Optical waveguide coupler and its characteristic adjusting method
OwnerMakoto Fujimakiinventor
Life of this patent
Estimating the term…
Abstract
The present invention provides methods that can adjust the coupling ratio of an optical waveguide coupler efficiently. The coupling ratio is adjusted by varying the propagation constants βa and βb and the coupling coefficient x of the coupling portion by varying the refractive index of the coupling portion by implanting accelerated ions into waveguide cores of the coupling portion, or into the claddings around the cores, of the coupler fabricated. This enables efficient adjustment of the coupling ratio of the optical waveguide coupler.
Claims20
A characteristic adjusting method of an optical waveguide coupler comprising the steps of:
- generating accelerated ions;
- and
- adjusting a coupling ratio of the optical waveguide coupler by implanting the accelerated ions into a coupling portion of the optical waveguide coupler to vary refractive index of the coupling portion.
An optical waveguide coupler comprising a coupling portion whose coupling ratio is adjusted by varying a refractive index of the coupling portion by implanting accelerated ions into the coupling portion of the optical waveguide coupler.
Dependencies are inferred from the claim text.