We propose a new structure of broadband nearly-zero flattened dispersion highly nonlinear photonic crystal fiber (PCF). Through optimizing the diameters of the first two inner rings of air-holes and the GeO2 doping concentration of the core, the nonlinear coefficient is up to 47 W-1 km-1 at the wavelength of 1.55 \mum and nearly-zero flattened dispersion of \pm 0.5 ps/(nm km) is achieved in the telecommunication window (1460-1625 nm). Due to the use of GeO2-doped core, this innovative structure can offer not only a large nonlinear coefficient and broadband nearly-zero flattened dispersion but also low leakage losses.
© 2008 Chinese Optics Letters
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
Shuqin Lou, Hong Fang, Honglei Li, Tieying Guo, Lei Yao, Liwen Wang, Weiguo Chen, and Shuisheng Jian, "Design of broadband nearly-zero flattened dispersion highly nonlinear photonic crystal fiber," Chin. Opt. Lett. 6, 821-823 (2008)