Title :
Loss-Based Magnetic Field Sensor Employing Hollow Core Fiber and Magnetic Fluid
Author :
Binbin Song ; Yinping Miao ; Wei Lin ; Hao Zhang ; Bo Liu ; Jixuan Wu ; Haifeng Liu ; Donglin Yan
Author_Institution :
Key Lab. of Opt. Inf. Sci. & Technol., Nankai Univ., Tianjin, China
Abstract :
An inline optical fiber magnetic field sensor based on hollow core fiber (HCF) wall integrated with magnetic fluid tuned by magnetic field was proposed by sandwiching a length of HCF between two single mode fibers with offset joints. Intermodal interference is present in the HCF wall, mode propagation, as well as mode field distribution within the HCF wall have been simulated, and the contrast ratio of the interference fringes in response to the variation of the applied magnetic field has been theoretically analyzed and experimentally observed. The maximum sensing sensitivity of -0.02173 dB/Oe within the linear magnetic intensity range from 150 to 300 Oe has been achieved.
Keywords :
fibre optic sensors; light interference; magnetic fluids; magnetic leakage; magneto-optical sensors; hollow core fiber; inline optical fiber magnetic field sensor; intermodal interference; linear magnetic intensity; loss-based magnetic field sensor; magnetic fluid; mode field distribution; sensing sensitivity; Interference; Magnetic fields; Magnetic liquids; Magnetooptic effects; Optical fiber sensors; Optical fibers; Hollow core fiber; contrast ratio; magnetic field; magnetic fluid;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2351834
