Ultrasensitive fiber-optic temperature sensor based on cascaded Sagnac interferometers with a nematic liquid crystal film

Fan，Xiaoya1; Chen，Hailiang1; Zheng，Yu2; Liu，Yundong1; Chen，Qiang1; Zhang，Yingyue1; Ma，Mingjian1; Du，Huijing1; Li，Shuguang1; Shum，Perry Ping3

2022-08-01

10.1016/j.optlastec.2022.108169

OPTICS AND LASER TECHNOLOGY   影响因子和分区

0030-3992

1879-2545

We demonstrated an ultrasensitive fiber-optic temperature sensor based on cascaded Sagnac interferometers (CSIs). One of the Sagnac interferometers (SIs) consisted of a panda polarization-maintaining fiber (PMF) as the reference arm, while the other one contained two single-mode patch cables in a ferrule matching sleeve as the sensing arm, where a nematic liquid crystal (NLC) film was infiltrated into the micron-scale gap of the sleeve. In the sensing SI, the orientation of NLC film was induced by just rotating the two single-mode patch cables without any orientation agent, electric, or magnetic devices. Vernier effect was acquired by adjusting the thickness of NLC film. Experimental results revealed that the temperature sensitivity of the CSIs was up to 43.13 nm/°C, which was enhanced about 5 times compared to the single NLC SI. The designed optical fiber temperature sensor possessed the merits of compact structure, high stability, ultrahigh sensitivity, low hysteresis effect and high resolution, showing a promising application prospect in some scientific filed requiring accurate temperature measurement, such as biomolecules, medicine and other filed.

Cascaded Sagnac interferometers Nematic liquid crystal Temperature sensor Vernier-effect

SCI ; EI

英语

其他

Natural Science Foundation of Hebei Province[F2021203112] ; National Natural Science Founda-tion of China[12074331] ; National Key Research and Development Project[2019YFB2204001]

Optics ; Physics

Optics ; Physics, Applied

WOS:000794981500002

ELSEVIER SCI LTD

20221611976902

Cables ; Fiber optic sensors ; Fiber optics ; Interferometers ; Liquid films ; Nematic liquid crystals ; Polarization-maintaining fiber ; Temperature measurement

Fiber Optics:741.1.2 ; Optical Instruments:941.3 ; Temperature Measuring Instruments:944.5 ; Temperature Measurements:944.6

ENGINEERING

2-s2.0-85128226089

Scopus

1.State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province,School of Science,Yanshan University,Qinhuangdao,066004,China
2.School of Electrical and Electronic Engineering,Nanyang Technological University,50 Nanyang Avenue 639798,Singapore
3.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Fan，Xiaoya,Chen，Hailiang,Zheng，Yu,et al. Ultrasensitive fiber-optic temperature sensor based on cascaded Sagnac interferometers with a nematic liquid crystal film[J]. OPTICS AND LASER TECHNOLOGY,2022,152.

Fan，Xiaoya.,Chen，Hailiang.,Zheng，Yu.,Liu，Yundong.,Chen，Qiang.,...&Shum，Perry Ping.(2022).Ultrasensitive fiber-optic temperature sensor based on cascaded Sagnac interferometers with a nematic liquid crystal film.OPTICS AND LASER TECHNOLOGY,152.

Fan，Xiaoya,et al."Ultrasensitive fiber-optic temperature sensor based on cascaded Sagnac interferometers with a nematic liquid crystal film".OPTICS AND LASER TECHNOLOGY 152(2022).