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    Faraday rotator and optical device comprising the same, and antireflection film and optical device comprising the same
    1.
    发明授权
    Faraday rotator and optical device comprising the same, and antireflection film and optical device comprising the same 有权
    法拉第旋转器和包括该法拉第旋转器的光学装置，以及防反射膜和包括该反射膜的光学装置

    公开(公告)号：US06853473B2

    公开(公告)日：2005-02-08

    申请号：US10347264

    申请日：2003-01-21

    申请人： Atsushi Ohido ,  Kenichi Tohchi ,  Kazuhito Yamasawa ,  Shinichiro Kakei

    发明人： Atsushi Ohido ,  Kenichi Tohchi ,  Kazuhito Yamasawa ,  Shinichiro Kakei

    IPC分类号： G02F1/00 ,  G02F1/09

    CPC分类号： G02F1/09 ,  G02F1/0036

    摘要： The invention relates to an optical device for polarizing light by changing its Faraday rotation angle, such as optical attenuators, optical switches or polarization controllers; and its object is to provide such an optical device which can be driven even by small-sized and power-saving magnetic circuits and in which the insertion loss in the Faraday rotator may be reduced. The optical device comprises a Faraday rotator formed of a garnet single crystal, and a magnetic circuit applying an external magnetic field H that is smaller than the saturation magnetic field Hs of the Faraday rotator to the Faraday rotator.

    摘要翻译： 本发明涉及通过改变其法拉第旋转角来偏振光的光学装置，例如光衰减器，光开关或偏振控制器; 其目的在于提供即使由小型省电磁路驱动的光学装置，也可以减小法拉第转子的插入损耗。 光学装置包括由石榴石单晶形成的法拉第旋转器，以及将小于法拉第旋转器的饱和磁场Hs的外部磁场H施加到法拉第旋转器的磁路。