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US 12,087,338 B1Granted
HAMR read-write head with coupler and waveguide
AssigneeSeagate Technology LLC
InventorsChristopher Neil Harvey, Aidan Dominic Goggin, Chuan Zhong
Life of this patent
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Abstract
Described are heat assisted magnetic read-write heads that include a coupler, a waveguide, a transducer, and appurtenant structures.
Claims20
An apparatus comprising:
- an optical coupler that receives light from a light source at a coupler input facet, the optical coupler having a length that extends from the coupler input facet in a direction of light propagation through the optical coupler,
- a waveguide coupled to the optical coupler along the length of the optical coupler at a coupler-waveguide interface, wherein the coupler-waveguide interface is spaced a distance in a range from 1 to 30 microns from the coupler input facet, and
- a near-field transducer coupled to the waveguide, that provides electromagnetic heating for a heat assisted magnetic recording write head.
An apparatus comprising:
- an optical coupler that receives light from a light source at a coupler input facet, the optical coupler having a length that extends from the coupler input facet in a direction of light propagation through the optical coupler, wherein the optical coupler has a straight portion having a length in a range from 40 to 120 microns,
- a waveguide coupled to the optical coupler along the length of the optical coupler at a coupler-waveguide interface, the coupler-waveguide interface being spaced from the coupler input facet, and
- a near-field transducer coupled to the waveguide, that provides electromagnetic heating for a heat assisted magnetic recording write head.
An apparatus comprising:
- an optical coupler that receives light from a light source at a coupler input facet, the optical coupler having a length that extends from the coupler input facet in a direction of light propagation through the optical coupler, wherein the optical coupler comprises:
- a thickness in a range from 0.5 to 2 microns, and
- a width in a range from 2 to 6 microns,
- a waveguide coupled to the optical coupler along the length of the optical coupler at a coupler-waveguide interface, the coupler-waveguide interface being spaced from the coupler input facet, and
- a near-field transducer coupled to the waveguide, that provides electromagnetic heating for a heat assisted magnetic recording write head.
2 more elements
Dependencies are inferred from the claim text.