This invention provides a transparent magnetooptical material that is suitable for use in a magnetooptical device such as an optical isolator.

A terbium paramagnetic garnet single crystal having a strong Faraday effect, a high transmittance to light in the visible region and a large Verdet constant, and a magneto-optical device using the single crystal are disclosed.

The entire surface of the magneto-optical device is flattened.

A magneto-optical device includes a waveguide structure that has at least one cladding region and core region.

Also disclosed is a small-sized magneto-optical device which is suitable for use in a fiber laser for a processing machine.

Method of manufacturing a magneto-optical device, wherein at least one coil (3) is embedded in an oxide layer (2), wherein the oxide layer (2) is provided with at least one aperture (4).

In a magneto-optical storage device, a digitally adjustable preamplifier stage balances polarization signal levels through use of a digital compensation value.

Each probe (40, 62) includes a photoelectric conversion device (42, 64), an LC resonant circuit (44, 66), and a magnetooptic device (46, 68) for generating the responsive output light signal to the input light signal.

A magneto-optical device is disclosed that includes a non-magnetic support body and a fine particle arrangement layer on the non-magnetic support body.