Helical long-period grating formed in a thinned fiber and its application to a refractometric sensor

被引：61
|
作者：
Wang, Peng [1 ]
Li, Hongpu [2 ]
机构：
[1] Shizuoka Univ, Grad Sch Sci & Technol, 3-5-1 Johoku, Hamamatsu, Shizuoka 4328561, Japan
[2] Shizuoka Univ, Fac Engn, 3-5-1 Johoku, Hamamatsu, Shizuoka 4328561, Japan
来源：
APPLIED OPTICS | 2016年 / 55卷 / 06期
基金：
日本学术振兴会;
关键词：
REFRACTIVE-INDEX; TEMPERATURE; FABRICATION; CONVERSION; SINGLE;
D O I：
10.1364/AO.55.001430
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A new kind of helical long-period grating (HLPG) written by using a CO2 laser is proposed and experimentally demonstrated, in which a sapphire tube (to be used as a miniature oven with a constant temperature inside) is specially utilized in place of the commonly used ZnSe focused-lens. The proposed method allows fabrication of a HLPG in a thinned fiber with a diameter smaller than several tens of micrometers. As an application of this kind of HLPG, a unique fiber sensor that allows for temperature-insensitive measurement of the refractive index is proposed and experimentally demonstrated, which is based on utilization of two cascaded HLPGs but with different transverse diameters. (C) 2016 Optical Society of America
引用
收藏
页码：1430 / 1434
页数：5
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