基于圆对称径向双折射的径向偏振场光纤  

Radially Polarized Field Fiber Based on Circularly Symmetric Radial Birefringence

作　　者：朱方祥 陈浩[1] 尹金德[1] 王金涛 闫培光[1] 韦会峰 何飞 陈抗抗 于洋 Zhu Fangxiang;Chen Hao;Yin Jinde;Wang Jintao;Yan Peiguang;Wei Huifeng;He fei;Chen Kangkang;Yu Yang(Shenzhen Key Laboratory of Laser Engineering,College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen,Guangdong518060,China;YSL Photonics,Wuhan,Hubei 430000,China;College of Liberal Arts and Sciences,National University of Defense Technology,Changsha,Hunan 410073,China)

机构地区：[1]深圳大学物理与光电工程学院深圳市激光工程重点实验室,广东深圳518060 [2]武汉安扬激光技术有限责任公司,湖北武汉430000 [3]国防科技大学文理学院,湖南长沙410073

出　　处：《中国激光》2020年第1期53-59,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(61775146,61805278);中国博士后科学基金(2018M633704);深圳市科技计划(JCYJ20160520161351540)。

摘　　要：当面向高功率径向偏振场激光的产生和传导时,在光纤内实现高的模式区分度与大的模场面积一直是核心的技术挑战。基于此,提出一种全新的径向偏振场光纤设计方案,通过在纤芯内部引入圆对称的径向分布热应力场,使得纤芯内形成径向双折射效应,有效打破常规光纤中偏振模式之间的简并,使TM01模、TE01模和HE21模的有效折射率差为10-4量级,从而将TM01径向偏振模区分出来。同时,此类径向偏振场光纤更易实现TM01模场的大模面积设计。High mode discrimination and large mode area in fibers are key technical challenges for the generation and transmission of high-power radially polarized field(RPF)laser.Based on this,a novel method for the design of a radially polarized field fiber is proposed.By introducing a circularly symmetrical radially distributed thermal stress field into the core of the fiber,a radial birefringence effect can be realized in the core,which effectively breaks the degeneracy between polarization modes in conventional optical fibers.The effective index difference among TM01,TE01,and HE21 modes is of the order of 10-4.This allows the TM01radial polarization mode to be separated.In addition,a large mode area design for the TM01 mode field can be achieved by using the proposed RPF fiber.

关 键 词：光学器件 径向偏振场 应力双折射 光纤 

分 类 号：TN253[电子电信—物理电子学] TN248.1