An optical fiber sensor for the detections of liquid level and strain through cascading Sagnac interference and modal interference

被引：13

作者：

Chen, Qiang ^{[1
,2
]}

Chen, Hailiang ^{[1
,2
]}

Liu, Yundong ^{[1
,2
]}

Gao, Zhigang ^{[1
,2
]}

Wu, Biao ^{[1
,2
]}

Fan, Xiaoya ^{[1
,2
]}

Liu, Chaoyi ^{[1
,2
]}

Li, Hongwei ^{[1
,2
]}

Li, Yuxin ^{[1
,2
]}

Ma, Mingjian ^{[1
,2
]}

机构：

[1] Yanshan Univ, Sch Sci, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, PR, Peoples R China

[2] Yanshan Univ, Sch Sci, Key Lab Microstructural Mat Phys Hebei Prov, Qinhuangdao 066004, PR, Peoples R China

来源：

INFRARED PHYSICS & TECHNOLOGY | 2022年 / 127卷

基金：

中国国家自然科学基金;

关键词：

Sagnac interference; Multi mode interference; Liquid level detection; Strain detection;

D O I：

10.1016/j.infrared.2022.104387

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

An optical fiber sensor for the detections of strain and liquid level was experimentally investigated in this paper. This sensor was fabricated through cascading the Sagnac interference (SI) and multi-mode interference (MMI). A construction of single mode fiber-no core fiber-single mode fiber (SMF-NCF-SMF) was used to excite the MMI, while a section of 10.0 cm long Panda polarization maintaining fiber (PMF) was utilized to generate the polarization modes interference in the Sagnac loop. Two interference valleys corresponding to the MMI and SI appeared in the transmission spectrum and were utilized to detect the liquid level and strain, respectively. The measurement sensitivity of liquid level is higher than most of the reported sensors. This designed sensor could become a good candidate for the liquid level and strain detection owing to the simple structure, high sensitivity, and low hysteresis effect.

引用

页数：5

共 30 条

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