Space diversity receiver for optical communications
US7949262B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2009 |
| Grant date | May 24, 2011 |
| Priority date | — |
| Expiry date | Jul 20, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/1225
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
An optical beam combiner is provided, which allows efficient collection of light for various applications: non-line of sight and free-space optical communications, remote sensing, optical imaging and others. A multitude of transverse scattered optical beam portions is captured by the multi-aperture array positioned perpendicular to the beam projection direction. These beam portions are combined first into a single optical waveguide with modulating the beam portions phase and coupling ratio of directional couplers in the optical beam combiner tuned to maximize the final output power. A portion of the output beam is used for the power detection and forming a feedback signal for the phases and coupling ratios adjustment. The data is recovered from the received optical beam using coherent detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.