Semiconductor optical device
US5737474A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1995 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Oct 13, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/50
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A semiconductor optical device is provided which includes a semiconductor substrate, a first core layer disposed on the substrate with a second core layer being interposed between the substrate and the first core layer. The second core layer has a lower refractive index than that of the first core layer. A ridge-shaped optical waveguide region is formed in a top surface of the first core layer. The width of the ridge-shaped optical waveguide is modulated along a direction which coincides with an optical axis of the semiconductor optical device. Further, the width of a bottom surface of the ridge-shaped optical waveguide is selected not to be greater than 4 .mu.m over a whole length thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.