| 光纤光栅Sagnac环级联特性 |
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| 引用本文： | 王巍,杨铿,安友伟,张爱华,杨丽君,黄展,冯世娟.光纤光栅Sagnac环级联特性[J].红外与激光工程,2013,42(2):465-469. |
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| 作者姓名： | 王巍 杨铿 安友伟 张爱华 杨丽君 黄展 冯世娟 |
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| 作者单位： | 1.重庆邮电大学 光电工程学院,重庆 400065 |
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| 基金项目： | 国家自然科学基金(61102075,51075420);重庆市电子产业发展基金 |
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| 摘 要： | 为了解决单个均匀光纤光栅Sagnac环信道隔离度差的缺点，提出了级联Sagnac环组成梳状滤波器的方案。采用Jones矩阵理论分别对单个光纤光栅Sagnac环和二阶、三阶级联时的频谱特性进行了理论分析和数值仿真。对于三阶Sagnac环级联时的情形，实现了通道间隔为0.8 nm、FWHM为0.1 nm的梳状滤波器，在相同信道间隔下使得FWHM降低为单个光纤光栅Sagnac环的1/4，从而有效提高了系统信道隔离度。得到了具有均匀通带间隔、信道隔离度高、光谱半高宽度FWHM窄等特性的梳状滤波器，使其性能能够更好地满足WDM的使用要求。
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| 关 键 词： | 光纤布拉格光栅 Sagnac环 梳状滤波器 光谱半高宽度 波分复用 |
| 收稿时间： | 2012-06-22 |
Characteristics of fiber grating′s Sagnac loop cascade |
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| Wang Wei,Yang Keng,An Youwei,Zhang Aihua,Yang Lijun,Huang Zhan,Feng Shijuan.Characteristics of fiber grating′s Sagnac loop cascade[J].Infrared and Laser Engineering,2013,42(2):465-469. |
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| Authors: | Wang Wei Yang Keng An Youwei Zhang Aihua Yang Lijun Huang Zhan Feng Shijuan |
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| Affiliation: | 1.College of Electronics Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China |
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| Abstract: | In order to overcome the deficiency of single uniform fiber grating Sagnac loop, which has poor channel isolation, the comb filter with a cascade of Sagnac loop was proposed. Also, the frequency spectrum characteristic of the single uniform fiber grating Sagnac loop, two and three order Sagnac loop were analyzed with Jones matrix theory. For the case of three order Sagnac loop, a comb filter which has 0.8 mm spacing and 0.1 nm FWHM was got. Furtermore, in the same channel spacing, this comb filter's FWHM was only 1/4 that of the single uniform fiber grating Sagnac loop's. The results show that the system channel isolation degree is improved effectively, and a comb filter which has uniform passband interval, high channel isolation, narrow FWHM characteristics was proposed, this kinds of filter can meet the WDM requirement better. |
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