Fabrication of mid-infrared hollow-core Bragg fiber and it application in gas sensing

被引：1
|
作者：
Shi Li-Chao [1 ]
Zhang Wei [1 ]
Jin Jie [1 ]
Huang Yi-Dong [1 ]
Peng Jiang-De [1 ]
机构：
[1] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China
来源：
ACTA PHYSICA SINICA | 2012年 / 61卷 / 05期
基金：
中国国家自然科学基金;
关键词：
hollow-core Bragg fiber; mid-infrared transmission; one-dimensional photonic crystal; gas sensing; PHOTONIC BANDGAP FIBER; RING;
D O I：
10.7498/aps.61.054214
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In its application of gas sensing, the transmission band of the hollow-core Bragg fiber should match the main absorption peak of the target gas. In this paper, we introduce the design method of the hollow-core Bragg fiber transmission band and develop a fabrication process supporting its transmission band control. Fiber samples with fundamental transmission bands at 10.6 mu m and 3.3 mu m are fabricated, whose transmission losses are 5.9 dB/m and 8.8 dB/m, respectively, measured by the cut-back method. Utilizing the fiber sample with a transmission band of 3.3 mu m, the injection and the expulsion of CH4/N-2 gas are realized and observed by the change of fiber transmission spectrum. The detection limit of the experimental system is measured to be 26 ppm for CH4 by exponential dilution method, demonstrating the feasibility of hollow-core Bragg fiber in its application of gas sensing.
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页数：7
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