Magneto-optical device

Details Magneto-optical device Magneto-optical device

2007-10-09

2007-10-09

Mack, Ricky (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S281000

Reexamination Certificate

active

10569097

ABSTRACT:
It is possible to reduce the size of a magneto-optical device, increase the speed of optical control, simplify power supply structure and its control, and maintain a Faraday rotation angle in an arbitrary state even after shut-off of the excitation current. The magneto-optical device includes a magnetic yoke (10) made of a high-permeability magnetic material, the magnetic yoke including a tabular portion (16) and four pillar portions (18) protruding from one side of the tabular portion (16), a coil (12) wound on each of the pillar portions, and a magneto-optical element (14) arranged in an open-magnetic-circuit region surrounded by the end portions of the four pillar portions. A magnetic field obtained by a coil is applied to the magneto-optical element.

REFERENCES:
patent: 6854125 (2005-02-01), Mizuno et al.
patent: 62-95515 (1987-05-01), None
patent: 9-33871 (1997-02-01), None
Akitoshi Mesaki et al., “Development of Fast Response Faraday Rotator”, Proceedings of the IEICE Conference, Mar. 8, 2004, vol. 2004, Electronics 1, p. 280.
Chiharu Nishida et al., “Development of Fast Response VOA”, Proceedings of the IEICE Conference, Mar. 8, 2004, vol. 2004, Electronics 1, p. 283.

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