In this study , effects of variation in photonic crystal fibres׳ (PCFs) configuration on output intensity profiles were investigated for three significant telecomm wavelengths . In order to study the profiles , a Gaussian function was fitted on all obtained profiles with good agreement . The achievements show that while the amounts of air filling fraction and number of air rings were d/Λ= 0.4 and N=4 , respectively , increasing the number of edges in cladding region can not only rise the central intensity but also it can decrease the full width at half maximum (FWHM).

Keywords: photonic crystal fibre׳s with various configuration, central intensity, full width at half maximum, Gaussian function

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