Characterization of laser propagation through turbulent media by quantifiers based on the wavelet transform.

L. ZUNINO; D. PÉREZ; M. GARAVAGLIA; O. A. ROSSO

Fractals

World Scientific

Año: 2004 vol. 12 p. 223 - 234

0218-348X

The propagation of a laser beam through turbulent media is modeled as a fractional Brownian motion (fBm).  Time series corresponding to the center position of the laser spot (coordinates x and y) after traveling across air in turbulent motion, with different strength, are analyzed by the wavelet   theory.    Hurst exponents obtained are compared with Wavelet Entropy values.  In  the  present work  is  verified that  both  quantifiers (Hurst exponent and Wavelet  Entropy)  describe  the  degree  of order/disorder associated with the system. Within this framework, the Wavelet Entropy seems to distinguish the different level of turbulence for both coordinates.