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US 8,411,536 B1Granted
Light delivery guide
AssigneeSeagate Technology LLC
InventorChubing Peng
Life of this patent
Estimating the term…
Abstract
A waveguide that includes a first cladding layer, the first cladding layer having an index of refraction, n3; a gradient index layer positioned adjacent the first cladding layer; an assist layer positioned adjacent the gradient index layer, the assist layer having an index of refraction, n2; a core layer positioned adjacent the assist layer, the core layer having an index of refraction, n1; and a second cladding layer, the second cladding layer having an index of refraction, n4, wherein n1 is greater than n2, n3, and n4; and n2 is greater than n3 and n4.
Claims20
A waveguide comprising:
- a first cladding layer, the first cladding layer having an index of refraction, n3;
- a gradient index layer positioned adjacent the first cladding layer;
- an assist layer positioned adjacent the gradient index layer, the assist layer having an index of refraction, n2;
- a core layer positioned adjacent the assist layer, the core layer having an index of refraction, n1;
- and
- a second cladding layer, the second cladding layer having an index of refraction, n4,
- wherein n1 is greater than n2, n3, and n4;
- and n2 is greater than n3 and n4.
5 more elements
A head comprising:
- a light source;
- and
- a waveguide comprising:
- a first cladding layer, the first cladding layer having an index of refraction, n3;
- a gradient index layer positioned adjacent the first cladding layer;
- an assist layer positioned adjacent the gradient index layer, the assist layer having an index of refraction, n2;
- a core layer positioned adjacent the assist layer, the core layer having an index of refraction, n1;
- and
- a second cladding layer, the second cladding layer having an index of refraction, n4,
- wherein n1 is greater than n2, n3, and n4;
- and n2 is greater than n3 and n4,
- wherein the light source and the waveguide are configured so that light from the light source is directed into the waveguide.
9 more elements
A disc drive comprising:
- at least one actuator arm having a flexure;
- at least one head, wherein each flexure has a head at the distal end thereof and wherein each head comprises:
- a light source;
- and
- a waveguide comprising:
- a first cladding layer, the first cladding layer having an index of refraction, n3;
- a gradient index layer positioned adjacent the first cladding layer;
- an assist layer positioned adjacent the gradient index layer, the assist layer having an index of refraction, n2;
- a core layer positioned adjacent the assist layer, the core layer having an index of refraction, n1;
- and
- a second cladding layer, the second cladding layer having an index of refraction, n4,
- wherein n1 is greater than n2, n3, and n4;
- and n2 is greater than n3 and n4,
- wherein the light source and the waveguide are configured so that light from the light source is directed into the waveguide;
- a magnetic reader;
- and
- a magnetic writer.
14 more elements
Dependencies are inferred from the claim text.