熊猫光纤制作的新方法和应力双折射的研究  

A New Method to Fabricate Panda Fiber and Research on the Stress Induced Birefringence

作　　者：卫延[1] 常德远[1] 郑凯[1] 魏淮[1] 傅永军[1] 简水生[1] 

机构地区：[1]北京交通大学光波技术研究所,北京100044

出　　处：《光电子．激光》2007年第9期1029-1032,共4页Journal of Optoelectronics·Laser

基　　金：国家"863"计划资助项目(2002AA312190)

摘　　要：提出了一种制作偏振保持光纤(PMF)的预制棒侧向开槽法,制作了波长1550nm处双折射为7.75×10-5的边孔光纤和双折射为5.345×10-4的单模熊猫光纤。用有限元法分析熊猫光纤应力分布表明,掺B应力施加区(SAP)的引入使得光纤横截面上出现了应力分量的拉应力区和压应力区;在纤芯以及其附近区域应力的x分量取正值,y分量取负值,造成了大应力差;SAP距离纤芯越近,双折射越大,距离一定时,对纤芯中心张角为90°时双折射最大。A new method to fabricate polarizatiorrrnaintaining optical fiber is presented which is called fiber preform sidegroove method. A side-hole fiber with birefringence of 7.75 × 10^-5 and a panda fiber with birefringence of 5. 345 × 10^-4 at wavelength 1 550 nm are fabricated by this method. The stress distribution in the cross-section of panda fiber is analyzed by the finiteelement method. The tension stress zone and compression stress zone of stress components appear in the cross-section because of the sress applying parts（SAP）. In the core and its adjacent zone,stress component of z direction is plus,strss component of y direction is negative,which leads to a big stress difference. A higher birefringence is achieved as the SAPs are more close to the core and the flare angle of SAP to the core center is more close to 90 degrees.

关 键 词：光纤光学 偏振保持光纤(PMF) 熊猫光纤 边孔光纤 应力双折射 有限元法 

分 类 号：TN253[电子电信—物理电子学]