Patent ID: 7414778

Claim:
A method of fabricating a wavelength conversion device, the method comprising: shaping a nonlinear optical material into a geometry that defines an input face, an output face, and an optical path extending from the input face to the output face; and poling the nonlinear optical material to form a plurality of periodically inverted poling domains arranged at an anti-back reflective periodicity Λ, wherein the geometry and the anti-back reflective periodicity Λ of the poled nonlinear optical material is selected such that the difference between a phase matching wavelength λ Φ of the poled nonlinear optical material and a Bragg wavelength λ BRAGG of the poled nonlinear optical material is greater than 1 nm over an operational temperature range, the Bragg wavelength λ BRAGG is a function of the anti-back reflective periodicity Λ of the poled nonlinear optical material, a forward propagating effective index of refraction η F of the poled nonlinear optical material, and a backward propagating effective index of refraction η B of the poled nonlinear optical material, and the phase matching wavelength λ Φ is a function of the anti-back reflective periodicity Λ of the poled nonlinear optical material, a converted frequency effective index of refraction η 2υ , of the poled nonlinear optical material and an input frequency effective index of refraction η IN of the poled nonlinear optical material.