Wave front sensor alignment and calibration techniques for laser communication systems

Aleksandr V. Sergeyev*, Eugene Levin, Michael C. Roggemann

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Laser communication systems operate in the presence of strong atmospheric turbulence, affecting communication platform by broadening of the laser footprint, random jitter of the laser beam, and high spatial frequency intensity fluctuations referred to as scintillation. The prediction of the effects induced by the atmospheric turbulence is a crucial task for reliable data transmission. Equipping the lasercom platform with adaptive optics system capable of probing the atmospheric turbulence and generating the data on wave front errors in real time improves performance and extends the range of optical communications systems. Most adaptive optics systems implement wavefront sensors to measure the errors induced by the atmospheric turbulence. Real time analysis of the data received from the wavefront sensor is used for outgoing laser beam compensation significantly improves the lasercom performance. To obtain reliable data, the wavefront sensor needs to be accurately aligned and calibrated. To model the performance of a laser communication system operating in the real world we have developed an outdoor 3.2 km, partially over water, turbulence measurement and monitoring communication link. The developed techniques of wavefront sensor alignment and calibration led to the successful data collection and analysis are discussed in this paper.

Original languageEnglish
Title of host publicationCyber Sensing 2012
PublisherSPIE
ISBN (Print)9780819490865
DOIs
StatePublished - 2012
Externally publishedYes
EventCyber Sensing 2012 - Baltimore, MD, United States
Duration: 24 Apr 201225 Apr 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8408
ISSN (Print)0277-786X

Conference

ConferenceCyber Sensing 2012
Country/TerritoryUnited States
CityBaltimore, MD
Period24/04/1225/04/12

Keywords

  • Adaptive optics,WFS
  • Alignment
  • Calibration turbulence
  • Laser communication channel
  • Registration

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