Integrated multi-wavelength and wideband lasers
US6628686B1 · kind B1 · utility
45Cited by
26References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 16, 2001 |
| Grant date | Sep 30, 2003 |
| Priority date | — |
| Expiry date | Nov 16, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/509
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser has a spatially varying absorption spectrum formed in a monolithic InGaAsP structure whose quantum well active structure has modified effective bandgap properties. The spatially varying emission spectrum allows emission at multiple wavelengths or emission in a broad band. The effective bandgap properties can be modified by rapid thermal annealing to cause the diffusion of defects from one or two InP defect layers into the quantum well active structure. The laser can be implemented variously as a Fabry-Perot laser and a laser array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.