Method for synchronizing optical signals, an optical synchronizing devices and an optical network node therefor
US6690891B1 · kind B1 · utility
5Cited by
4References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 4, 2000 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Mar 23, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0041
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for synchronizing optical signals conducted via different optical waveguides to an optical network node, wherein the variations in propagation time of the optical signals are compensated by adjustable optical delay circuits of a synchronizing device. To set a new delay for one of the optical waveguides, one of the adjustable delay circuits, already switched into the passive state, is set at the desired delay. This delay circuit is then switched into the active state by means of a high-speed optical switch, and the previously active delay circuit is switched into a passive state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.