Measurement and characterization of laboratory-simulated turbulence parameters of interest to adaptive optics imaging and laser communications

Arun K. Majumdar; John A. DiUbaldo; Alenka Brown-VanHoozer

doi:10.1117/12.367585

3 November 1999 Measurement and characterization of laboratory-simulated turbulence parameters of interest to adaptive optics imaging and laser communications

Arun K. Majumdar, John A. DiUbaldo, Alenka Brown-VanHoozer

Author Affiliations +

Proceedings Volume 3760, High-Resolution Wavefront Control: Methods, Devices, and Applications; (1999) https://doi.org/10.1117/12.367585
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

Further results from the previously reported atmospheric turbulence chamber are discussed in this paper. The generated turbulence has been characterized by evaluating isotropy and homogeneity within the chamber by measuring temperature structure functions for various nozzle pressures and temperature differences. Measurements of higher-order intensity moments were utilized to reconstruct the probability density functions and were compared with Log- Normally Modulated Exponential, Log-Normal and Gamma distributions. The power spectrum of intensity fluctuations of a laser beam propagated through the generated turbulence provided additional characterization of the chamber regarding scale sizes and frequency cut-offs. Fried's parameter (r₀) and the Greenwood frequency of the artificially generated turbulence were computed and were shown that it is possible to simulate the real atmospheric parameters with a modified design of the present chamber.

Citation Download Citation

Arun K. Majumdar, John A. DiUbaldo, and Alenka Brown-VanHoozer "Measurement and characterization of laboratory-simulated turbulence parameters of interest to adaptive optics imaging and laser communications", Proc. SPIE 3760, High-Resolution Wavefront Control: Methods, Devices, and Applications, (3 November 1999); https://doi.org/10.1117/12.367585

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