大模场单模增益光纤的研究进展  

Progress in large mode area and single mode gain fibers

作　　者：沈骁[1] 刘家喜 霍加磊 韦玮[1] SHEN Xiao;LIU Jia-Xi;HUO Jia-Lei;WEI Wei(College of Electronic and Optics Engineering, Nanjing University of Posts ＆ Telecommunications, Nanjing Jiangsu 210023 ,China)

机构地区：[1]南京邮电大学电子与光学工程学院,江苏南京210023

出　　处：《光电子．激光》2018年第7期797-804,共8页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61077070);江苏省高校自然科学基金(17KJB140018);江苏省自然科学基金(BK20150840);江苏省光通信工程技术研究中心(ZXF20170301);南京邮电大学基金(NY215142)资助项目

摘　　要：高功率光纤激光器的发展面临着各种非线性效应和输出模式和功率不稳定等技术瓶颈,而大模场单模光纤被认为是解决该类问题的主要手段。本文系统总结了各种典型的大模场单模增益光纤,阐述了各种光纤的结构特点以及实现原理,重点分析了光纤的模场面积、输出功率、抗弯曲特性、激光光束质量和制备难度等几项关键指标。最后介绍了作者最新设计的新型异质包层螺旋侧漏大模场单模光纤结构模型及其实现路径,该光纤芯径在50~200μm范围内具有可调控性,且制备相对简单,有望成为大模场单模光纤发展的一个新的方向。The development of high power fiber lasers is faced with many technical bottlene cks,such as various nonlinear effects and unstable output modes and power etc.,b ut fortunately,large mode area and single-mode fibers are considered to be the main method to solve such problems.This paper summarizes the various typical lar ge mode area and single-mode fiber,expounds the structure characteristics and the realization principle of various fiber,focuses on t he key index such as the mode field area,output power,bending resistance characteristics,laser beam quality and fabrication difficulty,etc.The practical application value and the various deficiencies of various large mode area and single-mode fiber are obtained,which will provide an important reference for the related research and design of the large mode area and single mode fiber.Finally,a new type of large mode area and single mode gain fiber with helical hetero-cladding designed by the author thermselves is introduced in detail.The fiber core diameter can be adjusted flexibly in the range of 50-200μm.and compared with many other fibers,this kind of fiber is also rel atively easy to fabrication,thus,it is expected to be a new research direction in large mode area fiber field.

关 键 词：高功率光纤激光器 大模场单模增益光纤 异质包层螺旋光纤 抗弯曲特性 

分 类 号：O439[机械工程—光学工程]