US Patent 7259913 Faraday rotator for high output lasers

Patent 7259913 was granted and assigned to Sumitomo Metal Mining Co., Ltd. on August, 2007 by the United States Patent and Trademark Office.

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Junji Iida0

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US Patent 11754866 Gas cooled faraday rotator and method

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Patent abstract

A Faraday rotator in which the isolation function based on a temperature rise is not deteriorated even when the Faraday rotator is used for a high output laser of not smaller than 1W output at a wavelength of not larger than 1.1 μm includes sapphire crystals or rutile crystals bonded as radiation substrates to the incident side and outgoing side of a bismuth substituted type rare earth metal iron garnet crystal (RIG) film, the thickness of the RIG film being not smaller than 130 μm and not larger than 200 μm.

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