TY - GEN
T1 - Behavior of the laser beam wandering with the turbulent path length
AU - Funes, Gustave
AU - Gulich, Damián
AU - Zunino, Luciano
AU - Pérez, Dario G.
AU - Garavaglia, Mario
PY - 2006
Y1 - 2006
N2 - We experimentally study the variance of the transverse displacement (wandering) of a laser beam after it has traveled through indoor artificially convective turbulence. In a previous paper (Opt. Comm., Vol. 242, No 1-3, pp. 76-63, November 2004) we have modeled the atmospheric turbulent refractive index as a fractional Brownian motion. As a consequence, a different behavior is expected for the wandering variance. It behaves as L2+2H, where L is the propagation length and H the Hurst exponent associated to the fractional Brownian motion. The traditional cubic dependence is recovered when H = 1/2 - the ordinary Brownian motion. That is the case of strong turbulence or long propagation path length. Otherwise, for weak turbulence and short propagation path length some deviations from the usual expression should be found. In this presentation we experimentally confirm the previous assertion.
AB - We experimentally study the variance of the transverse displacement (wandering) of a laser beam after it has traveled through indoor artificially convective turbulence. In a previous paper (Opt. Comm., Vol. 242, No 1-3, pp. 76-63, November 2004) we have modeled the atmospheric turbulent refractive index as a fractional Brownian motion. As a consequence, a different behavior is expected for the wandering variance. It behaves as L2+2H, where L is the propagation length and H the Hurst exponent associated to the fractional Brownian motion. The traditional cubic dependence is recovered when H = 1/2 - the ordinary Brownian motion. That is the case of strong turbulence or long propagation path length. Otherwise, for weak turbulence and short propagation path length some deviations from the usual expression should be found. In this presentation we experimentally confirm the previous assertion.
KW - Fractional brownian motion
KW - Hurst exponent
KW - Indoor convective turbulence
KW - Laser beam wandering variance
UR - http://www.scopus.com/inward/record.url?scp=33846229341&partnerID=8YFLogxK
U2 - 10.1117/12.723051
DO - 10.1117/12.723051
M3 - Conference contribution
AN - SCOPUS:33846229341
SN - 0819466425
SN - 9780819466426
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Thirteenth Joint International Symposium on Atmospheric and Ocean Optics/ Atmospheric Physics
T2 - Thirteenth Joint International Symposium on Atmospheric and Ocean Optics/ Atmospheric Physics
Y2 - 2 July 2006 through 7 July 2006
ER -