基于热极化双孔光纤的电调谐光纤光栅  

Research on Electrically Tunable Fiber Bragg Grating Based on Thermally Poled Twin-hole Fiber

作　　者：郭燕[1] 任国斌[1] 黄琳[1] 

机构地区：[1]北京交通大学全光网与现代通信网教育部重点实验室,北京100044

出　　处：《光电技术应用》2015年第6期75-79,共5页Electro-Optic Technology Application

基　　金：国家自然科学基金(61178008)资助的课题;中央高校基本科研业务费专项基金(2011RC050)资助的课题

摘　　要：基于热极化光纤设计了电调谐光纤布拉格光栅。通过光纤热极化二维载流子模型分析了热极化致内建电场的形成。结合紫外光在热极化光纤二阶非线性周期性擦除以及在光纤光栅制作中的作用,设计了周期性极化的布拉格光纤光栅。研究结果表明,利用非线性擦除区域与非线性区域电致折射率改变的不同,调节光栅的折射率差,可以实现电调谐光纤光栅。针对电调谐光纤光栅,研究了一定电压下初始折射率差、光栅长度对反射率的影响。文中结论对于光纤光栅在全光纤器件方面的应用具有重要参考价值。An electrically tunable fiber Bragg grating based on thermally poled twin-hole fiber is designed. Theformation of frozen-in electric field during thermal poling is analyzed based on the two-dimensional charge dynam-ics model. A periodically poled Bragg fiber grating is designed based on the role of ultraviolet light in the second-or-der nonlinearity（SON） periodically erasing of thermally poled fiber and the fiber grating manufacturing. The tunabil-ity is achieved as the variation responses of refractive indices to modulating voltage in SON erased zone and SONzone are different. The influence of the initial refractive index and the length of the grating on the tunability are alsoinvestigated. The electrically tunable thermally poled fiber Bragg grating has important reference value for the appli-cation of fiber Bragg grating and thermally poled optical fiber in active optical devices.

关 键 词：热极化 光纤光栅 调制 

分 类 号：TN386.4[电子电信—物理电子学]