Transmitting an optical signal with corresponding WDM and TDM channels
US7164862B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2003 |
| Grant date | Jan 16, 2007 |
| Priority date | — |
| Expiry date | Sep 21, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0252
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical signal transmitter is disclosed that transmits an optical signal with corresponding Wavelength Division Multiplexing (WDM) channels and Time Division Multiplexing (TDM) channels. The transmitter is comprised of a laser, a dispersion system, and a modulator. The laser generates and transmits a narrow laser pulse comprised of a plurality of wavelength channels. The dispersion system broadens the narrow laser pulse into a wide laser pulse. The modulator modulates the wide laser pulse based on an electric modulation signal comprised of a plurality of time slot channels wherein the time slot channels in the electric modulation signal correspond to the wavelength channels in the wide laser pulse respectively. The modulator transfers a modulated wide laser pulse. Channels of the modulated wide laser pulse are hybrid wavelength and time slot channels. The transmitter singularly transmits a WDM optical signal comprised of multiple wavelength channels. The transmitter also allows a filter to drop time slot channels from a TDM optical signal instead of an expensive demultiplexer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.