Multiple input waveguide grating router for broadcast and multicast services
US6697574B2 · kind B2 · utility
5Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2001 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Apr 2, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0049
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical telecommunications network suitable for carrying broadcast and switched services. The network includes a wavelength division multiplexing (WDM) coupled to a waveguide grating router (WGR). In accordance with the invention, an adjacent input port is connected with the same optical content. Thus, its outputs are adjacent (or wrapped around). According, the optical power in each of the broadcast bands at the outputs remains the same but is reduced by a factor of two in power for each channel but occupying twice as many channels. This has the effect of increasing the SNR by a factor of two.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.