Optical semiconductor device
US8463086B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2010 |
| Grant date | Jun 11, 2013 |
| Priority date | — |
| Expiry date | Aug 17, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/176
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical semiconductor device in which light having a wavelength of 1.25 μm or greater is waveguided, includes: a first waveguide of embedded type that includes a semiconductor and is lattice-matched with InP, the first waveguide having a region having a first constant width equal to or greater than 1.50 μm and a first region narrower than the region; and a second waveguide of embedded type that includes another semiconductor having a refractive index different from that of the first waveguide, the second waveguide having a region having a second constant width smaller than 1.50 μm and a second region wider than said region. The first waveguide and the second waveguide are joined at an intermediate waveguide portion. The intermediate waveguide portion includes the first region and the second region and a joining plane on which the first region and the second region are joined. The joining plane has a width equal to or smaller than 1.35 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.