MAGNETO-OPTICAL MATERIAL, FARADAY ROTATOR, AND OPTICAL ISOLATOR

It is an object of the present invention to provide a magneto-optical material containing as a main component an oxide that includes a terbium oxide and having a large Verdet constant at a wavelength in the 1.06 µm region (0.9 to 1.1 µm) and high transparency, and to provide a small-sized optical is...

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Bibliographische Detailangaben
Hauptverfasser:	MAKIKAWA SHINJI, YAMANAKA AKIO, NARUSE HIROTAKA, WATANABE TOSHIAKI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE APPARATUS THEREFOR BASIC ELECTRIC ELEMENTS CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS CRYSTAL GROWTH CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING DEVICES USING STIMULATED EMISSION ELECTRICITY FREQUENCY-CHANGING INORGANIC CHEMISTRY MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PERFORMING OPERATIONS PHYSICS PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE REFINING BY ZONE-MELTING OF MATERIAL SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE SINGLE-CRYSTAL-GROWTH SOLDERING OR UNSOLDERING TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TRANSPORTING UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	It is an object of the present invention to provide a magneto-optical material containing as a main component an oxide that includes a terbium oxide and having a large Verdet constant at a wavelength in the 1.06 µm region (0.9 to 1.1 µm) and high transparency, and to provide a small-sized optical isolator suitably used in a fiber laser for a processing machine. The magneto-optical material of the present invention contains an oxide represented by Formula (I) below at a content of at least 99 wt%, (Tb x R 1-x ) 2 O 3 (I) wherein x satisfies 0.4 ¤ x ¤ 1.0 and R includes at least one element selected from the group consisting of scandium, yttrium, and lanthanoid elements other than terbium.