| 摘要 |
PROBLEM TO BE SOLVED: To obtain stable optical characteristics by suppressing temperature rise of a Faraday element without spoiling the function of an optical isolator. SOLUTION: An isolator holder 2 is stored in an outside heat conductive cover member 3, and a magneto-optical crystal film 12, first and second heat conductive parts 6, 7, 8, and 9, polarizers 15 and 16, and a magnet 18 are disposed in the isolator holder 2, and bendable radiation fins 10 and 11 are provided in a part of the second heat conductive parts 8 and 9, and the first heat conductive parts 6 and 7 are attached to both faces of the magneto-optical crystal film 12, and the second heat conductive parts 8 and 9 are disposed on the outside of the first heat conductive parts, and the radiation fins 10 and 11 are passed through guide opening parts 2a, 2b of the isolator holder 2 and guided to the the outside of the outside heat conductive cover member from the drawing opening 3c of the outside heat conductive cover member, and outer end parts 10a and 11a are brought into contact with external grooves 4d and 5d. COPYRIGHT: (C)2007,JPO&INPIT
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