scholarly journals All Fiber Mach–Zehnder Interferometer Based on Intracavity Micro-Waveguide for a Magnetic Field Sensor

2021 ◽  
Vol 11 (23) ◽  
pp. 11569
Author(s):  
Maoqing Chen ◽  
Qifeng Liu ◽  
Yong Zhao
Keyword(s):  
Magnetic Field ◽  
Optical Fiber ◽  
Magnetic Fluid ◽  
Light Transmission ◽  
Magnetic Field Sensor ◽  
Magnetic Field Measurement ◽  
Term Operation ◽  
The Core ◽  
Field Sensor ◽  
Air Hole

A magnetic fluid (MF)-based magnetic field sensor with a filling-splicing fiber structure is proposed. The sensor realizes Mach–Zehnder interference by an optical fiber cascade structure consisting of single mode fiber (SMF), multimode fiber (MMF), and single-hole-dual-core fiber (SHDCF). The core in the cladding and the core in the air hole of SHDCF are used as the reference and sensing light path, respectively, and the air hole of SHDCF is filled with magnetic fluid to realize magnetic field measurement based on magnetic controlled refractive index (RI) characteristics. The theoretical feasibility of the proposed sensing structure is verified by Rsoft simulation, the optimized length of SHDCF is determined by optical fiber light transmission experiment, and the SHDCFs are well fused without collapse through the special parameter setting. The results show that the sensitivity of the sensor is −116.1 pm/Gs under a magnetic field of 0~200 Gs with a good long-term operation stability. The proposed sensor has the advantages of high stability, fast response, simple structure, and low cost, which has development potential in the field of miniaturized magnetic field sensing.

Optical fiber magnetic field sensor based on single-mode–multimode–single-mode structure and magnetic fluid

2013 ◽  
Vol 38 (20) ◽  
pp. 3999 ◽  
Author(s):  
Yaofei Chen ◽  
Qun Han ◽  
Tiegen Liu ◽  
Xinwei Lan ◽  
Hai Xiao
Keyword(s):  
Magnetic Field ◽  
Optical Fiber ◽  
Magnetic Fluid ◽  
Single Mode ◽  
Magnetic Field Sensor ◽  
Mode Structure ◽  
Field Sensor

scholarly journals Optical fiber magnetic field sensor based on magnetic fluid and microfiber mode interferometer

2015 ◽  
Vol 336 ◽  
pp. 5-8 ◽  
Author(s):  
Yangzi Zheng ◽  
Xinyong Dong ◽  
Chi Chiu Chan ◽  
Perry Ping Shum ◽  
Haibin Su
Keyword(s):  
Magnetic Field ◽  
Optical Fiber ◽  
Magnetic Fluid ◽  
Magnetic Field Sensor ◽  
Field Sensor

Micro-structured optical fiber magnetic field sensor based on magnetic fluid filling

2019 ◽  
Vol 33 (31) ◽  
pp. 1950380
Author(s):  
Jie Wang ◽  
Zhen Zhang ◽  
Shuguang Li ◽  
Shun Wang
Keyword(s):  
Magnetic Field ◽  
Magnetic Fluid ◽  
High Sensitivity ◽  
Magnetic Field Sensor ◽  
The Finite Element Method ◽  
Average Sensitivity ◽  
Magnetic Field Sensors ◽  
Hole Radius ◽  
Field Sensor ◽  
Air Hole

A novel micro-structured fiber magnetic field sensor based on magnetic fluid (MF) filling is proposed. The air hole radius in the cladding of fiber is reduced from inner layer to outer layer, and the numerical analysis is performed by the finite element method (FEM). For the [Formula: see text]-pol mode, the proposed sensor has an average sensitivity of 960.61 pm/Oe, and for the [Formula: see text]-pol mode, the average sensitivity can reach 884.85 pm/Oe. The sensor has the advantages of small size and high sensitivity and is competitive in magnetic field sensors.

scholarly journals Intensity-modulated magnetic field sensor based on magnetic fluid and optical fiber gratings

2013 ◽  
Vol 103 (18) ◽  
pp. 183511 ◽  
Author(s):  
Jie Zheng ◽  
Xinyong Dong ◽  
Peng Zu ◽  
Junhua Ji ◽  
Haibin Su ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Optical Fiber ◽  
Magnetic Fluid ◽  
Magnetic Field Sensor ◽  
Fiber Gratings ◽  
Intensity Modulated ◽  
Field Sensor ◽  
Optical Fiber Gratings

scholarly journals A Highly Sensitive Intensity-Modulated Optical Fiber Magnetic Field Sensor Based on the Magnetic Fluid and Multimode Interference

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Yi Huang ◽  
Tingyun Wang ◽  
Chuanlu Deng ◽  
Xiaobei Zhang ◽  
Fufei Pang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Optical Fiber ◽  
Magnetic Fluid ◽  
High Sensitivity ◽  
Single Mode ◽  
Magnetic Field Sensor ◽  
Modulation Method ◽  
High Modulation ◽  
Compact Size ◽  
Field Sensor

Fiber-optic magnetic field sensing is an important method of magnetic field monitoring, which is essential for the safety of civil infrastructures, especially for power plant. We theoretically and experimentally demonstrated an optical fiber magnetic field sensor based on a single-mode-multimode-single-mode (SMS) structure immersed into the magnetic fluid (MF). The length of multimode section fiber is determined based on the self-image effect through the simulation. Due to variation characteristics of the refractive index and absorption coefficient of MF under different magnetic fields, an effective method to improve the sensitivity of SMS fiber structure is realized based on the intensity modulation method. This sensor shows a high sensitivity up to 0.097 dB/Oe and a high modulation depth up to 78% in a relatively linear range, for the no-core fiber (NCF) with the diameter of 125 μm and length of 59.8 mm as the multimode section. This optical fiber sensor possesses advantages of low cost, ease of fabrication, high sensitivity, simple structure, and compact size, with great potential applications in measuring the magnetic field.

Characteristics of All-Optical-Fiber Magnetic Field Sensor Based on Magnetic Fluid Coating and Cooling Tapering

2020 ◽  
Vol 57 (1) ◽  
pp. 010602
Author(s):  
汪成程 Wang Chengcheng ◽  
范荣华 Fan Ronghua ◽  
吴根柱 Wu Genzhu ◽  
彭保进 Peng Baojin ◽  
张峰 Zhang Feng
Keyword(s):  
Magnetic Field ◽  
Optical Fiber ◽  
Magnetic Fluid ◽  
Magnetic Field Sensor ◽  
All Optical ◽  
Field Sensor
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