Optical waveguide magnetic bubble detection

Details Optical waveguide magnetic bubble detection Optical waveguide magnetic bubble detection

1975-03-17

1976-12-07

Moffitt, James W.

Communications: electrical

Digital comparator systems

340174YC, 350151, 350 96WG, G11C 1114, G11C 1142

Patent

active

039965767

ABSTRACT:
A magnetic bubble detector utilizing a thin film optical waveguide. Light is optically coupled into the guide for propagation of linearly polarized light along a first axis thereof. Magnetic bubbles from a memory storage location are moved past the sensor on a second axis transverse the first. A sensor is provided for sensing changes in the polarization mode of the light propagating along the axis of the waveguide. The sensor includes an optical device for coupling light out of the waveguide. The passage of a magnetic bubble along the second axis past the waveguide will modulate the polarized light by the fringing field of the bubble and provide a light output signal from the sensor indicating the passage of each bubble.

REFERENCES:
patent: 3830555 (1974-08-01), Warner
patent: 3859643 (1975-01-01), Borrelli

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