Multiple wavelength, surface emitting laser with broad bandwidth distributed Bragg reflectors
US5699375A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 1996 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Jul 8, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/4087
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multiple wavelength surface emitting laser has a first and second broad bandwidth distributed Bragg reflector (DBR) which reflect light at multiple wavelengths. The surface emitting laser structure comprises at least two cavities with each cavity containing one or more active layers for respectively emitting light at different wavelengths. In a preferred embodiment for a dual wavelength surface emitting laser, a first cavity contains a first active layer for emitting light of a first wavelength and a second cavity contains only a second active layers and emits only light of the second longer wavelength. The second layer has been eliminated in the first cavity and the first active layer has been eliminated in the second cavity by layer intermixing before completing the epitaxial growth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.