Turbulence strength and temporal correlation in a terrestrial laser communication link

Jaime A. Anguita; Jaime E. Cisternas

doi:10.1117/12.860288

Turbulence strength and temporal correlation in a terrestrial laser communication link

Jaime A. Anguita, Jaime E. Cisternas

Research output: Contribution to conference › Paper

1 Scopus citations

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.

Original language	American English
DOIs	https://doi.org/10.1117/12.860288
State	Published - 28 Oct 2010
Event	Proceedings of SPIE - The International Society for Optical Engineering - Duration: 1 Jan 2019 → …

Conference

Conference	Proceedings of SPIE - The International Society for Optical Engineering
Period	1/01/19 → …

Keywords

Atmospheric turbulence
Free-space laser communication
Optical propagation
Scintillation
Signal fading
Temporal correlation
Temporal spectrum

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title = "Turbulence strength and temporal correlation in a terrestrial laser communication link",

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.",

keywords = "Atmospheric turbulence, Free-space laser communication, Optical propagation, Scintillation, Signal fading, Temporal correlation, Temporal spectrum, Atmospheric turbulence, Free-space laser communication, Optical propagation, Scintillation, Signal fading, Temporal correlation, Temporal spectrum",

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AU - Anguita, Jaime A.

AU - Cisternas, Jaime E.

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N2 - 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.

AB - 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.

KW - Atmospheric turbulence

KW - Free-space laser communication

KW - Optical propagation

KW - Scintillation

KW - Signal fading

KW - Temporal correlation

KW - Temporal spectrum

KW - Atmospheric turbulence

KW - Free-space laser communication

KW - Optical propagation

KW - Scintillation

KW - Signal fading

KW - Temporal correlation

KW - Temporal spectrum

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