Journal
OPTICS EXPRESS
Volume 19, Issue 17, Pages 16576-16592Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.19.016576
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- National Institute of Information and Communications Technology (NICT), Japan
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We designed and fabricated a multi-core fiber (MCF) in which seven identical trench-assisted pure-silica cores were arranged hexagonally. To design MCF, the relation among the crosstalk, fiber parameters, and fiber bend was derived using a new approximation model based on the coupled-mode theory with the equivalent index model. The mean values of the statistical distributions of the crosstalk were observed to be extremely low and estimated to be less than -30 dB even after 10,000-km propagation because of the trench-assisted cores and utilization of the fiber bend. The attenuation of each core was very low for MCFs (0.175-0.181 dB/km at 1550 nm) because of the pure-silica cores. Both the crosstalk and attenuation values are the lowest achieved in MCFs. (C) 2011 Optical Society of America
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