Measurements of angle-of-arrival fluctuations over an 11.8 km urban path

Abstract

A laser transmission experiment is conducted to examine atmospheric turbulence-induced angle-of-arrival fluctuations over an 11.8 km urban path. The variance of fluctuations, probability density function, power spectrum, and Fried coherence length are investigated based on the analysis of the experimental data collected in each season of a year, respectively. In addition, the daily variations characteristic of path-averaged optical turbulence intensity Cn2 is also studied. At last, the aperture averaging theory is validated. It is anticipated that this work is helpful to the research of optical wave atmospheric propagation and the design of free-space laser optics communication systems.

Spectrum characteristics of optical misalignment induced by satellite platform vibration and angle of arrival fluctuation

“…One of the two optical systems is placed on the 28th floor (100m above ground level) of a building in Songbei area of Harbin, and the other is on the roof of a building in urban area. This laser link is similar to the link of another experiment reported in [13,14].…”