Abstract： We numerically investigate the mode exciting properties of photonic crystal fibres by using the beam propagation method when the optical field is input from a traditional single mode fibre. The results show that both the excited mode spectrum and the coupling-efficiency of each excited mode depend on the normalized pitch Λ/λ and the normalized hole-size Λ/λ. Furthermore, we obtain the boundary profile of the optimizing coupling-efficiency for the excited fundamental mode: the boundary (Λ/λ)* is linear to the boundary (d\λ)*. All of these will pave the way for smoothing applications of photonic-crystal fibres, such as splicing and designing photonic-crystal-fibre functional devices.
LIU Jian-Guo;XUE Li-Fang;KAI Gui-Yun;LIU Yan-Ge;ZHANG Wei-Gang;LI Yan;WANG Zhi;ZHANG Chun-Shu;DONG Xiao-Yi. Mode Exciting Properties of Photonic Crystal Fibres with the Optical Field Incident from a Single Mode Fibre[J]. 中国物理快报, 2006, 23(8): 2125-2128.
LIU Jian-Guo, XUE Li-Fang, KAI Gui-Yun, LIU Yan-Ge, ZHANG Wei-Gang, LI Yan, WANG Zhi, ZHANG Chun-Shu, DONG Xiao-Yi. Mode Exciting Properties of Photonic Crystal Fibres with the Optical Field Incident from a Single Mode Fibre. Chin. Phys. Lett., 2006, 23(8): 2125-2128.
2006, Vol. 23 
