Distributed-feedback semiconductor laser device
US4775980A · kind A · utility
15Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1985 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | Jul 26, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/2072
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A distributed feedback semiconductor laser provided with a grating which effects optical feedback by means of periodic corrugation disposed inside an optical resonator. The optical resonator has at least two regions having different Bragg wavelengths, and these regions are arranged longitudinally in the direction of an optical axis. The laser device can realize stable single longitudinal mode oscillation through variation of the refractive indexes of the regions nonuniformly around an average value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.