We study the evolution of OAM states in fibers, showing that they can be maintained over km-lengths with purity levels exceeding 94%. This suggests a novel means for encoding information in fiber-based quantum encryption links.
© 2011 OSA
N. Bozinovic, P. Kristensen, and S. Ramachandran, "Are Orbital Angular Momentum (OAM/Vortex) States of Light Long-Lived in Fibers?," in Frontiers in Optics 2011/Laser Science XXVII, OSA Technical Digest (Optical Society of America, 2011), paper LWL3.
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