Method and apparatus for communicating a clock signal in a soliton optical transmission system
US6486990B1 · kind B1 · utility
11Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1998 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Dec 18, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A sub-harmonic clock signal is provided in a series of soliton optical pulses that are transmitted at a given line rate in a soliton optical transmission system. The line rate defines time slots of equal duration. Each soliton optical pulse in every N time slots is modulated in a manner to make the pulse distinguishable from pulses in other time slots. The frequency of the sub-harmonic clock signal is equal to the line rate divided by N. This technique of providing a clock signal allows simple recovery of the clock signal using a PIN diode photo detector and a bandpass filter of appropriate bandwidth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.