Broadcasting arrayed waveguide
US7639908B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2008 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Jan 23, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0226
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The invention is a data transmission device that includes: an input Free Propagation Region (FPR) receiving a multi-wavelength signal and a single-wavelength signal, and two sets of arrayed waveguides coupled to the input FPR to carry the multi-wavelength signal and the single-wavelength signal, respectively. The arrayed waveguides demultiplex the multi-wavelength signal and create copies of the single-wavelength signal. The output plane of an output FPR receives the demultiplexed wavelengths and the copies of the single-wavelength signal such that one of the demultiplexed wavelengths and one of the copies of the single-wavelength signal focus onto the same position on the output plane. The device allows data (e.g., video stream) to be broadcast to all subscribers in a Wavelength-Division-Multiplexed Passive Optical Network (WDM-PON) architecture. A multicasting apparatus can be implemented by using a plurality of these devices and using different wavelengths for the single-wavelength signal for the different devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.