期刊
OPTICS LETTERS
卷 45, 期 16, 页码 4519-4522出版社
Optica Publishing Group
DOI: 10.1364/OL.401279
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资金
- National Natural Science Foundation of China [61775015, 61901429]
- Fundamental Research Funds for the CentralUniversities [2018JBZ109, 2020YJS003]
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. (C) 2020 Optical Society of America
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