OPTICAL DEVICE CONTAINING NONLINEAR OPTICAL SINGLE CRYSTAL

摘要

PROBLEM TO BE SOLVED: To provide a small optical device having a wavelength conversion function in addition to wavelength selection.;SOLUTION: In the optical device including an input waveguide which guides first light at least having first wavelength λ_n and at least has a first effective refractive index n_n at least to the first wavelength λ_n, an output waveguide which guides second light at least having second wavelength λ_n' and has a second effective refractive index to at least the second wavelength λ_n' and a ring waveguide which is positioned between the input waveguide and the output waveguide to guide the first light and the second light, the first wavelength λ_n and the second wavelength λ_n' satisfy relation λ_n'=λ_n/2, the ring waveguide is formed on a nonlinear optical single crystal and has polarization reversal structure of prescribed circumference L and a prescribed period Λ. Λ=λ_n/2×[1/(n_n' - n_n)], L=K×λ_n/n_n (K: an integer).;COPYRIGHT: (C)2009,JPO&INPIT