Distributed feedback semiconductor laser in which light intensity distributions differ in different polarization modes, and driving method therefor
US6252895A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1998 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Dec 2, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A distributed feedback semiconductor laser includes a cavity extending in a cavity-axial direction. The cavity has a plurality of regions including a first region and a second region arranged along the cavity-axial direction and capable of being independently pumped. The laser further includes a plurality of waveguides with a diffraction grating and an active layer extending along the cavity-axial direction. The waveguides are formed in the regions, respectively, and coupled to each other along the cavity-axial direction. Different first and second polatization modes are defined by the coupled waveguides. The waveguides are constructed such that light intensity distributions along the cavity-axial direction in the first and second regions when pumped are different between the first and second polarization modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.