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Combined wavefornt sensor and data detector for a free space optical communications system with adaptive optics

A technology of adaptive optics and data detection, applied in transmission systems, electromagnetic wave transmission systems, electrical components, etc., can solve problems such as increasing system cost and complexity, and reducing system reliability.

Inactive Publication Date: 2006-09-27
AOPTIX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of two separate detectors and the resulting registration requirements increase the cost and complexity of the overall system and also reduce the reliability of the system

Method used

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  • Combined wavefornt sensor and data detector for a free space optical communications system with adaptive optics
  • Combined wavefornt sensor and data detector for a free space optical communications system with adaptive optics
  • Combined wavefornt sensor and data detector for a free space optical communications system with adaptive optics

Examples

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Embodiment Construction

[0022] figure 1 -Illustrating an example of a Free Space Optical (FSO) communication system using adaptive optics. figure 1 The FSO communication system in is used to transmit data from an airborne transmitter 110 to a land-based receiver 120 via an FSO data link 150, which may be fixed or mobile. For convenience, the term "transceiver" will be used to refer to a transmit-only module 110, a receive-only module 120, and a module that both transmits and receives.

[0023] Each transceiver 110, 120 includes a telescope pointed at the other transceiver. Transmitting telescope 110 generally includes components that track receiving telescope 120 and direct light beam 150 toward receiving telescope 120 . Receive telescope 120 generally includes components that follow transmit telescope 110 and receive beam 150 from transmit telescope 110 . Examples of components that can be used for these purposes include steering mirrors, mechanical gimbals, tracking mechanisms and control loops,...

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Abstract

In an adaptive optics module, wavefront sensing and data detection are implemented in a single device (420). For example, an optical-to-electrical converter (427) converts a data-encoded optical beam to an intermediate electrical signal, which contains both the data encoded in the beam and also wavefront information about the beam. The data and wavefront information are later separated, for example by frequency filtering (428).

Description

technical field [0001] The invention relates to the field of free space optical communication. More specifically, the present invention relates to the use of adaptive optics (eg, including tip / tilt correction) as an enhancement to free-space optical communication links. Background technique [0002] With new developments in technology, there is growing interest in using free-space optical communication for various applications. For example, much of today's telecommunications infrastructure is based on the transmission of optical signals over optical fibers. Although the use of optical fiber has increased the capacity and efficiency of data transmission, there are still many situations where the laying of new optical fiber is not the optimal solution. Thus, the concern is to extend the telecommunications infrastructure by transmitting optical signals through free space through the atmosphere. [0003] Free-space optical communication links may also be used advantageously i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/00H04B10/60
Inventor 艾伦·J.·格雷夫斯梅尔克姆·J.·诺斯科特克里斯托弗·J.·肖尔登
Owner AOPTIX TECH