Calculation and Design of Photonic Crystal Fibers with Broadband Flattened Dispersion Property Around 1.55 μm

Photonic crystal fibers,also referred to as holey fibers or microstructured optical fibers,are the generic term for a new class of all silica optical fibers whose cladding typically comprises a hexagonal array of air holes running along the entire length.From the theory of fundamental space-filling mode of photonic crystal fibers(PCFs),the PCFs with broadband flattened dispersion property around the telecommunication window(around 1.55 μm) are investigated by a full vectorial effective index method in this paper.The total dispersion of photonic crystal fibers is obtained by summing up material dispersion and waveguide dispersion.Using the normalized property of waveguide dispersion,the photonic crystal fibers(PCFs) with more than one hundred or even several hundred nanometers broadband ultra-flattened normal,anomalous,and zero dispersion property around 1.55 μm coere designed.