A fiber optic pH sensor with dye doped multi-layer sol-gel coatings

被引：0

作者：

Lee, ST ^{[1
]}

Jose, G ^{[1
]}

Manju, CM ^{[1
]}

Joseph, B ^{[1
]}

John, MS ^{[1
]}

Radhakrishnan, P ^{[1
]}

Nampoori, VPN ^{[1
]}

Vallabhan, CPG ^{[1
]}

Unnikrishnan, NV ^{[1
]}

机构：

[1] Cochin Univ Sci & Technol, Int Sch Photon, Cochin 682022, Kerala, India

来源：

PHOTONICS 2000: INTERNATIONAL CONFERENCE ON FIBER OPTICS AND PHOTONICS | 2001年 / 4417卷

关键词：

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

D O I：

10.1117/12.441350

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The design and fabrication of a fiber optic pH sensor working on the basis of evanescent wave absorption is presented. A pH sensitive dye is immobilized on the uncladed portion of the optic fiber by sol-gel route. The sensitivity of the device is found to increase when multiple sol-gel coatings are used as the cladding in the sensing region. The sensor response and its dynamic range are reported for two pH indicator dyes, viz. bromocresol purple and bromocresol green.

引用

页码：546 / 554

页数：9

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