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. 2019 Jun 27;19(13):2860. doi: 10.3390/s19132860

Figure 7.

Figure 7

(a) Magnetic field sensing system based on etched FBG immersed into magnetic fluid (MF) and the responses of sensors with different FBG diameters to magnetic intensity [51] and (b) Sensing system based on Long period fiber grating (LFBG) and the relationship between output power of transmission light and magnetic field strength [52]; permission conveyed through the Copyright Clearance Center, Inc.