Journal
OPTICS LETTERS
Volume 38, Issue 23, Pages 5118-5121Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.38.005118
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Funding
- Defense Advanced Research Projects Agency (DARPA) under the InPho (Information in a Photon) program
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Light beams can carry orbital angular momentum (OAM) such that a helical phase front twists along the direction of propagation. OAM beams have been demonstrated in a wide variety of applications and have been found to offer a new orthogonal degree of freedom for multiplexing independent data streams for high-capacity point-to-point optical communications. However, to enable their efficient use in reconfigurable networks, approaches must be developed to manipulate OAM beams. We demonstrate OAM-based reconfigurable optical switching functions among multiple OAM beams. Selective data switching among three 100 Gb/s quadrature phase-shift keying OAM channels was achieved with a 2.1 dB optical signal-to-noise ratio penalty. The scheme of selective OAM-beam manipulation can be potentially cascaded to realize an arbitrary n x n switching function. (C) 2013 Optical Society of America
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