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Schematic of a new type of Mach-Zehnder interferential magnetic sensor is illustrated. TbDyFe is used as the magnetostrictive material which is coated on the round surface of the sensing optical fiber. The deposition experiments are done using electron beam evaporation system. Three main process parameters, temperature, vacuum and deposition rate, which affect the TbDyFe deposition quality seriously,...
A sensitive DC magnetic field sensor based on magnetostrictive straining of optical fibers was demonstrated, which utilizes alternating current phase tracing (PTAC) homodyne scheme to eliminate phase drift. Comparison was carried out experimentally between direct current phase tracing (PTDC) and alternating current phase tracing, then expressions were presented. The results showed that the PTAC had...
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