Ultrahigh-sensitivity sensors based on thin-film coated long period gratings with reduced diameter, in transition mode and near the dispersion turning point

被引：96
|
作者：
Del Villar, Ignacio [1 ]
机构：
[1] Univ Publ Navarra, Dept Elect & Elect Engn, Pamplona 31006, Spain
来源：
OPTICS EXPRESS | 2015年 / 23卷 / 07期
关键词：
FIBER GRATINGS; REFRACTIVE-INDEX; DEPOSITION; OVERLAY;
D O I：
10.1364/OE.23.008389
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The mode transition and the dispersion turning point have been explored for optimization of thin- film coated long period fiber gratings during the last years. In this work and additional parameter, the cladding diameter, is combined with the other two phenomena for improving the sensitivity to the surrounding medium refractive index. The numerical data obtained were calculated with a method based on the exact calculation of core and cladding modes and the utilization of coupled mode theory. A sensitivity 143 x 10(3) nm/RIU is obtained, the highest reported so far with long period fiber gratings. (C) 2015 Optical Society of America
引用
收藏
页码：8389 / 8398
页数：10
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