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10 September 2007 Novel high nonlinear bismuth-based photonic crystal fiber
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We have developed novel bismuth-based photonic crystal fiber which exhibits high nonlinearity γ ~ 780W-1km-1 and relatively low group-velocity-dispersion D ~ -25 ps/nm/km at 1560 nm. The new fabrication process was also developed for this novel photonic crystal fiber with 6-fold symmetric structure. The core diameter 2.7 μm of this fiber was designed to have modelately decreased normal dispersion and high nonlinearity. Spectral broadening induced by self-phase-modulation by 1550 nm fs-pulse propagation shows that the high nonlinearity and dispersion reduction is simultaneously achieved.
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Tomoharu Hasegawa, Tatsuo Nagashima, Seiki Ohara, and Naoki Sugimoto "Novel high nonlinear bismuth-based photonic crystal fiber", Proc. SPIE 6775, Active and Passive Optical Components for Communications VII, 677509 (10 September 2007);

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