Journal
SCIENCE
Volume 340, Issue 6140, Pages 1545-1548Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1237861
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Funding
- Defense Advanced Research Projects Agency-InPho program
- Chief Scientist Office of the Israeli Ministry of Industry, Trade and Labor within the Tera Santa consortium
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Internet data traffic capacity is rapidly reaching limits imposed by optical fiber nonlinear effects. Having almost exhausted available degrees of freedom to orthogonally multiplex data, the possibility is now being explored of using spatial modes of fibers to enhance data capacity. We demonstrate the viability of using the orbital angular momentum (OAM) of light to create orthogonal, spatially distinct streams of data-transmitting channels that are multiplexed in a single fiber. Over 1.1 kilometers of a specially designed optical fiber that minimizes mode coupling, we achieved 400-gigabits-per-second data transmission using four angular momentum modes at a single wavelength, and 1.6 terabits per second using two OAM modes over 10 wavelengths. These demonstrations suggest that OAM could provide an additional degree of freedom for data multiplexing in future fiber networks.
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