Optical channel monitor for a wavelength selective switch employing a single photodiode
US9680570B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2015 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | May 30, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0212
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of monitoring at least one optical wavelength component of a WDM optical signal being routed through a wavelength selective switch (WSS) includes directing an optical wavelength component from a given input port of the WSS to a selected output port with a selected amount of attenuation. A rejected portion of the optical wavelength component giving rise to the selected amount of attenuation is directed to an optical monitor associated with another output port of the WSS. A power level of the optical wavelength component is determined by pre-calibrating a proportionality between the power level of the wavelength component and the power level of the rejected portion that is directed to the optical monitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.