Gaussian beam propagation in maritime atmospheric turbulence: long term beam spread and beam wander analysis

Italo Toselli; Brij Agrawal; Sergio Restaino

doi:10.1117/12.864274

24 August 2010 Gaussian beam propagation in maritime atmospheric turbulence: long term beam spread and beam wander analysis

Italo Toselli, Brij Agrawal, Sergio Restaino

Author Affiliations +

Proceedings Volume 7814, Free-Space Laser Communications X; 78140R (2010) https://doi.org/10.1117/12.864274
Event: SPIE Optical Engineering + Applications, 2010, San Diego, California, United States

Abstract

Laser beam propagation in maritime environment is particularly challenging, not only for scattering and absorption due to high humidity, but also for a different behavior of atmospheric turbulence with respect to terrestrial propagation. Recently, a new power spectrum for the fluctuations of the refractive index in the Earth's atmosphere has been introduced to describe maritime atmospheric turbulence. This maritime power spectral model shows a characteristic bump, similar to Hill's bump, that appears when the product between the wavenumber and the inner scale is around unity, κ • l₀ ~1. In this paper, under weak turbulence conditions, we use the mentioned maritime power spectrum to analyze long term beam spread, beam wander and Strehl ratio of a Gaussian beam wave propagating through maritime atmospheric turbulence.

Citation Download Citation

Italo Toselli, Brij Agrawal, and Sergio Restaino "Gaussian beam propagation in maritime atmospheric turbulence: long term beam spread and beam wander analysis", Proc. SPIE 7814, Free-Space Laser Communications X, 78140R (24 August 2010); https://doi.org/10.1117/12.864274

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