Apparatus and methods for mitigating wavelength drift in an optical communication network
US10236992B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2017 |
| Grant date | Mar 19, 2019 |
| Priority date | — |
| Expiry date | Mar 31, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q11/0066
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for mitigating wavelength drift in an optical communication network. A network node such as an OLT in a PON receives a transmission on a certain optical channel. The received signal is of course sent to a receive module for processing the data contained therein, and may be sent to an RSSI module for signal strength analysis. A portion of the received transmission, however, is directed to a wavelength control section where it is divided into at least a first path and a second path, the second path having a wavelength discriminator filter. The light propagating along each path is converted to an electrical signal and digitized for comparison by a microcontroller. The microcontroller calculates one or more power ratios and from this determines the receive signal wavelength. This wavelength is compared to the wavelength of a selected channel to determine what if any adjustments should be made.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.