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.
Original language | English |
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Pages (from-to) | 4519-4522 |
Number of pages | 4 |
Journal | Optics Letters |
Volume | 45 |
Issue number | 16 |
DOIs | |
Publication status | Published - 15 Aug 2020 |
Externally published | Yes |