Magnetic and optical element and its manufacturing method using the same optical device

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PROBLEM TO BE SOLVED : To provide a magneto-optical element of which the Faraday rotatation capacity to light in wavelength 1.3-1.6 μm band is around 45°, and which has a large value of backward insertion loss. SOLUTION : The magneto-optical element is constituted of a bismuth-substituted rare earth garnet crystal, has 350 μm or more thickness grown by a liquid epitaxial method not using a lead compound as a flux, contains platinum, and satisfies the relation that the formula amount x of platinum is 0.02≤xCOPYRIGHT : (C)2009, JPO&INPIT