Evanescent wave absorption based fiber optic pH sensor prepared by dye doped sol-gel immobilization technique

被引：60

作者：

Gupta, BD

Sharma, DK

机构：

[1] Department of Physics, Indian Institute of Technology

来源：

OPTICS COMMUNICATIONS | 1997年 / 140卷 / 1-3期

关键词：

fiber optics; sensor; evanescent wave; absorption; pH; sol-gel process;

D O I：

10.1016/S0030-4018(97)00162-4

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A fiber optic pH sensor based on evanescent wave absorption is presented. To prepare the probe a small length of the cladding is removed from the middle portion of the fiber. A thin porous film of glass with pH-sensitive dye entrapped in it is deposited on the surface of the unclad portion of the fiber using sol-gel technology. The sensor response and its dynamic range are reported for phenol red, cresol red and bromophenol blue dyes. The sol-gel process has been found to increase the dynamic range of the pH sensor. (C) 1997 Elsevier Science B.V.

引用

页码：32 / 35

页数：4

共 23 条

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