Grating assisted surface emitter laser coupling for heat assisted magnetic recording
AssigneeSeagate Technology LLC
InventorLifu Zhou
Life of this patent
Estimating the term…
Abstract
An apparatus includes a waveguide, a laser diode positioned adjacent to the waveguide and having an active region producing light in a plane substantially parallel to a plane of the waveguide, a first grating positioned to couple light out of the laser diode and to direct the light toward the waveguide, a reflective layer positioned adjacent to a side of the first grating opposite to the waveguide, and a second grating having the same period as the first grating and positioned to couple light into the waveguide. A data storage device that includes the apparatus is also provided.
Claims20
An apparatus comprising:
- a waveguide;
- a laser diode positioned adjacent to the waveguide and having an active region producing light in a plane substantially parallel to and above a plane of the waveguide;
- a first grating positioned to couple light out of the laser diode and to direct the light toward the waveguide;
- a reflective layer positioned adjacent to a side of the first grating opposite to the waveguide;
- and
- a second grating having the same period as the first grating and positioned to couple light into the waveguide.
An apparatus comprising:
- a waveguide;
- a laser diode positioned adjacent to the waveguide and having an active region producing light in a plane substantially parallel to a plane of the waveguide;
- a first grating positioned to couple light out of the laser diode and to direct the light toward the waveguide;
- a reflective layer positioned adjacent to a side of the first grating opposite to the waveguide, wherein the first grating is positioned between the reflective layer and a substrate;
- and
- a second grating having the same period as the first grating and positioned to couple light into the waveguide.
An apparatus comprising:
- a data storage medium;
- a recording head including
- a waveguide,
- a laser diode positioned adjacent to the waveguide and having an active region producing light in a plane substantially parallel to a plane of the waveguide, wherein the plane of the active region of the laser diode and the plane of the waveguide are separated from one another,
- a first grating positioned to couple light out of the laser diode and to direct the light toward the waveguide,
- a reflective layer positioned adjacent to a side of the first grating opposite to the waveguide, and
- a second grating having the same period as the first waveguide and positioned to couple light into the waveguide;
- and an arm for positioning the recording head with respect to the data storage medium.
An apparatus comprising:
- a structure including a p-side layer and an n-side layer on opposite sides of an active region;
- a reflective coating on a first end of the structure;
- a rough surface or an anti-reflection coating on a second end of the structure, wherein the first end of the structure is opposite the second end of the structure;
- an output grating positioned adjacent to the active region;
- and
- a partial reflection grating adjacent to the output grating.
Dependencies are inferred from the claim text.