Analysis of the sensitivity of optical waveguide chemical sensors for TM modes by the group-index method

被引：23

作者：

Qing, DK ^{[1
]}

Yamaguchi, I ^{[1
]}

机构：

[1] RIKEN, Inst Phys & Chem Res, Opt Engn Lab, Wako, Saitama 3510198, Japan

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 1999年 / 16卷 / 09期

关键词：

D O I：

10.1364/JOSAB.16.001359

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The sensitivity of optical waveguide chemical sensors for TM modes is investigated by use of the group-index method [J. Lightwave Technol. 14, 1907 (1996)]. We compare the absorption coefficients of TM modes with those of TE modes to determine in which mode the sensor should work. For open-clad-type evanescent-wave sensors, which mode is more favorable depends on whether the refractive index of the measurand is smaller or larger than that of the substrate; for buffered-clad-type evanescent-wave sensors, the choice depends on the function of the buffer layer; for sensing-layer-type evanescent-wave sensors, the TE mode has greater sensitivity than the TM mode; and for guided-wave sensors, both TE and TM modes are suitable for use in highly sensitive sensors. (C) 1999 Optical Society of America [50740-3224(99)00609-8].

引用

页码：1359 / 1369

页数：11

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