偏振控制法紫外写入Bragg光纤光栅的特性分析  

The advance of polarization control method to ultraviolet-written Bragg gratings

作　　者：饶明辉[1] 何振江[1] 杨冠玲[1] 艾锦云[1] 

机构地区：[1]华南师范大学物理系,广州510631

出　　处：《激光技术》2004年第1期61-64,共4页Laser Technology

摘　　要：结合目前常用光纤布喇格光栅制作方法 ,详述了一种更加灵活、简单而又有效的制作光纤布喇格光栅的方法 ,即偏振控制法。该方法是基于 :在紫外光s和 p偏振方向诱导而成的两个折射率调制剖面之间形成一个π相移 ,通过改变两个偏振方向上光强比例 ,就能够控制调制量和诱导相移。它的优点是写入的光栅具有多相移和不均匀切趾剖面的特点 。A flexible and simple method for UV writing of Bragg gratings and polarization control method,is presented.The method is based on a phase shift between the refractive index modulation profiles induced by s and p polarization of UV light.The modulation strength is able to be controlled and phase shifts are induced by changing the ratio of UV intensity in the two polarizations.Characteristics of spectrum of two written gratings are analysed,in good agreement with theoretical predictions.

关 键 词：偏振 相移 变迹 光纤布喇格光栅 

分 类 号：TN253[电子电信—物理电子学]