Journal
OPTICS EXPRESS
Volume 11, Issue 13, Pages 1503-1509Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.11.001503
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Photonic crystal fibers are highly attractive as nonlinear media as they combine a large nonlinear coefficient and a highly customizable zero dispersion wavelength - flexibility not found in any other medium. However, the high dispersion slope at the zero-dispersion wavelength demonstrated so far is very limiting to the useful bandwidth. We propose a new fiber design comprising a hybrid core-region with three-fold symmetry that enables unprecedented dispersion control while maintaining low loss and a high nonlinear coefficient. The lowest dispersion slope obtained is 1.10(-3)ps/(km.nm(2)) or one order of magnitude lower than for conventional slope reduced nonlinear fibers. The nonlinear coefficient is more than 11 (W.km)(-1) and loss below 7.9 dB/km at 1.55 mum has been achieved. (C) 2003 Optical Society of America.
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