Beam wander characteristics of cos and cosh-Gaussian beams

Temporal spectrum of beam wander for Gaussian Schell-model beams propagating in atmospheric turbulence with finite outer scale

“…Considerable effort has been devoted to the formulation of beam-wander variance for various types of optical beams [1][2][3][4][5][6]; the effect of the partial coherence of the source on the beam-wander variance was also studied by Berman et al [7], followed by Xiao and Voelz [8] and Yu et al [9]. The dynamics of beam wander are manifested in their temporal spectra.…”

Performance evaluation of aeronautical uplink/downlink free-space optical communication system with adaptive optics over gamma–gamma turbulence channel

“…the received irradiance fluctuations of the optical wave [4,5]. Beam spread [6,7] and the wander of the light beam over detector aperture [8,9] are also reported.…”

Experimental study of turbulence-induced beam wander and deformation of a partially coherent beam

“…Beam wander refers to the random displacement of the center of a laser beam in the receiver plane, and one usually uses the parameter named root mean square (RMS) of the beam centroid to characterize the beam wander effect. Beam wander of various beams in turbulent atmosphere have been investigated in [2,[18][19][20][21][22][23][24][25], and those authors discovered that, in theory, using a laser beam with controlled amplitude (i.e., beam profile), phase, polarization, and coherence can decrease the turbulence-induced beam wander. In this Letter, we carry out an experimental study of the beam wander and the deformation of a typical partially coherent beam named Gaussian Schell-model (GSM) beam propagating through thermally induced turbulence.…”

“…For the case τ d ≪ τ s ≪ τ a , the BPA is regarded as a "fast" detector. In most of the previous theoretical studies on the beam wander of a laser beam in the turbulent atmosphere [19][20][21][22][23][24][25], the detector is assumed to be a "slow" detector. In our experiment, the measured value of the characteristic time τ s varies from 6.9 to 14 μs when the coherence width varies from 0.06 to 1.2 mm, and the measured value of the characteristic time τ a varies from 50 to ∼65 ms when the temperature of the hot plate varies from 80°C to 160°C.…”