Temperature-independent gas refractometer based on an S-taper fiber tailored fiber Bragg grating

被引：14
|
作者：
Shao, Zhihua [1 ]
Qiao, Xueguang [1 ]
Bao, Weijia [1 ]
Rong, Qiangzhou [1 ]
机构：
[1] NW Univ Xian, Dept Phys, Xian 710069, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2016年 / 374卷
基金：
中国国家自然科学基金;
关键词：
S-taper fiber; Fiber Bragg grating; Gas refractometer; REFRACTIVE-INDEX; OPTICAL-FIBER;
D O I：
10.1016/j.optcom.2016.04.051
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A fiber Bragg grating (FBG)-based gas refractometer is proposed and demonstrated experimentally. The configuration consists of a short section of S-type taper incorporated in the upstream of a FBG. The S-taper is capable to couple the core mode to cladding modes into the downstream single mode fiber (SMF), and the low-order cladding modes can be reflected back to the fiber core via the FBG. Because of the recoupling efficiency depending on surrounding refractive index (SRI), the reflection power of the device presents high response to gas RI change with the sensitivity of 172.7 dB/RIU. This power-referenced RI measurement and wavelength-referenced temperature measurement have been achieved via selective cladding modes monitoring. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：34 / 38
页数：5
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