Reducing cross modulation in multichannel modulated optical systems with anti-clipping
US8165474B2 · kind B2 · utility
4Cited by
27References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2008 |
| Grant date | Apr 24, 2012 |
| Priority date | — |
| Expiry date | Dec 18, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/25751
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A modulated optical system with anti-clipping reduces or corrects clipping that might occur in the laser as a result of negative spikes or peaks in a multichannel RF signal. The system generally detects an envelope of the RF signal to generate an anti-clipping signal that follows at least a portion of the envelope and prevents one or more negative peaks from causing clipping by adjusting a bias current in response to the anti-clipping signal. The system may also reduce cross modulation by clamping the anti-clipping signal at an anti-clipping limit during lower power periods of the RF signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.