应用有限元方法对领结型和椭圆型保偏光纤的热应力双折射特性和模式双折射进行了分析,给出了这两种保偏光纤的应力和双折射分布规律.对领结型保偏光纤,研究了纤芯的双折射和模式双折射随着应力区离纤芯距离的变化规律;对椭圆型保偏光纤,研究了纤芯的应力双折射和模式双折射随包层椭圆度的变化规律;分析了光纤应力区结构对纤芯双折射大小和均匀性的影响,并将应力诱导双折射与模式理论计算结果进行了比较.
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