Turbulence strength and temporal correlation in a terrestrial laser communication link

Jaime A. Anguita; Jaime E. Cisternas

doi:10.1117/12.860288

24 August 2010 Turbulence strength and temporal correlation in a terrestrial laser communication link

Proceedings Volume 7814, Free-Space Laser Communications X; 78140H (2010) https://doi.org/10.1117/12.860288
Event: SPIE Optical Engineering + Applications, 2010, San Diego, California, United States

Abstract

In a laboratory experiment we propagate a continuous-wave, expanded laser beam over a surface with evenly distributed heat and record the received distorted optical signal. Temperature is continuously measured in two fixed points to determine turbulence strength. Through a number of trials covering a wide range of turbulence conditions we demonstrate that the temporal correlation of the received signal fluctuations has a strong dependence on the turbulence strength at the link path. Power spectra of the received signals show a clear increase in both slope and maximum frequency as the temperature gradient increases. Measurements suggest that scintillation also correlates with temporal correlation at weak turbulence conditions and such correlation decays in stronger conditions.

Citation Download Citation

Jaime A. Anguita and Jaime E. Cisternas "Turbulence strength and temporal correlation in a terrestrial laser communication link", Proc. SPIE 7814, Free-Space Laser Communications X, 78140H (24 August 2010); https://doi.org/10.1117/12.860288

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