摘要
根据耦合模理论得出光纤Bragg光栅的反射率表达式、Bragg光栅的反射特性、设计反射中心波长λD=2nef fΛ。通过对Bragg光栅反射率表达式进行数值模拟,绘制在不同参数下反射率特性曲线和带宽特性曲线,并分析了反射率Rg,带宽Δλ与光栅栅距Λ,栅长L和折射率微扰值δnef f之间的关系,得到了它们之间的最佳配合,对制作优良特性的光栅具有指导意义。
The reflectivity expression of fiber Bragg grating was obtained from the coupled mode theory,and the reflective properties of the fiber Bragg grating were educed from this expression.The designed reflected central wavelength was λD=2neffΛ.By simulating the reflectivity expression of fiber Bragg grating,the reflectance curves and the bandwidth curves were plotted in different parameters.Furthermore the relationship among the characteristic parameters： the reflectivity Rg,the bandwidth Δλ,and the production parameters： the grating spacing Λ, the grating length L and the value ot refractive index micro-disturber δnef f were analyzed. The conclusions were meaningful at making appropriate fiber Bragg grating.
出处
《桂林电子科技大学学报》
2009年第6期459-462,共4页
Journal of Guilin University of Electronic Technology
基金
广西自然科学基金(桂科自0832007)
关键词
光纤BRAGG光栅
光谱特性
反射峰值
反射带宽
fiber Bragg grating（FBG）
spectrum properties
peak reflectivity
reflected bandwidth
