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

Zhengyong Li; Changrui Liao; Jun Song; Ying Wang; Feng Zhu; Yiping Wang; Xiaopeng Dong

doi:doi:10.1364/prj.4.000197

Photonics Research, 2016, 4 (5): 05000197, Published Online: Nov. 23, 2016

Ultrasensitive magnetic field sensor based on an in-fiber Mach–Zehnder interferometer with a magnetic fluid component Download： 1188次

Zhengyong Li ¹Changrui Liao ^1,2Jun Song ¹Ying Wang ¹Feng Zhu ¹Yiping Wang ^1,*Xiaopeng Dong ³

Author Affiliations

¹ Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

² e-mail: cliao@szu.edu.cn

³ School of Information Science and Engineering, Xiamen University, Xiamen 361005, China

Figures & Tables

Fig. 1. Schematic diagram of the proposed magnetic field sensor.

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Fig. 2. (a) Optical microscope image of the cross-sectional morphology of SMF and TCF, including the dimensions of the elliptical TCF cores and the splicing point between SMF1 and TCF. (b) Schematic diagram of the femtosecond laser micromachining system. The insert image shows an optical microscope image of the drilled microchannel through Core2.

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Fig. 3. Transmission spectra of the pristine TCF and TCF with a microchannel filled with either air or an MF.

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Fig. 4. Schematic diagram of magnetic field response measurement.

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Fig. 5. Variation of the fringe dip wavelength with respect to an applied magnetic field, divided into sluggish area, high-sensitive area, low-sensitive area, and saturated area.

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Fig. 6. (a) Transmission spectral evolution with an increasing applied magnetic field in the linear response region from 5 to 9.5 mT. (b) Variation of the fringe dip wavelength and dip intensity with respect to an applied magnetic field.

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Table1. Comparisons of the Proposed TCF-Based MZI with Other Magnetic Field Sensors

Structure	Range (mT)	Wavelength Sensitivity (nm/mT)
Single-mode–multimode–single-mode [10]	0–22	0.905
Asymmetric optical fiber taper [16]	0–21.4	−0.16206
Taper-like and lateral-offset fusion splicing [9]	3.8–47.5	0.141
Michelson interferometer [13]	0–107	0.0649
Fabry–Perot interferometer [6]	0–40	0.431
Proposed MZI	5–9.5	20.8

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Zhengyong Li, Changrui Liao, Jun Song, Ying Wang, Feng Zhu, Yiping Wang, Xiaopeng Dong. Ultrasensitive magnetic field sensor based on an in-fiber Mach–Zehnder interferometer with a magnetic fluid component[J]. Photonics Research, 2016, 4(5): 05000197.

Ultrasensitive magnetic field sensor based on an in-fiber Mach–Zehnder interferometer with a magnetic fluid component Download： 1188次

Fig. 1. Schematic diagram of the proposed magnetic field sensor.

Fig. 3. Transmission spectra of the pristine TCF and TCF with a microchannel filled with either air or an MF.

Fig. 4. Schematic diagram of magnetic field response measurement.

Fig. 5. Variation of the fringe dip wavelength with respect to an applied magnetic field, divided into sluggish area, high-sensitive area, low-sensitive area, and saturated area.

Fig. 6. (a) Transmission spectral evolution with an increasing applied magnetic field in the linear response region from 5 to 9.5 mT. (b) Variation of the fringe dip wavelength and dip intensity with respect to an applied magnetic field.

Table1. Comparisons of the Proposed TCF-Based MZI with Other Magnetic Field Sensors

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Ultrasensitive magnetic field sensor based on an in-fiber Mach–Zehnder interferometer with a magnetic fluid component Download： 1188次

Fig. 1. Schematic diagram of the proposed magnetic field sensor.

Fig. 3. Transmission spectra of the pristine TCF and TCF with a microchannel filled with either air or an MF.

Fig. 4. Schematic diagram of magnetic field response measurement.

Fig. 5. Variation of the fringe dip wavelength with respect to an applied magnetic field, divided into sluggish area, high-sensitive area, low-sensitive area, and saturated area.

Fig. 6. (a) Transmission spectral evolution with an increasing applied magnetic field in the linear response region from 5 to 9.5 mT. (b) Variation of the fringe dip wavelength and dip intensity with respect to an applied magnetic field.

Table1. Comparisons of the Proposed TCF-Based MZI with Other Magnetic Field Sensors

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