When a momentary large current in opposite directions flows through the two opposing spiral coils, strong magnetic field is generated coils. The creates an impact force between permanent magnet placed under of actuator enhanced because Lorentz by static field. In this paper, we introduce principle electromagnetic generation and calculation method force. fields coil are analyzed finite element m...

We report on the fabrication and characterization of a single-mode fiber variable optical attenuator (VOA) based on a ferrofluid shutter actuated by a magnetic field created by a low voltage electromagnet. We compare the performance of a VOA using oil-based ferrofluid, with one VOA using water-based 12 ferrofluid, and demonstrate broadband optical attenuation of up to 28 dB with polarization de...

We present a novel setup to measure the transverse magneto-optical Kerr effect in extreme ultraviolet spectral range based on fiber laser amplifier system with repetition rate between 100 and 300 kHz, which we use element-resolved demagnetization dynamics. The is equipped strong electromagnet cryostat, allowing measurements 10 420 K using magnetic fields up 0.86 T. performance of our demonstrat...

We introduce a novel contrast mechanism for optical coherence tomography (OCT) whereby the optical scattering of magnetically labeled cells is modified by means of an externally applied magnetic field. This modification is made through the addition of a small electromagnet to the imaging arm of a conventional OCT interferometer. We measure the magnetomotive OCT signal by differencing pairs of a...