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1 November 1994 Magnetostrictive transducers for optical fiber magnetic field sensors
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Various metallic glass ribbons made of Co70Fe10B20, Co76Fe4B20, Co80B20 and Ni are developed using the melt-spinning technique and their magnetic properties, affecting the performance of a typical interferometric optical fiber magnetic field sensor, are tested. By bonding the metallic ribbons to a single mode fiber arm, a typical interferometric fiber optic magnetic field sensing system is constructed. The ac magnetostrictive responses for the metallic glasses measured with the fiber optic sensing system show that the dc bias field for the maximum response with a Co70Fe10B20 ribbon is approximately 0.97 Oe and that with a Ni ribbon is 23 Oe. The Co70Fe10B20- and Ni-transducer exhibit maximum magnetostriction near 0.5 kHz while the Co76Fe4B20 transducer demonstrates peak response at 0.9 kHz AND 12 kHz. The measured effective magnetostrictive parameters and saturation magnetostrictions are 2 X 10-7/Oe2 approximately 3 X 10-7/Oe2 and -4.6 X 10-6 approximately 5.7 X 10-6, respectively. Typical optical fiber sensors exhibit minimum detectable fields of the order of approximately 10-5 Oe(rms)/(root)Hz.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kyung-Shik Lee, Yu Sheop Lee, and Su Jeong Suh "Magnetostrictive transducers for optical fiber magnetic field sensors", Proc. SPIE 2292, Fiber Optic and Laser Sensors XII, (1 November 1994);

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