Reflective liquid level sensor based on modes conversion in thin-core fiber incorporating titled fiber Bragg grating

被引：55

作者：

Gu, Bobo ^{[1
]}

Qi, Wenliang ^{[1
,2
]}

Zhou, Yanyan ^{[1
,3
]}

Wu, Zhifang ^{[1
,2
]}

Shum, Perry Ping ^{[1
,2
]}

Luan, Feng ^{[1
,2
]}

机构：

[1] Nanyang Technol Univ, Sch Elect & Elect Engn, OPTIMUS, Singapore 639798, Singapore

[2] CINTRA CNRS NTU THALES, UMI 3288, Singapore, Singapore

[3] Singapore Inst Mfg Technol, Precis Measurements Grp, Singapore, Singapore

来源：

OPTICS EXPRESS | 2014年 / 22卷 / 10期

关键词：

TILTED FIBER;

D O I：

10.1364/OE.22.011834

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A simple and compact reflective liquid level sensor based on modes conversion in the thin-core fiber incorporating one tilted fiber Bragg grating (TFBG) is proposed and experimentally demonstrated. A piece of thin-core fiber containing one TFBG ensures the modes conversion between the core mode and cladding modes. The external liquid can induce the cladding modes covert to the radiation modes and lead to the decrement of the collected cladding modes power, then the liquid level can be measured from the collected cladding modes power. The modes conversion in the proposed structure is theoretically analyzed. The experimental results show the high liquid level sensitivity and temperature immunity of the proposed sensor, and its significant advantage is that the measurement range is not limited to the length of the TFBG itself. (C) 2014 Optical Society of America

引用

页码：11834 / 11839

页数：6

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