Magneto-optical component

Details Magneto-optical component Magneto-optical component

2005-01-21

2008-10-28

Connelly-Cushwa, M. R. (Department: 2874)

Optical waveguides

Directional optical modulation within an optical waveguide

Magneto-optic

C359S283000, C359S281000

Reexamination Certificate

active

07444040

ABSTRACT:
The invention relates to a magneto-optical component, such as a variable light attenuator, light modulator or optical switch, having small size, low power consumption and high speed. The magneto-optical component comprises at least one Faraday rotator comprising a magnetic domain A with magnetization in a direction perpendicular to a light incident/exit surface, a magnetic domain B with magnetization in a direction opposite to the magnetization direction of the magnetic domain A, a planar magnetic domain wall as a boundary between the magnetic domain A and the magnetic domain B, and two light transmission regions through which a plurality of light beams comprising identical traveling directions are transmitted respectively and whose distances from the magnetic domain wall are almost equal to each other, and a magnetic field application system for applying a variable magnetic field to the Faraday rotator to make a position of the magnetic domain wall variable.

REFERENCES:
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patent: 5889609 (1999-03-01), Fukushima
patent: 6018411 (2000-01-01), Fukushima et al.
patent: 6018412 (2000-01-01), Fukushima
patent: 6198567 (2001-03-01), Bergmann
patent: 6333806 (2001-12-01), Onaka et al.
patent: 6833941 (2004-12-01), Iwatsuka
patent: 2004/0027639 (2004-02-01), Iwatsuka
patent: 2815509 (1998-08-01), None
patent: 2004-133387 (2004-04-01), None

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