Phase-shift distributed-feedback semiconductor laser
US4847856A · kind A · utility
14Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1988 |
| Grant date | Jul 11, 1989 |
| Priority date | — |
| Expiry date | Apr 26, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/1246
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A phase-shift distributed-feedback semiconductor laser includes an electrode for injecting a current to the entire area of the semiconductor laser. The laser also includes portions each for shifting an optical phase by a 1/4 wavelength at at least three locations, the number of which is an odd number. These portions are formed in a light propagation direction of the phase-shift distributed-feedback semiconductor laser structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.