Magneto-optical fiber sensor based on magnetic fluid

• Main Authors: Zu, Peng, Chan, Chi Chiu, Lew, Wen Siang, Jin, Yongxing, Zhang, Yifan, Liew, Hwi Fen, Chen, Li Han, Wong, Wei Chang, Dong, Xinyong
• Other Authors: School of Chemical and Biomedical Engineering
• Format: Article
• Language: English
• Published: 2013
• Online Access: https://hdl.handle.net/10356/99571; http://hdl.handle.net/10220/10950
• Institution: Nanyang Technological University

A novel magnetic field fiber sensor based on magnetic fluid is proposed. The sensor is configured as a Sagnac interferometer structure with a magnetic fluid film and a section of polarization maintaining fiber inserted into the fiber loop to produce a sinusoidal interference spectrum for measurement. The output interference spectrum is shifted as the change of the applied magnetic field strength with a sensitivity of 16.7 pm/Oe and a resolution of 0.60 Oe. The output optical power is varied with the change of the applied magnetic field strength with a sensitivity of 0.3998 dB/Oe.