Bend-Induced Distortion in Large Mode Area Holey Fibre
TAN Xiao-Ling, GENG You-Fu, ZHANG Tie-Li, WANG Wei-Neng, WANG Peng, YAO Jian-Quan
College of Precision Instrument and Optoelectronics Engineering, Institute of Laser and Optoelectronics, Tianjin University, Tianjin 300072Key Laboratory of Optoelectric Information Science and Technology of Ministry of Education, Tianjin University, Tianjin 300072
Bend-Induced Distortion in Large Mode Area Holey Fibre
TAN Xiao-Ling;GENG You-Fu;ZHANG Tie-Li;WANG Wei-Neng;WANG Peng;YAO Jian-Quan
College of Precision Instrument and Optoelectronics Engineering, Institute of Laser and Optoelectronics, Tianjin University, Tianjin 300072Key Laboratory of Optoelectric Information Science and Technology of Ministry of Education, Tianjin University, Tianjin 300072
摘要A simplified scheme of bend-induced mode distortion is introduced into bent holey fibres, the distorted mode distribution and mode effective area reduction are investigated using the finite difference method. Numerical results show that the modes of bent holey fibres with small bend radius shift away from the core and are deformed greatly, and the mode areas drop significantly as the bend radius decreases, which severely affects the fibre laser performance. The propagation characteristics of bent holey fibres at given wavelength are determined by fill factor and normalized bend radius. Finally, the transition normalized bend radius that represents the location of the mode area beginning to fall off is obtained.
Abstract：A simplified scheme of bend-induced mode distortion is introduced into bent holey fibres, the distorted mode distribution and mode effective area reduction are investigated using the finite difference method. Numerical results show that the modes of bent holey fibres with small bend radius shift away from the core and are deformed greatly, and the mode areas drop significantly as the bend radius decreases, which severely affects the fibre laser performance. The propagation characteristics of bent holey fibres at given wavelength are determined by fill factor and normalized bend radius. Finally, the transition normalized bend radius that represents the location of the mode area beginning to fall off is obtained.
TAN Xiao-Ling;GENG You-Fu;ZHANG Tie-Li;WANG Wei-Neng;WANG Peng;YAOJian-Quan. Bend-Induced Distortion in Large Mode Area Holey Fibre[J]. 中国物理快报, 2008, 25(5): 1661-1663.
TAN Xiao-Ling, GENG You-Fu, ZHANG Tie-Li, WANG Wei-Neng, WANG Peng, YAOJian-Quan. Bend-Induced Distortion in Large Mode Area Holey Fibre. Chin. Phys. Lett., 2008, 25(5): 1661-1663.
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2008, Vol. 25 
