Abstract
A novel, to the best of our knowledge, interrogation scheme based on an optoelectronic oscillator (OEO) with high sensitivity and high speed response for a fiber optical current sensor utilizing a reflective interferometer is proposed and experimentally demonstrated. Due to the Faraday effect, a magneto-optic phase shift induced by current variation is generated between two orthogonal light waves. The polarization-dependent properties of the Mach–Zehnder modulator are used to convert the magneto-optic phase shift into the phase difference between the optical carrier and sideband, which is then mapped to the oscillating frequency shift by closing an OEO loop. A high current sensitivity of 152.5 kHz/A with a range of 0–2.5 A is obtained in the experiment.
© 2020 Optical Society of America
Full Article | PDF ArticleMore Like This
Naihan Zhang, Muguang Wang, Beilei Wu, Mengyao Han, Jing Zhang, Yan Liu, and Guofang Fan
Opt. Express 29(24) 38989-39000 (2021)
Jing Zhang, Muguang Wang, Yu Tang, Qi Ding, Beilei Wu, Yuguang Yang, Hongqian Mu, Bin Yin, and Shuisheng Jian
Opt. Lett. 43(12) 2799-2802 (2018)
Yunjie Cheng, Yiping Wang, Zixuan Song, and Jing Lei
Opt. Express 28(23) 35264-35271 (2020)