Propagation of various dark hollow beams in a turbulent atmosphere
2006 (English)In: Optics Express, ISSN 1094-4087, Vol. 14, no 4, 1353-1367 p.Article in journal (Refereed) Published
Propagation of a dark hollow beam (DHB) of circular, elliptical or rectangular symmetry in a turbulent atmosphere is investigated. Analytical formulas for the average intensity of various DHBs propagating in a turbulent atmosphere are derived in a tensor form based on the extended Huygens-Fresnel integral. The intensity and spreading properties of the DHBs in a turbulent atmosphere are studied numerically. It is found that after a long propagation distance a dark hollow beam of circular or non-circular eventually becomes a circular Gaussian beam (without dark hollow) in a turbulent atmosphere, which is much different from its propagation properties in free space. The conversion from a DHB to a circular Gaussian beam becomes quicker and the beam spot in the far field spreads more rapidly for a larger structure constant, a shorter wavelength, a lower beam order and a smaller waist size of the initial beam.
Place, publisher, year, edition, pages
2006. Vol. 14, no 4, 1353-1367 p.
gaussian laser-beams, free-space, order, intensity, networks
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-15432ISI: 000235424400002OAI: oai:DiVA.org:kth-15432DiVA: diva2:333473
QC 201008312010-08-052010-08-052013-11-19Bibliographically approved