Method for polarization mode dispersion compensation
US6907199B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2001 |
| Grant date | Jun 14, 2005 |
| Priority date | — |
| Expiry date | Sep 21, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2569
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for compensating for polarization mode dispersion of an incoming optical communications signal including the step of orienting the state of polarization of the incoming optical communications signal with respect to the axes of a polarization splitter. The communications signal is split into a first and a second orthogonal states of polarization at a split point. The first of the polarization states is directed to a first birefringent optical waveguide having a first chirped grating having a first reference reflection point. The second of the polarization states is directed to a second birefringent optical waveguide having a second chirped grating having a chirp pattern substantially similar to that of the first chirped grating and having a second reference reflection point. The optical path length from the second reflection point to the split point is adjustably varied to compensate for polarization dispersion between the first and second states of polarization. The first and second polarization states are then recombined into an output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.