The dispersion compensation properties of dual-concentric core photonic crystal fibers are theoretically investigated in this letter. The effects of geometric structure on the dispersion properties of dual-concentric ...The dispersion compensation properties of dual-concentric core photonic crystal fibers are theoretically investigated in this letter. The effects of geometric structure on the dispersion properties of dual-concentric core photonic crystal fibers are carefully studied by finite element method. The first layer of holes around the core area is enlarged in a new manner with the near-core point fixed. Considering the tradeoff among several parameters, results show that the dispersion compensation wavelength and strength can be tuned to desired values by constructing an appropriate design of the geometric structure of photonic crystal fibers.展开更多
We present a new structure of nearly-zero flattened dispersion and highly nonlinear photonic crystal fiber （PCF） in the telecommunication window. This fiber design is comprised of a hybrid-core region with bismuth-d...We present a new structure of nearly-zero flattened dispersion and highly nonlinear photonic crystal fiber （PCF） in the telecommunication window. This fiber design is comprised of a hybrid-core region with bismuth-doped region in the center and three lower bismuth-doped regions in the first ring that enables dispersion control while maintaining a high nonlinear coefficient. Numerical analysis results show that the proposed PCF is achieved with a nonlinear coefficient of about 3301 W ^-1 km^-1, a dispersion value of about 0.5537 ps/（nm.km） at 1550 nm, and nearly-zero flattened dispersion fluctuating within 2.5 ps/（nm.km） ranging from 1.496 to 1.596 μm.展开更多
基金supported by the National"863"Program of China(No.2013AA031501)the Fundamental Research Funds for the Central Universities of China(No.2012RC0402)
文摘The dispersion compensation properties of dual-concentric core photonic crystal fibers are theoretically investigated in this letter. The effects of geometric structure on the dispersion properties of dual-concentric core photonic crystal fibers are carefully studied by finite element method. The first layer of holes around the core area is enlarged in a new manner with the near-core point fixed. Considering the tradeoff among several parameters, results show that the dispersion compensation wavelength and strength can be tuned to desired values by constructing an appropriate design of the geometric structure of photonic crystal fibers.
基金supported by the National "863" Program of China under Grant No.2013AA031501
文摘We present a new structure of nearly-zero flattened dispersion and highly nonlinear photonic crystal fiber （PCF） in the telecommunication window. This fiber design is comprised of a hybrid-core region with bismuth-doped region in the center and three lower bismuth-doped regions in the first ring that enables dispersion control while maintaining a high nonlinear coefficient. Numerical analysis results show that the proposed PCF is achieved with a nonlinear coefficient of about 3301 W ^-1 km^-1, a dispersion value of about 0.5537 ps/（nm.km） at 1550 nm, and nearly-zero flattened dispersion fluctuating within 2.5 ps/（nm.km） ranging from 1.496 to 1.596 μm.
