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Ultrasensitive magnetic field sensor based on an in-fiber Mach–Zehnder interferometer with a magnetic fluid component

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Abstract

An ultrasensitive magnetic field sensor based on a compact in-fiber Mach–Zehnder interferometer (MZI) created in twin-core fiber (TCF) is proposed, and its performance is experimentally demonstrated. A section of TCF was spliced between two sections of standard single-mode fibers, and then a microchannel was drilled throughone core of the TCF by means of femtosecond laser micromachining. The TCF with one microchannel was then immersed in a water-based Fe3O4 magnetic fluid (MF), forming a direct component of the light propagation path, and then sealed in a capillary tube, achieving a magnetic sensing element, which merges the advantages of an MZI with an MF. Experiments were conducted to investigate the magnetic response of the proposed sensor. The developed magnetic field sensor exhibits a linear response within a measurement range from 5 to 9.5 mT and an ultrahigh sensitivity of 20.8 nm/mT, which, to our best knowledge, is 2 orders of magnitude greater than other previously reported magnetic sensors. The proposed sensor is expected to offer significant potential for detecting weak magnetic fields.

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DOI:10.1364/prj.4.000197

基金项目:National Natural Science Foundation of China (NSFC) (61425007, 61377090, 61575128); Guangdong Science and Technology Department (2014A030308007, 2014B050504010, 2015B010105007, 2015A030313541); Science and Technology Innovation Commission of Shenzhen (ZDSYS20140430164957664, GJHZ20150313093755757, KQCX20140512172532195, JCYJ20150324141711576); Pearl River Scholar Fellowships.

收稿日期:2016-06-28

录用日期:2016-08-24

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作者单位    点击查看

Zhengyong Li:Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Changrui Liao:Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, Chinae-mail: cliao@szu.edu.cn
Jun Song:Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Ying Wang:Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Feng Zhu:Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Yiping Wang:Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Xiaopeng Dong:School of Information Science and Engineering, Xiamen University, Xiamen 361005, China

联系人作者:Yiping Wang(ypwang@szu.edu.cn)

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引用该论文

Zhengyong Li, Changrui Liao, Jun Song, Ying Wang, Feng Zhu, Yiping Wang, and Xiaopeng Dong, "Ultrasensitive magnetic field sensor based on an in-fiber Mach–Zehnder interferometer with a magnetic fluid component," Photonics Research 4(5), 0197 (2016)

被引情况

【1】汪成程,范荣华,吴根柱,彭保进,张峰. 基于磁流包覆冷却拉锥全光纤磁场传感器特性研究. 激光与光电子学进展, 2020, 57(1): 10602--1

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