Journal
OPTICS LETTERS
Volume 34, Issue 2, Pages 142-144Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.34.000142
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- United States Air Force Office of Scientific Research (USAFOSR)
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We analyze the influence of atmospheric turbulence on the propagation of an optical vortex beam having the form V(r, theta)=A(0)e(im theta). The probability that a detected photon after propagating through the atmosphere has the same value of the orbital angular momentum as the launched photon is found to be given by < so >=[1+(1.845D/r(0))(2)](-1/2), where D is the aperture diameter and r(0) is the Fried coherence diameter. These vortex beams behave very similarly to Laguerre-Gauss beams under the influence of atmospheric turbulence. These results have important implications for atmospheric laser communication systems that employ quantum encryption. (C) 2009 Optical Society of America
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