Integrated circuit employing low loss spot-size converter
US7551826B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Jun 26, 2007 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Aug 16, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/3211
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An integrated circuit is provided with a photonic device and a spot-size converter waveguide device integrated on a common substrate. The spot-size converter waveguide device provides for transformation between a larger spot-size and a smaller spot-size corresponding to the photonic device. The spot-size converter waveguide device includes at least one of a bottom mirror and top mirror, which provide highly-reflective lower and upper cladding, respectively, for vertical confinement of light propagating through the waveguide device. The top mirror overlies opposing sidewalls of the spot-converter waveguide device, which provide highly-reflective sidewall cladding for lateral confinement of light propagating through the waveguide device. Advantageously, the highly-reflective lower cladding provided by the bottom mirror limits optical loss of the waveguide device. Similarly, the highly-reflective upper cladding and sidewall cladding provided by the top mirror limits optical loss of the waveguide device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.