Study on the non-paraxial beam parameters of single-mode fiber

作     者：Lianhuang Li * , Fuyuan Guo Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education Fujian Provincial Key Laboratory for Photonics Technology Institute of Laser and Optoelectronics Technology, Fujian Normal University, Fuzhou 350007, P. R. China 

会议名称：《2010亚洲光电子会议信息光学和光存储技术分会场》

会议日期：2010年

学科分类：070207[理学-光学] 07[理学] 0702[理学-物理学] 

基　　金：supported by the Natural Science Fund of Fujian Province under Grant No 2009J01275 the Program of Fujian Education Department under Grant No JB09069 

关 键 词：Fiber optics beam parameters non-paraxial vectorial moment theory 

摘      要：Based on the non-paraxial vectorial moment theory of light beam propagation and waveguide mode theory, the beam parameters of single-mode fiber including mode-field radius, divergence half-angle and beam propagation factor are analyzed and calculated. Especially, the results of beam propagation factor show that if both the core and cladding layer fields are considered, M 2 1 is always obtained and neglect of the cladding layer field will lead to M 2 1. These conclusions may be useful for further research on beam quality of fiber laser beam.