Method and apparatus for generating optical duobinary signals with enhanced receiver sensitivity and spectral efficiency
US8238757B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2007 |
| Grant date | Aug 7, 2012 |
| Priority date | — |
| Expiry date | May 7, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/5167
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical network transmitter comprising a fractional-bit delay module, an optical modulator coupled to the fractional-bit delay module, and a band-limiting optical filter coupled to the optical modulator. Also disclosed is a transmission system comprising a source configured to generate two complementary binary data streams, a fractional-bit delay module in communication with the source and configured to delay one of the complementary binary data streams, a modulation module in communication with the source and the fractional-bit delay module and configured to convert the undelayed complementary binary data streams and the delayed complementary binary data streams into a fractional-bit delayed optical duobinary signal, and a band-limiting node in communication with the modulation module and configured to filter and transmit the optical duobinary signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.