熔嵌式多芯中空光纤制备方法及其双折射特性  

Preparation and Birefringence Properties of the Embedded Multi-Core Hollow Fiber

作　　者：赵恩铭[1] 苑立波[1] 田凤军[1] 杨元元[1] 

机构地区：[1]哈尔滨工程大学理学院,黑龙江哈尔滨150001

出　　处：《光学学报》2013年第2期49-53,共5页Acta Optica Sinica

基　　金：国家自然科学基金(61007053;60927008;61205027;61077062;61077062);中央高校基础研究基金(HEUCF20111105);教育部博士点基金(20092304120022)资助课题

摘　　要：设计并制造了一种熔嵌式多芯高双折射中空光纤。由于该结构光纤中纤芯和包层的几何非对称性,因而具有高双折射的特性,可用于克服纤内集成干涉仪的偏振衰退问题。利用有限元法分析了不同尺寸下模式双折射的变化情况,得出了增加纤芯长轴长度或减小内包层厚度可有效提高双折射的结论,并在1310nm波长处得到1.42×10-4的模式双折射。实验及分析结果表明,熔嵌式多芯高双折射中空光纤在纤内集成干涉仪的消偏振衰落方面具有一定的应用潜力,可用于制作具有保偏功能的纤内集成干涉仪。An embedded multi-core hollow high birefringence fiber is designed and fabricated. Since the structure of the optical fiber core and the cladding is geometric asymmetric, it has high birefringence characteristic which can be used to overcome the problems of the polarization-induced fading of the fiber integrated interferometer. Using the finite element method to analyze the mode birefringence changes in different sizes, it can be concluded that increasing the length of the major axis of the core, or reducing the thickness of the inner cladding can effectively improve the birefringence. And the mode birefringence of 1.42 ×10-4 at 1310 nm is obtained. Experimental and analytical results show that the embedded multi-core hollow high birefringence fiber has a certain potential in in-fiber integrated interferometers for reducing polarization-induced fading and can be used to manufacture in-fiber integrated interferometer with polarization-maintaining function.

关 键 词：光纤光学 保偏光纤 多椭圆芯 偏振衰落 干涉仪 

分 类 号：O436[机械工程—光学工程]