PROGRESSIVE WAVE COUPLING TYPE LIGHT WAVE AND MILLIMETER WAVE CIRCULATOR APPLYING FARADAY EFFECT

摘要

PURPOSE:To realize the light wave and millimeter wave circulrator of a small size and high performance having no deviated wave dependency by butting signal wave transmission lines axially parallel in close contact with a columnar medium such as optical magnetic material showing Faraday effect and coupling and radiating the transmission waves continuously into the columnar medium. CONSTITUTION:For light waves, three glass fiber lines 11, 11', 11'' are connected to the outside circumference of an optical magnetic material cylindrical column 10 by having an angle of 120 deg. with each other and in parallel with the symmetrical axis LL'. The one side of the clads 11b, 11'b, 11''b of these lines is cut off so that their core portions 11a, 11'a, 11''a contact the magnetic material circular cylinder 10. A DC bias magnetic field HDC is applied to the magnetic material circular column 10 parallel to the Z axis. For millimeter waves and sub-millimeter waves, waveguides for single mode or waveguides for EH waves of rectangular parallelopiped are used for the coupling lines. In order to couple the line transmission waves from the waveguide lines 23 to the ferromagnetic material circuar column 22, dielectric coupling parts 24 are placed between the ferromagnetic material circular column 22 and the lines 23.