Patent ID: 8749875
Filing Date: 2014-06-10
Classification: G02F

Abstract:
1. A non-linear optical device for converting optical radiation of a first frequency into optical radiation of a second frequency, the non-linear optical device comprising: a first optical waveguide having a waveguide core comprising optically non-linear material, the first optical waveguide supporting, at the first frequency, a first transverse mode that is excited by a first excitation source, and the first optical waveguide supporting, at the second frequency, a second transverse mode so as to provide phase velocities of the first and second transverse modes at the first and second frequencies respectively, that are substantially equal; and a second optical waveguide coupled to the first optical waveguide, the second optical waveguide supporting, at the first frequency, a fundamental mode that is excited by a second excitation source, wherein the longitudinal axes of the first and second optical waveguides lie in the same plane and intersect at an angle that provides for fundamental mode radiation at the first frequency in the second optical waveguide to excite the first transverse mode supported by the first optical waveguide.