Resonant cavity enhanced VCSEL/waveguide grating coupler
US6829286B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2002 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | Jul 11, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/4068
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical coupler comprises first and second mirrors. The first mirror is positioned with respect to the second mirror so that a resonant cavity is defined between them. A waveguide structure is positioned in the resonant cavity and includes a surface-normal grating structure. A thickness of the resonant cavity is selected so that a phase matching condition is satisfied for resonance in the resonant cavity. At least one of the first and second mirrors may be formed from a structure in an optoelectronic device. Alternatively, at least one of the first and second mirrors is formed from a semiconductor layer. At least one of the first and second mirrors may be formed as a semiconductor distributed bragg reflector, or as a dielectric distributed bragg reflector. At least one of the first and second mirrors may be a mirror in a vertical cavity surface emitting laser (VCSEL) structure. The surface-normal grating structure may be shaped so that first order modes of light incident upon the surface-normal grating structure are coupled into the waveguide while zero-order modes are reflected out into the resonant cavity and reflected by the mirror.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.