Optical fiber ocean bottom vector magnetometer array

Wentao Zhang; Zhaogang Wang; Wenzhu Huang; Fang Li

doi:10.1117/1.OE.57.10.107106

30 October 2018 Optical fiber ocean bottom vector magnetometer array

Wentao Zhang, Zhaogang Wang, Wenzhu Huang, Fang Li

Author Affiliations +

Funded by: National Key R&D Program of China, National Natural Science Foundation of China (NSFC), Youth Innovation Promotion Association of CAS

Optical Engineering, Vol. 57, Issue 10, 107106 (October 2018). https://doi.org/10.1117/1.OE.57.10.107106

Abstract

An optical fiber ocean bottom vector magnetometer (OOBVM) array based on fiber laser sensing technology is proposed. The fiber laser is modulated at the natural frequency of the sensing structure by the Ampere force in the magnetic field. In this way, the sensitivity is enhanced and the effect of power fluctuation of fiber laser is eliminated. The test result shows that its magnetic field resolution is about 0.86 nT / √ Hz@100 mA. The design and assembly process of the OOBVM array are demonstrated. A field test in South China Sea demonstrated that the OOBVM array can detect the movement of ferromagnetic objects in water, which implies the potential for applications in underwater object detection and marine geophysics.

Citation Download Citation

Wentao Zhang, Zhaogang Wang, Wenzhu Huang, and Fang Li "Optical fiber ocean bottom vector magnetometer array," Optical Engineering 57(10), 107106 (30 October 2018). https://doi.org/10.1117/1.OE.57.10.107106

Received: 27 June 2018; Accepted: 9 October 2018; Published: 30 October 2018

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