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Variations of magnetic field measurement with an extrinsic Fabry-Perot interferometer by double-beam technique

机译：通过双光束技术用外在法布里 - 珀罗干涉仪测量磁场测量的变化

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The magnetic field variations were measured by a designed optical fiber magnetic field sensor based on the extrinsic Fabry-Perot interferometric sensor with both single and double beam techniques. Behavior of a giant magnetostrictive material Terfenol-D rod was examined at room temperature, under magnetic field variations and varying applied force. In both techniques, as the force increased, the full width half maximum of the peaks decreased; therefore, a larger number of bright and dark fringes occurred with the magnetic field. The displacements increase from 9.24 +/- 0.03 to 13.20 +/- 0.03 mu m for the single beam for 8.65, 9.75, 11.47 and 13.35 N. For the double beam, the displacements are found to be 3.69 +/- 0.02, 3.69 +/- 0.02, and 4.51 +/- 0.02 mu m for 8.65, 9.75, and 11.47, respectively. While Terfenol-D is under different forces, the orientations of magnetic domains are investigated. In summary, the magnetic field could be measured precisely at both short and long ranges by these techniques. (C) 2019 Elsevier Ltd. All rights reserved.
机译：磁场变化由基于具有单个和双光束技术的基于外在法布里 - 珀罗干涉传感器的设计的光纤磁场传感器测量。在磁场变化和不同施加的力下，在室温下检查巨型磁致伸缩材料Terfenol-D棒的行为。在这两种技术中，随着力的增加，峰的全宽半最大减小;因此，磁场发生了较大数量的明亮和黑暗的条纹。对于2.65,9.75,11.47和13.35 N和13.35 N.为单光束的9.24 +/- 0.03至13.20 +/-0.03μm增加。对于双梁，位移是3.69 +/- 0.02,3.69 + / - 0.02和4.51 +/- 0.02 mu m，分别为8.65,9.75和11.47。虽然Terfenol-D处于不同的力，但研究了磁性结构域的取向。总之，可以通过这些技术精确地测量磁场。 （c）2019年elestvier有限公司保留所有权利。

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