OPTICAL ISOLATOR

The present invention is an optical isolator including a Faraday rotator including a trivalent ion exchange TAG (terbium-aluminum garnet), andarranged around the Faraday rotator, a central hollow magnet and a first and a second hollow magnet units arranged to sandwich the central hollow magnet in an...

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Bibliographic Details
Main Authors YAHAGI, Akira, IKARI, Masanori, MATSUMOTO, Takuto
Format Patent
LanguageEnglish
French
German
Published 20.07.2022
Subjects
BASIC ELECTRIC ELEMENTS
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
ELECTRICITY
FREQUENCY-CHANGING
INDUCTANCES
MAGNETS
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICAL LOGIC ELEMENTS
OPTICS
PHYSICS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
TRANSFORMERS
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Summary:The present invention is an optical isolator including a Faraday rotator including a trivalent ion exchange TAG (terbium-aluminum garnet), andarranged around the Faraday rotator, a central hollow magnet and a first and a second hollow magnet units arranged to sandwich the central hollow magnet in an optical axis direction,where a magnetic flux density B [T] in the Faraday rotator andan optical path length L [mm] where the Faraday rotator is arranged satisfy 0<Band 14.0≤L≤24.0This provides an optical isolator that, compared with a conventional Faraday rotator such as a terbium-gallium garnet (TGG) crystal, contributes to reduction of a thermal lensing effect, being a pending problem, in a high-output fiber laser.
Bibliography:Application Number: EP20190877050