Oscillation polarization mode selective semiconductor laser, light transmitter and optical communication system using the laser
US5901166A · kind A · utility
39Cited by
7References
13Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 18, 1997 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | Nov 18, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A semiconductor laser that selectively performs oscillations in different polarization modes has first and second laser regions on a substrate. The first laser region exhibits a gain spectrum in which one polarization mode is dominant and the second laser region exhibits a gain spectrum in which a different polarization mode is dominant. Current injected independently into the each laser region causes polarization mode oscillation competition. One of the different polarization mode oscillations is selected by, for example, injecting a minute modulated current into at least one of the first and second laser regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.