Method and apparatus for relative positioning of a frequency, in particular an optical frequency
US5319489A · kind A · utility
2Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1992 |
| Grant date | Jun 7, 1994 |
| Priority date | — |
| Expiry date | Jan 24, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a method of the invention an emission wave (F(2P-1)) which is to be positioned within the spectrum relative to an external wave (F(2P-2)B) is modulated. Said external wave is mixed with one of the side waves that results from said modulation (F(2P-1)A) and the emission wave is positioned in response to variations in the frequency of a beat signal (F(2P-2)BE) that results from said mixing. The invention applies in particular to implementing an optical fiber communications network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.