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Experimental setup for investigation of laser beam propagation along horizontal urban path

 
: Barros, Rui; Keary, Sarah; Yatchevaa, Lydia; Toselli, Italo; Gladysz, Szymon

:

Comeron, A. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Remote Sensing of Clouds and the Atmosphere XIX and Optics in Atmospheric Propagation and Adaptive Systems XVII : 22 - 25 September 2014, Amsterdam, Netherlands
Bellingham, WA: SPIE, 2014 (Proceedings of SPIE 9242)
ISBN: 9781628413052
Paper 92421L, 9 S.
Conference "Remote Sensing of Clouds and the Atmosphere" <19, 2014, Amsterdam>
Conference "Optics in Atmospheric Propagation and Adaptive Systems" <17, 2014, Amsterdam>
Englisch
Konferenzbeitrag
Fraunhofer IOSB ()
adaptive optics; atmospheric turbulence; scintillation

Abstract
It is well known that a laser beam propagating through optical atmosphere is affected by atmospheric turbulence. In this paper, we describe an experimental double-passage system for laser beam propagation along a horizontal urban path that can be useful for applications such as free-space laser communications. The setup includes a telescope to focus a laser beam on a retro-reflector, which is located 410 meters away, and the optical-test bench with which we measure intensity and phase fluctuations of the reflected beam. In our measurements scintillation is decreasing with distance from the center of the pupil. This shows the need for further theoretical modeling of double-passage systems.

: http://publica.fraunhofer.de/dokumente/N-320050.html