Ferrofluid optical switches

Details Ferrofluid optical switches Ferrofluid optical switches

1980-06-30

1983-05-24

Moore, David K.

350267, 350360, G02B 514

Patent

active

043847617

ABSTRACT:
A controllable magnetic field influences the position or shape or density distribution of a ferrofluid so that the ferrofluid causes or prevents the coupling of light between optical paths either by physically causing movement of a waveguide (e.g., optical fiber) or by itself physically moving into or out of a coupling region between optical paths.

REFERENCES:
patent: 3381248 (1968-04-01), Furth
patent: 3906415 (1975-09-01), Baker
patent: 3910687 (1975-10-01), Iwata
patent: 4035637 (1977-07-01), Lenhart et al.
patent: 4082435 (1978-04-01), Zeitz
patent: 4121884 (1978-10-01), Greenwood
Magnetic Fluid, Ferrofluidics Corp., Burlington, Mass., Apr. 73, pp. 17-18.
Kaiser et al., Some Applications of Ferrofluid Magnetic Colloids, IEEE Trans., vol. Mag. 6, No. 3, 9/70.
Raj et al., Magnetic Fluid Seals Laser Focus, 4/79, pp. 56-61.
Leighton, Fiber Optic Shutter, IBM Technical Disclosure Bulletin, _vol. II, No. 8, Jan. 1969.

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