Gain-coupled DFB laser with index coupling compensation
US5452318A · kind A · utility
30Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1993 |
| Grant date | Sep 19, 1995 |
| Priority date | — |
| Expiry date | Dec 16, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/187
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A gain-coupled distributed feedback (DFB) laser or amplifier structure having a gain-coupling grating in the form of grooves periodically etched through strained, multi-quantum wells. The etched grooves are regrown with buffer material having a bandgap selected to compensate for index-coupling aid to block carrier leakage. The low carrier leakage reduces non-radiative recombination which in turn increases quantum efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.