Method and apparatus for compensating dispersion of polarization
US5473457A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1994 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Dec 16, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2572
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A signal light which is frequency-modulated by a predetermined frequency is supplied to an optical fiber. The signal light supplied from an output end of the optical fiber is supplied to a polarization controller, from which the signal light is supplied to a polarization maintaining optical fiber. An output signal light of the polarization maintaining optical fiber is supplied to a polarization separating device, in which two orthogonal polarizations are obtained. Signal lights of the two orthogonal polarizations are received by a balanced photodetector, in which an electric signal is generated. In the electric signal, an intensity of the predetermined frequency component is detected. Then, the polarization controller is controlled to constantly minimize the intensity, so that the polarization dispersion in a transmission line is compensated to suppress the deterioration of wave-shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.