Analysis of the Confinement Loss and Birefringence of Index-Guided Photonic Crystal Fibres (PCF) in the Visible Spectrum
نویسندگان
چکیده
This paper presents a comparative study of confinement ability of two 4-ring hexagonal lattice indexguided PCFs with different air-hole spacing (pitch) in the visible spectrum. From analysis and comparison of the two optimized PCF structures, it can be investigated that the confinement loss is very low in the structure designed with d/ Λ =0.5 and Λ =1.4μm, where the light is single mode and confined in the core for the visible region (400700)nm. A low confinement loss and low birefringence of the order of 10and 10 respectively are obtained for this PCF. Also the effective area is found to be nearly 2-3μm and nonlinearity coefficient as 198-82kmw,extremely high confinement ability in the visible range and non-linearity makes it promising for non-linear and sensing
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