Optical receiver and a free-space optical communications using the same
US7974543B2 · kind B2 · utility
2Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2008 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Mar 12, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/005
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A device for phase distortion compensation across an optical beam is provided. The device is a part of an optical receiver, which can be used in free space optical communications, remote sensing, optical imaging and others. 2M inputs of the combiner interfere with each other via a system of tunable coupled waveguides. The phases in interleaved waveguides of the combiner are adjusted to maximize the resulting output signal. The combiner may be used for coherent communication in combination with a balanced 90° hybrid. Integrated solutions for the proposed device are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.