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This paper presents the design, fabrication and testing of a fiber optic switch actuated electromagnetically. The
ferromagnetic gel coated optical fiber is actuated using external electromagnetic fields. The ferromagnetic gel consists of
ferromagnetic powders dispersed in epoxy. The fabrication utilizes a simple cost-effective coating setup. A direct
fiberto-fiber alignment eliminates the need for complementary optical parts and the displacement of fiber switches the laser
coupling. The magnetic characteristics of magnetized ferromagnetic materials are performed using alternating gradient
magnetometer and the magnetic hysteresis curves are measured for different ferromagnetic materials including iron,
cobalt, and nickel. Optical fiber switches with various fiber lengths are actuated and their static and dynamic responses
for the same volume of ferromagnetic gel are summarized. The highest displacement is 1.345 mm with an input current
of 260mA. In this paper, the performance of fiber switches with various coating materials is presented.
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Praveen Pandojirao-S, Naresh Dhaubanjar, Pratibha C. Phuyal, Mu Chiao, J.-C. Chiao, "An electromagnetically actuated fiber optic switch using magnetized ferromagnetic materials," Proc. SPIE 6836, MEMS/MOEMS Technologies and Applications III, 683616 (4 January 2008); https://doi.org/10.1117/12.758063