Spectral behavior in thinned long period gratings: Effects of fiber diameter on refractive index sensitivity

被引：46
|
作者：
Ladicicco, Agostino
Campopiano, Stefania
Giordano, Michele
Cusano, Andrea
机构：
[1] Univ Sannio, Div Optoelect, Dept Engn, I-82100 Benevento, Italy
[2] CNR, Inst Composite Biomed Mat, I-80055 Naples, Italy
[3] Univ Naples Parthenope, Dept Technol, I-80133 Naples, Italy
来源：
APPLIED OPTICS | 2007年 / 46卷 / 28期
关键词：
D O I：
10.1364/AO.46.006945
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report the experimental investigation of the sensitivity characteristics to the surrounding refractive index (SRI) in thinned long period gratings (LPGs) for a wide range of fiber diameters and different low-orders cladding modes. Wet chemical etching combined with microscopic and spectral analysis allow us to experimentally retrieve the SRI sensitivity characteristics of thinned LPGs. The obtained results allow us to identify accurately the dependence of the sensitivity characteristics on the fiber radius, taking into account the SRI range and the order mode. This provides a useful tool to identify the thinned structure able to fulfill the sensitivity requirements by maintaining an acceptable robustness level. (c) 2007 Optical Society of America.
引用
收藏
页码：6945 / 6952
页数：8
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