G - Physics
02
F
G02F 1/095 (2006.01) G01R 33/032 (2006.01) G02B 27/28 (2006.01) G02F 1/09 (2006.01)
Patent
CA 2131124
ABSTRACT OF THE DISCLOSURE The present invention provides a means of erasing the magnetic hysteresis with respect to a rare-earth iron garnet single-crystal film with large magnetic hysteresis which is an obstacle in using as a Faraday rotator although the film has extremely small saturated magnetic field intensity. In the present invention, a permanent magnet is posi- tioned on a part of a rare-earth iron garnet single crystal. According to the present invention, the magnetic hystere- sis can be erased with respect to a rare-earth iron garnet single-crystal film with large magnetic hysteresis which is an obstacle in using as a Faraday rotator although the film has extremely small saturated magnetic field intensity. As the re- sult, an optical switch utilizing Faraday effect and a magneto- optical sensor with a Faraday rotator applied a rare-earth iron garnet single-crystal film which has small saturated magnetic field intensity are enabled to utilize practically.
Shirai Kazushi
Takeda Norio
Mitsubishi Gas Chemical Company Inc.
Robic
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