Polarization insensitive optical communication device utilizing optical preamplification
US4900917A · kind A · utility
29Cited by
7References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1988 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | Jul 15, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/69
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A polarization insensitive optical device is disclosed which is capable of providing direct optical amplification of an input signal of unknown (and possibly varying) polarization. A polarization diversity technique is utilized wherein a polarization beam splitter is used to divide the incoming signal into orthogonal components of known polarization (TE,TM). The orthogonal components are then separately amplified, using a semiconductor laser as the amplifying device. The amplified components are then recombined, either optically or electrically, to form the final output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.