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A magnetic field sensor based on a novel phase-shifted fiber Bragg grating with magnetic fluid is proposed and experimentally demonstrated. It is fabricated by cleaving a uniform fiber Bragg grating at the center point, introducing a micrometre gap as a phase-shift and then filling the gap with magnetic fluid. External applied magnetic field changes refractive index of the magnetic fluid, leading...
A magnetic field sensor based on a novel phase-shifted fiber Bragg grating with magnetic fluid is proposed and experimentally demonstrated. It is fabricated by cleaving a uniform fiber Bragg grating at the center point, introducing a micrometre gap as a phase-shift and then filling the gap with magnetic fluid. External applied magnetic field changes refractive index of the magnetic fluid, leading...
A magnetic field sensor based on twisted single mode fiber and magnetic fluid (MF) is proposed and demonstrated. The sensor consists of two twisted points on a single mode fiber introduced by flame-heated and rotation treatment. Cladding modes are excited at the first twisted point and part of them are coupled back to the fiber core at the second twisted point, forming an inline Mach-Zehnder interferometer...
A magnetic field optical fiber sensor based on Sagnac interference is proposed by inserting a silica tube filled with magnetic fluid into the Sagnac loop. The birefringence of the sensor is present in the loop, and the transmission spectrum as a function of the magnetic field intensity has been theoretically analyzed and experimentally demonstrated. The results show that the spectral response is proportional...
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