Analysis and Optimization of Splice-Joint Attenuation of Single-Mode Fibers and Photonic Crystal Fibers Based Devices in Optical Communication Networks

Due to expansion of photonic crystal fiber (PCF) based optical devices in optical communication networks, the connection process between conventional optical fibers (COF) as transmission medium and these devices has attracted the researchers. Considering the splice joint between the COF and PCF, in this paper, the fundamental core and cladding modes are analyzed by scalar effective index method (SEIM) and vectorial effective index method (VEIM), and the results are compared with finite difference frequency domain (FDFD) method. Then by using Gaussian approximation, the effects of bending and transverse misalignment at splice joint are analyzed. Based on the obtained results, for the first time, an approach to optimize the attenuation of the splice joint between dissimilar optical fibers is presented.