Micro optical fiber magnetic field sensor based on magnetostrictive material and preparation method
A technology of magnetostrictive materials and magnetic field sensors, which is applied to the use of magneto-optical equipment for magnetic field measurement, the size/direction of the magnetic field, and the direction of instruments. The effect of improving the response sensitivity
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[0035] The technical solutions of the present invention will be further described below with reference to the accompanying drawings.
[0036] Depend on figure 1 It can be seen that the micro-fiber magnetic field sensor based on magnetostrictive material according to the present invention has a structure including a single-mode fiber pigtail 1, an optical fiber waist region 2, an optical fiber transition region 3, a PDMS film 4, a Terfenol-D film 5, Tapered multimode fiber 6; multimode fiber 6 is tapered to about 9 microns in diameter at the waist region; single-mode fiber pigtail 1 is spliced at both ends of the multimode fiber; PDMS film is cured on the surface of the microfiber by sweep coating as a stress conduction layer ; Terfenol-D film overlaid on PDMS film.
[0037] Among them, the single-mode fiber pigtail 1 is an optical waveguide, preferably a single-mode fiber; the PDMS film 4 is prepared by the PDMS solution sweep coating method, with a preferred thickness of 1...
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