Sensitive liquid refractive index sensors using tapered optical fiber tips

被引：55
|
作者：
Tai, Yi-Hsin [1 ,3 ]
Wei, Pei-Kuen [1 ,2 ,3 ]
机构：
[1] Acad Sinica, Res Ctr Appl Sci, Taipei 115, Taiwan
[2] Natl Yang Ming Univ, Inst Biophoton Engn, Taipei 112, Taiwan
[3] Natl Taiwan Ocean Univ, Inst Optoelect Sci, Chilung 202, Taiwan
来源：
OPTICS LETTERS | 2010年 / 35卷 / 07期
关键词：
Refractometers - Optical fibers;
D O I：
10.1364/OL.35.000944
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
An optical fiber sensor based on the change of optical confinement in a subwavelength tip is presented. The optical spot is substantially increased when the environmental refractive index (RI) increases from 1.3 to 1.4. By measuring the intensity of low angular spectral components, an intensity sensitivity up to 8000% per RI unit is achieved. The fiber tip sensors take advantage of the small detection volume and real-time responses. We demonstrate the application of the nanofiber sensors for measuring concentrations of acids and evaporation rates of aqueous mixtures. (C) 2010 Optical Society of America
引用
收藏
页码：944 / 946
页数：3
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