Angle-of-arrival variance’s dependence on the aperture size for indoor convective turbulence
| Autor: | Damián Gulich, Luciano Zunino, Darío G. Pérez, Gustavo Funes, Mario Garavaglia |
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| Rok vydání: | 2007 |
| Předmět: |
Physics
Wavefront Hurst exponent Fractional Brownian motion business.industry Turbulence Atomic and Molecular Physics and Optics Collimated light Electronic Optical and Magnetic Materials law.invention Lens (optics) Optics Tilt (optics) law Angle of arrival Electrical and Electronic Engineering Physical and Theoretical Chemistry business |
| Zdroj: | Optics Communications. 277:241-246 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2007.05.018 |
| Popis: | We analyze the angle-of-arrival variance of an expanded and collimated laser beam once it has traveled through an indoor convective turbulence. A continuous position detector is set at the focus of a lens collecting the laser beam. The effect of the different turbulent scales, between the inner and the outer scales, is studied by changing the diameter of a circular pupil before the collector lens. The experimental optical setup follows the design introduced by Masciadri and Vernin [Appl. Opt., 36(6) (1997) 1320]. Tilt data measurements are studied using the fractional Brownian motion model for the turbulent wave-front phase introduced in a previous paper [Perez et al., J. Opt. Soc. Am. A 21(10) (2004) 1962]. The Hurst exponents associated to different strengths of turbulence are obtained from the here proposed D 2 H −2 dependence. |
| Databáze: | OpenAIRE |
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