基于结构性改变PCFG的制备工艺研究  

Study on fabrication of photonic crystal fiber grating based on strctural change

作　　者：齐跃峰[1] 乔汉平[1] 田志鹏 李冀 毕卫红[1] 卢玉梅[3] 

机构地区：[1]燕山大学信息科学与工程学院,河北秦皇岛066004 [2]中国工商银行秦皇岛分行信息科技部,河北秦皇岛066004 [3]中央广播电视大学,北京100031

出　　处：《燕山大学学报》2011年第2期134-141,共8页Journal of Yanshan University

基　　金：河北省自然科学基金项目(F2010001286);河北省应用基础研究计划重点基础研究项目(10963526D)

摘　　要：研究了基于结构性改变的光子晶体光纤光栅的热激法制备工艺,理论分析了此种工艺的成栅原理,采用热传导理论和有限元法研究了制备过程中光子晶体光纤中的温度场分布,以及包层空气孔结构和激光参数对成栅效果的影响。研究结果表明,利用光子晶体光纤包层空气孔周期性塌缩可以形成光栅;采用两点热激法时,能够实现能量在光纤径向均匀分布,轴向近似于高斯分布;包层气孔结构加速了成栅过程,相同光斑尺寸下,光纤塌缩所需激光功率随气孔层数和气孔半径的增大而减小;最后,对包层空气孔结构为1层到7层的光子晶体光纤热激过程进行仿真,得到了空气填充率与所需激光功率的关系。此种光纤光栅从根本上克服了传统光栅热稳定性和长期稳定性不佳的问题,在光纤传感等领域具有较大的潜在应用价值。The fabrication technology of heat method of photonic crystal fiber grading based on its structural change is researched, and the principle of photonic crystal fiber grating is analyzed.Heat transfer theory and finite element method are used to analyze the influence of structure of air hole in the envelope,parameters of laser bean in the grating process and distribution of thermal field on grating technology.The results show that grating can be formed by periodic collapsed pillars of PCF.Under double-side thermal stimulation,energy will be well-distributed in the radial direction and similar to Gaussian distribution in the axial direction.Also air-hole structure accelerated the grating process.In the same size of facula,as the number of layers and radius of pillars increase, laser power needed for grating decreases.Then the relationships between needed laser power and air filling rate are obtained by stimulating the grating process of PCF with different layers.This FCP grating has overcome the poor thermal stability and poor long-term stability of traditional grating fundamentally and has great potential applications in the related areas of fiber-optic sensor.

关 键 词：光纤光栅 光子晶体光纤 热激法 结构性改变 有限元法 

分 类 号：TN253[电子电信—物理电子学]