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建立了空芯带隙型光子晶体光纤残余双折射理论分析模型,采用全矢量有限元法研究了光纤残余双折射产生的原因,最后搭建实验平台对空芯带隙型光子晶体光纤的残余双折射进行测试,并对光纤双折射的波长依赖性和温度稳定性进行了探究。仿真与实验结果表明,纤芯残余形变是导致残余双折射的重要因素,残余双折射随纤芯椭圆率的增大而增大,同时残余双折射的波长依赖性显著,温度依赖系数为0.3×10~(-9)/℃。
The model of residual birefringence of hollow-core photonic band gap photonic crystal fiber is established. The reason of residual birefringence of fiber is studied by full vector finite element method. Finally, the experimental platform is used to analyze the residual birefringence The tests were carried out and the wavelength dependence and temperature stability of the fiber birefringence were investigated. Simulation and experimental results show that the residual deformation of the core is an important factor leading to the residual birefringence. The residual birefringence increases with the increase of the ellipticity of the core while the wavelength dependence of the residual birefringence is significant. The temperature dependent coefficient is 0.3 × 10 ~ (-9) / ℃.