periodic domain inversion structure; then removing the interdigitated electrode from the first main face of the ferroelectric single crystal substrate; then adhering the first main face of the ferroelectric single crystal substrate to the supporting body; then thinning the ferroelectric single crystal substrate from a second main face of the ferroelectric single crystal substrate to provide the optical waveguide substrate; and then forming the channel optical waveguide in the optical waveguide substrate, wherein a projected location P 2 of an optical intensity center P 1 of the optical waveguide on a first main face of the optical waveguide substrate adhered to the supporting body is kept away from a projected location P 0 of the end of the interdigitated electrode on the first main face of the optical waveguide substrate.