Magneto-optical devices

Details Magneto-optical devices Magneto-optical devices

2006-02-21

2006-02-21

Spector, David N. (Department: 2873)

Optical: systems and elements

Optical modulator

Having particular chemical composition or structure

C359S281000, C359S283000

Reexamination Certificate

active

07002732

ABSTRACT:
The invention provides small-sized, power-saving and easily-producible magneto-optical devices. The magneto-optical device comprises a Faraday rotator having nearly parallel surfaces and a Z-direction magnetic easy axis; a total reflection film formed partly on one surface of the Faraday rotator; another total reflection film formed partly on the other surface thereof; a light input region through which light enters the Faraday rotator; a light output region through which the light having alternately reflected on the total reflection films goes out of the Faraday rotator; a permanent magnet that forms a predetermined magnetic domain structure in the Faraday rotator and applies a magnetic field component in the Z-direction to the Faraday rotator so that the magnetization direction could be the same both in the light input region and the light output region; and an electromagnet that varies the position at which the magnetic field component applied to the Faraday rotator is 0 (zero).

REFERENCES:
patent: 3420601 (1969-01-01), Young et al.
patent: 4239337 (1980-12-01), Campbell et al.
patent: 5657151 (1997-08-01), Swan et al.
patent: A 6-51255 (1994-02-01), None
patent: A 7-199137 (1995-08-01), None
Ikeda et al., “Arbitrary and Endless Polarization Controller,” Furukawa review, No. 23, pp. 32-38, Jan. 2003 w/English Translation.

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