Atmospheric scintillation pattern analysis through pupil plane imaging

Austin Singh; Rita Mahon; Mike S. Ferraro; Zachary T. Zern; William S. Rabinovich

doi:10.1117/12.3006797

13 March 2024 Atmospheric scintillation pattern analysis through pupil plane imaging

Austin Singh, Rita Mahon, Mike S. Ferraro, Zachary T. Zern, William S. Rabinovich

Proceedings Volume 12877, Free-Space Laser Communications XXXVI; 128771Y (2024) https://doi.org/10.1117/12.3006797
Event: SPIE LASE, 2024, San Francisco, California, United States

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Abstract

The effects of anisotropy in atmospheric turbulence is studied through imaging of intensity speckles seen on a laser beam propagated over a 16 km range over the Chesapeake Bay. A high speed InGaAs camera records images of the entrance pupil of a 150mm diameter lens for exposure times of less than 50 us, much faster than atmospheric fluctuations. Various image processing techniques are used to investigate the effects of anisotropy, including spatial correlation of intensities across the image and aperture averaging analysis. Supporting concurrent measurements of Cn2 from angle-of-arrival measurements as well as scintillation index will be presented. Wave optics simulations of spatial irradiance patterns for corresponding Cn2 levels in isotropic turbulence will be presented.

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Austin Singh, Rita Mahon, Mike S. Ferraro, Zachary T. Zern, and William S. Rabinovich "Atmospheric scintillation pattern analysis through pupil plane imaging", Proc. SPIE 12877, Free-Space Laser Communications XXXVI, 128771Y (13 March 2024); https://doi.org/10.1117/12.3006797

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