| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a Faraday isolator that maintains satisfactory extinction characteristics with respect to return light beam even when used in a laminated semiconductor laser array. <P>SOLUTION: A Faraday isolator 3 comprises: a plurality of heat sink substrates 12 composed of non-magnetic material that are arranged so as to be parallel to each other; multiple layers of Faraday rotators 10 placed on respective multiple layers of the heat sink substrates 12; a magnet 9 for applying a magnetic field to the multiple layers of the Faraday rotators 10 in a direction along the surfaces of the heat sink substrates 12; a first and second polarization plate 5, 8 that are arranged in the direction of the magnetic field with respect to the multiple layers of the Faraday rotators 10, and placed so as to sandwich the multiple layers of the Faraday rotators 10; and heat sink support plates 11 composed of non-magnetic material that are connected to end surfaces 12a of the multiple layers of the heat sink substrates 12 to support the heat sink substrates 12. <P>COPYRIGHT: (C)2012,JPO&INPIT |
