MAGNETO-OPTICAL DEVICE

摘要

It is possible to reduce the size of a magneto-optical device, increase the speed of optical control, simplify power supply structure and its control, and maintain a Faraday rotation angle in an arbitrary state even after shut-off of the excitation current. The magneto-optical device includes a plate-shaped section (16) and four columnar sections (18) protruding from one side of the plate-shaped section (16) which form a unitary block, a magnetic yoke (10) made of a high-permeability magnetic material, a coil (12) wound on each of the columnar sections, and a magneto-optical element (14) arranged in an open magnetic circuit region surrounded by the end portions of the four columnar sections. A magnetic field obtained by a coil is applied to the magneto-optical element.