Mr. Damián Gulich Profile

Damián Gulich

Doctoral fellow of CONICET at CIOp at Ctr de Investigaciones Opticas

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Proceedings Article | 17 October 2013 Paper

Characterizing inertial and convective optical turbulence by detrended fluctuation analysis

Darío Pérez, Gustavo Funes, Luciano Zunino, Damián Gulich, Eduardo Figueroa

Proceedings Volume 8890, 889016 (2013) https://doi.org/10.1117/12.2028698

KEYWORDS: Turbulence, Atmospheric propagation, Optical turbulence, Laser beam propagation, Sensors, Geometrical optics, Fractal analysis, Atmospheric optics, Atmospheric turbulence, Refractive index

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Proceedings Article | 25 September 2013 Paper

Multifractality and the effect of turbulence on the chaotic dynamics of a HeNe laser

Damián Gulich, Luciano Zunino, Darío Pérez, Mario Garavaglia

Proceedings Volume 8874, 88740J (2013) https://doi.org/10.1117/12.2023708

KEYWORDS: Turbulence, Helium neon lasers, Atmospheric turbulence, Gas lasers, Telecommunications, Lanthanum, Laser systems engineering, Chaos, Atmospheric propagation, Laser communications

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Proceedings Article | 1 November 2012 Paper

Retrieving atmospheric turbulence features from differential laser tracking motion data

Darío Pérez, Damián Gulich, Ángel Férnandez, Luciano Zunino, Gustavo Funes

Proceedings Volume 8535, 853508 (2012) https://doi.org/10.1117/12.974652

KEYWORDS: Turbulence, Sensors, Beam splitters, Atmospheric propagation, Error analysis, Atmospheric turbulence, Laser beam propagation, Data modeling, Refractive index, Optical turbulence

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We have previously introduced the Differential Laser Tracking Motion Meter (DLTMM) [Proc. SPIE 7476, 74760D (2009)] as a robust device to determine many optical parameters related to atmospheric turbulence. It consisted of two thin laser beams—whose separations can be modified—that propagate through convective air, then each random wandering was registered with position detectors, sampled at 800 Hz. The hypothesis that the analysis of differential coordinates is less affected by noise induced by mechanical vibration was tested. Although we detected a trend to the Kolmogorov’s power exponent with the turbulence increasing strength, we were unable to relate it to the Rytov variance. Also, analyzing the behaviour of the multi-fractal degree estimator (calculated by means of multi-fractal detrended fluctuation analysis, MFDFA) at different laser-beam separations for these differential series resulted in the appreciation of characteristic spatial scales; nevertheless, errors induced by the technique forbid an accurate comparison with scales estimated under more standard methods. In the present work we introduce both an improved experimental setup and refined analyses techniques that eliminate many of the uncertainties found in our previous study. A new version of the DLTMM employs cross-polarized laser beams that allows us to inspect more carefully distances in the range of the inner-scale, thus even superimposed beams can be discriminated. Moreover, in this experimental setup the convective turbulence produced by electrical heaters previously used was superseded by a chamber that replicates isotropic atmospheric turbulence—anisotropic turbulence is also reproducible. Therefore, we are able to replicate the same state of the turbulent flow, specified by Rytov variance, for every separation between beams through the course of the experience. In this way, we are able to study the change in our MFDFA quantifiers with different strengths of the turbulence, and their relation with better known optical quantities. The movements of the two laser beams are recorded at 6 kHz; this apparent oversampling is crucial for detecting the turbulence’s characteristics scales under improved MFDFA techniques. The estimated characteristic scales and multi-fractal nature detected by this experiment provides insight into the non-Gaussian nature of propagated light.

Proceedings Article | 1 October 2009 Paper

Turbulence characterization by studying laser beam wandering in a differential tracking motion setup

Gustavo Funes, Luciano Zunino, Damián Gulich, Darío Pérez, Mario Garavaglia

Proceedings Volume 7476, 74760D (2009) https://doi.org/10.1117/12.830234

KEYWORDS: Turbulence, Sensors, Anisotropy, Laser beam propagation, Atmospheric propagation, Statistical analysis, Beam splitters, Mirrors, Lanthanum, Motion estimation

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Proceedings Article | 1 November 2006 Paper

Behavior of a laser beam wandering with turbulent path length

Gustavo Funes, Luciano Zunino, Mario Garavaglia, Damián Gulich, Darío Pérez

Proceedings Volume 6522, 65220M (2006) https://doi.org/10.1117/12.723051

KEYWORDS: Turbulence, Atmospheric propagation, Refractive index, Atmospheric modeling, Laser beam propagation, Lanthanum, Motion models, Geometrical optics, Atmospheric optics, Atmospheric physics

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Proceedings Article | 1 November 2006 Paper

Angle-of-arrival variance behavior and scale filtering in indoor turbulence

Darío Pérez, Damián Gulich, Gustavo Funes, Luciano Zunino, Mario Garavaglia

Proceedings Volume 6522, 65220L (2006) https://doi.org/10.1117/12.723049

KEYWORDS: Turbulence, Collimation, Motion models, Lanthanum, Sensors, Stochastic processes, Fractal analysis, Data modeling, System on a chip, Americium

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Showing 5 of 6 publications

Conference Committee Involvement (1)

Encuentro de Estudiantes de Óptica y Fotofisica (EEOF) 2012

21 May 2012 |

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