Search results for "Magneto-optic effect"
showing 3 items of 3 documents
Noncontact speckle-based optical sensor for detection of glucose concentration using magneto-optic effect
2016
We experimentally verify a speckle-based technique for noncontact measurement of glucose concentration in the bloodstream. The final device is intended to be a single wristwatch-style device containing a laser, a camera, and an alternating current (ac) electromagnet generated by a solenoid. The experiments presented are performed in vitro as proof of the concept. When a glucose substance is inserted into a solenoid generating an ac magnetic field, it exhibits Faraday rotation, which affects the temporal changes of the secondary speckle pattern distributions. The temporal frequency resulting from the ac magnetic field was found to have a lock-in amplification role, which increased the observ…
Faraday effect in magnetic fluids at a frequency 10GHz
2002
Abstract This work presents some results of observed Faraday effect in magnetic fluids in the centimetric region of the electromagnetic spectrum. The effect is observed when a transversal electric wave of mode H11 propagates in the circular waveguide with a magnetic fluid. The constant magnetic field was applied along the waveguide. Magnetic fluids with different concentrations of magnetite core nanoparticles suspended in tetradecane (C14H30) are used in the magnetic fields from 0 to 1500 Oe. A 160° rotation of wave polarization is obtained for a 200 mm sample.