Optical waveguide device and second harmonic generator using the same
First Claim
1. An optical waveguide device comprising:
- a substrate made of an optical material; and
an optical waveguide core disposed on said substrate, wherein a refractive index of said optical material forming said optical waveguide core is larger than a refractive index of said substrate by 0.1 or greater, a thickness or width of said optical waveguide core is smaller than a wavelength of guided light in the air, and a wavelength of light of a high-order mode is emitted with an intensity distribution of a single peak response.
1 Assignment
0 Petitions
Accused Products
Abstract
An optical waveguide device for use as a second harmonic generator includes a nonlinear optical crystalline substrate of KTiOPO4 and an optical waveguide core of a dielectric material, such as Ta2 O5, disposed on the nonlinear optical crystalline substrate. The optical waveguide converts a fundamental wave having a wavelength λ which is guided through the optical waveguide into a second harmonic wave having a wavelength λ/2, the second harmonic wave having the same polarization as the fundamental wave which is guided through the optical waveguide. The optical waveguide has a thickness of 190 nm or greater. The optical waveguide device also has a dielectric loaded strip disposed on the optical waveguide core. The dielectric loaded strip may be made of SiO2 or SiO2 doped with Ta2 O5. Alternatively, the optical waveguide may be a ridge-type optical waveguide, and the optical waveguide device may also has a cladding layer disposed on the nonlinear optical crystalline substrate and the optical waveguide core.
-
Citations
10 Claims
-
1. An optical waveguide device comprising:
-
a substrate made of an optical material; and an optical waveguide core disposed on said substrate, wherein a refractive index of said optical material forming said optical waveguide core is larger than a refractive index of said substrate by 0.1 or greater, a thickness or width of said optical waveguide core is smaller than a wavelength of guided light in the air, and a wavelength of light of a high-order mode is emitted with an intensity distribution of a single peak response. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification