Numerical study of refractive index sensing based on the anti-guide property of a depressed-index core photonic crystal fiber

被引：6

作者：

Hoo, Y. L. ^{[1
]}

Jin, W. ^{[1
]}

Xiao, L. ^{[1
]}

Ju, J. ^{[1
]}

Ho, H. L. ^{[1
]}

机构：

[1] Hong Kong Polytech Univ, Dept Elect Engn EE, Kowloon, Hong Kong, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2009年 / 136卷 / 01期

关键词：

Refractive index; Sensor; Photonic crystal fiber; Photonic bandgap; Depressed-index; Cutoff; OPTICAL-FIBER; GRATINGS;

D O I：

10.1016/j.snb.2008.10.047

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Refractive index (RI) sensing based on the anti-guiding property of a depressed-index core photonic crystal fiber (PCF) is studied. A new type of RI sensor is formed by adding a hole to the core of a conventional index guiding PCF for the purpose of measurand filling and the depressed-index core formation. The dependencies of measurement resolution and dynamic range on the structural parameters of the RI sensor are investigated. RI sensors filled with the measurand covering a refractive index range from 1.328 to 1.445 are numerically simulated. Simulation results show that the measurement resolution from 9.32 x 10(-7) to 1.23 x 10(-7) can be achieved by means of wavelength measurement with an optical spectrum analyzer with 0.01 nm resolution. Also, problem caused by the existence of the photonic bandgap (PBG) mode which may influence the feasibility of the RI sensing mechanism is considered. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：26 / 31

页数：6

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