Single frequency laser source for optical data storage system
US6850475B1 · kind B1 · utility
12Cited by
59References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1997 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | Jun 26, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10569
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical data storage system utilizes optical fibers for transfer of information to and from storage media. The storage media includes magneto-optical storage disks. The optical fibers are single-mode polarization maintaining optical fibers. A single frequency laser diode provides a source of polarized light. Accordingly, a polarization state conveyed by the polarization maintaining optical fiber is accurately reproduced with reduced noise, as compared to use of a Fabry-Perot laser diode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.