Distributed feedback laser device
US6912239B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 2002 |
| Grant date | Jun 28, 2005 |
| Priority date | — |
| Expiry date | Sep 11, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/2004
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A distributed feedback laser device inhibiting beam coupling coefficient variation resulting from fabrication dispersion and improving fabrication yield. The distributed feedback laser device includes cladding layers provided on an InP substrate and located on both sides of an active layer and a diffraction grating having grating bars, different in refractive index from the cladding layers, in either cladding layer and extending in a direction perpendicular to a light emission direction at a prescribed pitch in the emission direction, as well as at least one light distribution control layer, located in the cladding layer, spaced from the diffraction grating and having the same composition as the diffraction grating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.