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高斯变迹FBG在非均匀介质下的数值响应特性研究

Study on Numerical Responsive Characteristics of Gaussian Apodized Fiber Bragg Grating under Uneven Medium

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摘要

基于光波导理论和传输矩阵法, 研究光纤包层被完全腐蚀后的高斯变迹光纤布拉格光栅(FBG)在非均匀外部介质环境下的反射谱特性。仿真过程中, 分别考虑高折射率区(1.43~1.45)和低折射率区(1.33~1.36)两种情况, 同时假设该非均匀外部介质折射率(SRI)呈不同的线性函数分布。仿真结果表明, 高斯变迹FBG的谱带宽、谱强度特性与SRI沿光栅轴向的线性分布梯度密切相关。随着SRI梯度增加, 反射谱的3dB带宽也逐渐增加, 此时高、低折射率区的梯度灵敏度分别为3.775×103nm·mm/riu和3.72×103nm·mm/riu。研究结果对高斯变迹FBG用于生化传感领域的非均匀介质测量具有一定意义。

Abstract

Based on the fiber waveguide theory and the transfer matrix method, researched is the reflection spectrum of Gaussian apodized FBG with the cladding completely corroded under uneven medium. During the stimulation process, high refractive-index(1.43~1.45) area and low refravtive area(1.33~1.36) are considered respectively. Meanwhile, it is supposed the uneven SRI shows different linear function distributions. Simulations show the spectrum bandwidth and spectrum intensity of Gussian apodized FBG depend on the SRI along the grating axial linear distribution gradient. As SRI gradient increases, the gradient sensitivity of high refractive index area and low refractive index area is 3.775×103nm·mm/riu and 3.72×103nm·mm/riu, respectively.

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中图分类号:TP212.14

所属栏目:光电器件

基金项目:国家自然科学基金项目(50876120, 51276209).

收稿日期:2012-10-29

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作者单位    点击查看

赵明富:重庆理工大学 电子信息与自动化学院, 重庆 400054
汪颖:重庆理工大学 电子信息与自动化学院, 重庆 400054
罗彬彬:重庆理工大学 电子信息与自动化学院, 重庆 400054
曹李华:重庆理工大学 电子信息与自动化学院, 重庆 400054

联系人作者:赵明富(zmf@cqut.edu.cn)

备注:赵明富(1964-), 男, 重庆市人, 工学博士, 教授, 研究方向为生化信息获取技术与智能传感系统, 在国内外学术刊物发表论文40余篇。

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引用该论文

ZHAO Mingfu,WANG Ying,LUO Binbin,CAO Lihua. Study on Numerical Responsive Characteristics of Gaussian Apodized Fiber Bragg Grating under Uneven Medium[J]. Semiconductor Optoelectronics, 2013, 34(1): 25-29

赵明富,汪颖,罗彬彬,曹李华. 高斯变迹FBG在非均匀介质下的数值响应特性研究[J]. 半导体光电, 2013, 34(1): 25-29

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