AN EFFECTIVE ATTENUATION COEFFICIENT FOR EVANESCENT WAVE SPECTROSCOPY USING MULTIMODE FIBER

被引：50

作者：

RUDDY, V

机构：

[1] School of Physical Sciences Dublin City University Glasnevin, Dublin

来源：

FIBER AND INTEGRATED OPTICS | 1990年 / 9卷 / 02期

关键词：

D O I：

10.1080/01468039008202901

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An attenuation coefficient for evanescent wave spectroscopy on the core of a multimode step index fiber in contact with an absorbing species is derived in terms of the range of incident angles of the meridional rays to the interface. An expression, for the fractional power outside the core as a function of incident angles is also given. Their ratio is discussed for the case of a fiber sensor having a porous cladding in contact with a gaseous absorbing species and one in which a section of cladding has been removed and replaced by an absorbing liquid. © Taylor & Francis Group, LLC.

引用

页码：143 / 151

页数：9

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