Optical disc data storage system using optical waveguide
AssigneeSeagate Technology LLC
InventorsGregory S. Mowry, Roger K. Malmhall
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Abstract
An optical disc data storage system includes an optical disc for storing information in an optically readable format on a data surface. The slider is positioned proximate the data surface of the optical disc. An actuator coupled to the slider selectively positions the slider relative to the data surface. An optical waveguide having a radially graded index of refraction extends between a first end positioned proximate the light source and a second end coupled to the slider and positioned proximate the data surface. The optical fiber carries light therebetween.
Claims10
An optical disc data storage system, comprising:
- an optical disc for storing information in an optically reliable format on a data surface;
- a slider proximate the data surface of the optical disc;
- a light source;
- and
- an optical waveguide coupled to the slider having a radially graded index of refraction, the optical waveguide having a proximal end adjacent the light source and a distal end coupled to the slider and having an axis directed substantially toward the data surface to transmit light therebetween, the optical waveguide having a length whereby light incident on the proximal end is directed substantially toward a spot located on the distal end, wherein a distance between the distal end of the waveguide and the data surface is sufficiently small to provide coupling through an evanescent field between the spot and the data surface.
Dependencies are inferred from the claim text.