工作在1550nm的全固态光子晶体光纤的设计

利用全矢量平面波展开法对三角形排布孔包层-圆纤芯结构的光子晶体光纤的光子带隙特性进行了数值模拟,对比研究了传统光子晶体光纤(空气-石英纤芯结构)和全固态光子晶体光纤(非空气-石英纤芯结构)的光子带隙(导模)与结构参数(包层孔直径dclh、包层孔间距和包层孔填充比f)的关系,设计出了一组合适的结构参数(纤芯直径dco＝5.3 m,包层孔材料的折射率nclh=1.65,dclh＝1.0 m,＝2.0 m,f＝0.7),可以使相应的全固态光子晶体光纤工作在1 550 nm的现代光通信波长上,且光子带隙可以达100 nm.

Design of an all-solid-state photonic crystal fiber operating at wavelength 1 550 nm

Numerical simulations were performed on the photonic band gap (PBG) properties of the photonic crystal fibers(PCFs) possessing a clad with the cladding holes triangle-lattice distributed and a round fiber core using the full-vector plane-wave expansion method. Through the comparative analysis on the relationship of the PBG property and the structure parameters(cladding hole diameter dclh, cladding hole pitch and cladding hole filling ration f) between traditional(air-silica) and all-solid-state(nonair-silica) PCFs, a design of an all-solid-state PCF was given out which operates at the communication wavelength of 1 550 nm with the parameters dclh=1.0 m, =2.0 m and f=0.23 at the conditions of fiber core diameter dco=5.3 m and cladding hole material's refractive index nclh=1.65. Further numerical simulation shows that this resulting PCF has a gap width up to 43 nm.