21 October 2014 Experimental setup for investigation of laser beam propagation along horizontal urban path
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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 modelling of double-passage systems.
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Rui Barros, Rui Barros, Sarah Keary, Sarah Keary, Lydia Yatcheva, Lydia Yatcheva, Italo Toselli, Italo Toselli, Szymon Gladysz, Szymon Gladysz, } "Experimental setup for investigation of laser beam propagation along horizontal urban path", Proc. SPIE 9242, Remote Sensing of Clouds and the Atmosphere XIX; and Optics in Atmospheric Propagation and Adaptive Systems XVII, 92421L (21 October 2014); doi: 10.1117/12.2070694; https://doi.org/10.1117/12.2070694
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