Highly Birefringence Low Loss Index Guiding Photonic Crystal Fiber with Differently Sized Air-Holes in Cladding

摘要

An analysis of highly birefringence low losses index-guiding photonic crystal fiber composed of differently sized circular air-holes in cladding and adjacent to the two elliptical air-holes x-direction in the first inner rings is carried out in this work using full-vector finite element method. The birefringence properties in terms of various parameters, e.g., pitch length; air-hole size and ellipticity ratio are calculated. Form the numerical results confirm that the size control of these air holes and pitch length is the key to reaching high model birefringence. The proposed structure at wavelength 1.55μm shows a birefringence of up to 3.02×10~(-2) and at the same time can get the confinement loss of less than 1.9×10~(-7)dB/m, which is a reference significance in useful to design temperature sensors.