Ridge-waveguide-based polarization insensitive Bragg grating refractometer

被引：22

作者：

Dai, X. ^{[1
]}

Mihailov, S. J. ^{[1
]}

Callender, C. L. ^{[1
]}

Blanchetiere, C. ^{[1
]}

Walker, R. B. ^{[1
]}

机构：

[1] Commun Res Ctr, Ottawa, ON K2H 8S2, Canada

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 2006年 / 17卷 / 07期

关键词：

high sensitivity; evanescent field; Bragg grating; open top ridge waveguide; polarization insensitive; mode conversion; refractometer;

D O I：

10.1088/0957-0233/17/7/013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A highly sensitive waveguide Bragg grating (WBG) sensor for measuring small changes of the refractive index of the surrounding liquid is presented. By using an open top ridge waveguide with a small core, the evanescent field interaction of the guided mode with the liquid analyte on the top of the waveguide is enhanced. The sensitivity measured via a shift in the resonance wavelength of the Bragg grating as high as 1 pm of wavelength shift for a change of 4 x 10(-5) in the refractive index around 1.402 is realized. With a polarization insensitive Bragg grating, the polarization dependence of the sensor is improved. A theoretical analysis for the sensitivity of ridge waveguide sensors is given. The experimental results are in good agreement with the theoretical analysis.

引用

页码：1752 / 1756

页数：5

共 12 条

[1] DUAL EFFECTIVE-INDEX METHOD FOR THE ANALYSIS OF RECTANGULAR DIELECTRIC WAVE-GUIDES [J].