Optical device having diffraction gratings coupling guided wave, and its manufacture method
US7574083B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 5, 2008 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | Feb 5, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/3412
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical waveguide structure formed over a substrate defines an optical waveguide for guiding light along a direction parallel to the substrate surfaces, and biasing a light intensity distribution of transverse modes of guided wave toward a first side of the optical waveguide path. A main diffraction grating is disposed at least on a second side opposite to the first side, and coupled with the guided wave propagating along the optical waveguide. A subsidiary diffraction grating is disposed on the first side, and diffracts the guided wave coupled with the main diffraction grating and propagating along the optical waveguide, to a direction different from an extending direction of the optical waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.