Study of the sensitivity of gas sensing by use of index-guiding photonic crystal fibers

被引：19

作者：

Li, Shu-Guang ^{[1
]}

Liu, Si-Ying

Song, Zhao-Yuan

Han, Yin

Cheng, Tong-Lei

Zhou, Gui-Yao

Hou, Lan-Tian

机构：

[1] Yanshan Univ, Coll Sci, Qinhuangdao 066004, Peoples R China

[2] Yanshan Univ, Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China

来源：

APPLIED OPTICS | 2007年 / 46卷 / 22期

关键词：

D O I：

10.1364/AO.46.005183

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate an absorption transmission spectrum of CH4 in a 16.9 cm long index-guiding photonic crystal fiber (PCF) fabricated in our laboratory. One of the main factors to improve the sensitivity is to increase the fraction of power in PCF cladding air holes. We study the fraction of power in PCF cladding air holes as a function of the index-guiding PCF parameters. We found that a PCF with small spacing and a large air-filling ratio has a higher fraction of power in its cladding air holes. At the same time the mode area in this PCF is small and would generate strong nonlinear effects in the fiber. If we use a PCF in which the core is formed by missing seven air holes, it is immediately obvious that the PCF used as a sensor has higher sensitivity and a larger mode area. (c) 2007 Optical Society of America.

引用

页码：5183 / 5188

页数：6

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