Polarization multiplexed light transmitter and control method thereof
US8412047B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2009 |
| Grant date | Apr 2, 2013 |
| Priority date | — |
| Expiry date | Feb 9, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/58
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The polarization multiplexed light transmitter takes out a part of a polarization multiplexed light to be transmitted as a monitor light; makes orthogonal polarization components contained in the monitor light to interfere with each other, to generate a polarization interfering light; converts the polarization interfering light into an electric signal; measures the power of an alternate current component contained in the electric signal after eliminating a direct current component thereof; and feedback controls delay amount varying sections so that an inter-polarized channel delay time judged based on a change in the measured power reaches a predetermined value. Thus, the delay time between the orthogonal polarization components in the polarization multiplexed light can be varied flexibly at a high speed with a simple configuration, and thus, it becomes possible to suppress transmission characteristics degradation of the polarization multiplexed light due to a change in system state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.