Abstract

A magneto-optic modulator with a magnetic fluid film inserted into an optical fiber Sagnac interferometer is proposed. The magnetic fluid exhibits variable birefringence and Faraday effect under external magnetic field that will lead to a phase difference and polarization state rotation in the Sagnac interferometer. As a result, the intensity of the output light is modulated under the external magnetic field. Moreover, the modulator has a high extinction ratio and can easily be integrated in a single-mode fiber system. The performance of the modulator is not affected by ambient temperature variation from room temperature to $40°\mathrm{C}$.

© 2011 Optical Society of America

Magneto-optical fiber sensor based on magnetic fluid

Peng Zu, Chi Chiu Chan, Wen Siang Lew, Yongxing Jin, Yifan Zhang, Hwi Fen Liew, Li Han Chen, Wei Chang Wong, and Xinyong Dong
Opt. Lett. 37(3) 398-400 (2012)

Fiber magnetic-field sensor based on nanoparticle magnetic fluid and Fresnel reflection

Luan Xiong Chen, Xu Guang Huang, Jia Hu Zhu, Guang Can Li, and Sheng Lan
Opt. Lett. 36(15) 2761-2763 (2011)

Designing optical-fiber modulators by using magnetic fluids

H. E. Horng, J. J. Chieh, Y. H. Chao, S. Y. Yang, Chin-Yih Hong, and H. C. Yang
Opt. Lett. 30(5) 543-545 (2005)

All-fiber magneto-optic Sagnac interferometer

Feng Wen, Bao-jian Wu, and Te Luo
Appl. Opt. 50(19) 3123-3127 (2011)

Magnetic field sensor using tilted fiber grating interacting with magnetic fluid

Jie Zheng, Xinyong Dong, Peng Zu, Li-Yang Shao, Chi Chiu Chan, Ying Cui, and Perry Ping Shum
Opt. Express 21(15) 17863-17868 (2013)