Browsing by Author "Zhao, Chengliang"

Now showing 1 - 2 of 2

Propagation factors of laser array beams in turbulent atmosphere
(Taylor&Francis Ltd, 2010) Yuan, Yangsheng; Cai, Yangjian; Zhao, Chengliang; Eyyuboğlu, Halil T.; Baykal, Yahya; 7688; 7812
The propagation factors of phased locked laser array beams of radial and rectangular symmetries in a turbulent atmosphere are investigated based on the extended Huygens-Fresnel integral and the Wigner distribution function. Analytical propagation formulae for the propagation factors are derived and numerical examples are illustrated. We find that unlike their propagation invariant properties in free space, the propagation factors of laser array beams increase when propagating in turbulent atmosphere, and are closely related to the parameters of initial beams and the atmosphere
Radiation force of coherent and partially coherent flat-topped beams on a Rayleigh particle
(Optical Society of America, 2009) Zhao, Chengliang; Cai, Yangjian; Lu, Xuanhui; Eyyuboğlu, Halil T.; 7688
Propagations of coherent and partially coherent flat-topped beams through a focusing optical system are formulated. The radiation force on a Rayleigh dielectric sphere induced by focused coherent and partially coherent flat-topped beams is investigated theoretically. It is found that we can increase the transverse trapping range at the planes near the focal plane by increasing the flatness (i.e., beam order) of the flat-topped beam, and increase the transverse and longitudinal trapping ranges at the focal plane by decreasing the initial coherence of the flat-topped beam. Moreover the trapping stiffness of flat-topped beam becomes lower as the beam order increases or the initial coherence decreases. The trapping stability is also analyzed