Bozinovic, NenadKristensen, PoulRamachandran, Siddharth2011-07-212013-04-182011-07-21https://hdl.handle.net/2144/1436We use specialty fiber (“vortex fiber”), to create and propagate orbital angular momentum states over ~kilometer lengths in telecom band (~1550nm). The spiral phase structure of the vortex beams was confirmed by interference with a Gaussian reference. This result is an important step toward achieving long-range classical and quantum communication links using orbital angular momentum of light.en-USOptical vorticesQuantum communicationPolarization-selective devicesImage