Optical devices including assistant layers
AssigneeSeagate Technology LLC
InventorChubing Peng
Life of this patent
Estimating the term…
Abstract
A waveguide including a top cladding layer, the top cladding layer including a material having an index of refraction, n1; an assistant layer, the assistant layer positioned adjacent the top cladding layer, the assistant layer including a material having an index of refraction, n2; a core layer, the core layer positioned adjacent the assistant layer, the core layer including a material having an index of refraction, n3; and a bottom cladding layer, the bottom cladding layer positioned adjacent the core layer, the bottom cladding layer including a material having an index of refraction, n4, wherein n1 is less than both n2 and n3, n3 is greater than n1 and n4, and n4 is less than n3 and n2.
Claims20
A waveguide comprising:
- a top cladding layer, the top cladding layer comprising a material having an index of refraction, n1;
- an assistant layer, the assistant layer positioned adjacent the top cladding layer, the assistant layer comprising a material having an index of refraction, n2;
- a core layer, the core layer positioned adjacent the assistant layer, the core layer comprising a lower core layer having a lower core layer index of refraction and an upper core layer having an upper core layer index of refraction, wherein the upper core layer is adjacent the assistant layer and;
- and
- a bottom cladding layer comprising a material having an index of refraction, n4, and wherein the lower core layer is positioned adjacent the bottom cladding layer
- wherein n1 is less than n2, and n4 is less n2.
An apparatus comprising:
- a magnetic pole;
- a near field transducer-heat sink (NFT-HS), the NFT-HS positioned adjacent the magnetic pole, the NFT-HS having an air bearing surface and an opposing back surface;
- and
- a waveguide, the waveguide comprising:
- a top cladding layer, the top cladding layer comprising a material having an index of refraction, n1;
- an assistant layer, the assistant layer positioned adjacent the top cladding layer, the assistant layer comprising a material having an index of refraction, n2;
- a core layer, the core layer positioned adjacent the assistant layer, the core layer comprising a lower core layer having a lower core layer index of refraction and an upper core layer having an upper core layer index of refraction, wherein the upper core layer is adjacent the assistant layer and;
- and
- a bottom cladding layer comprising a material having an index of refraction, n4, and wherein the lower core layer is positioned adjacent the bottom cladding layer
- wherein n1 is less than n2, and n4 is less n2,
- wherein the top cladding layer of the waveguide is positioned adjacent the magnetic pole and the back surface of the NFT-HS and the assistant layer of the waveguide is positioned adjacent the back surface of the NFT-HS.
A device comprising:
- a light source;
- a near field transducer-heat sink (NFT-HS);
- and
- a waveguide, the waveguide comprising:
- a top cladding layer, the top cladding layer comprising a material having an index of refraction, n1;
- an assistant layer, the assistant layer positioned adjacent the top cladding layer, the assistant layer comprising a material having an index of refraction, n2;
- a core layer, the core layer positioned adjacent the assistant layer, the core layer comprising a lower core layer having a lower core layer index of refraction and an upper core layer having an upper core layer index of refraction, wherein the upper core layer is adjacent the assistant layer and;
- and
- a bottom cladding layer comprising a material having an index of refraction, n4, and wherein the lower core layer is positioned adjacent the bottom cladding layer
- wherein n1 is less than n2, and n4 is less n2, and
- wherein the waveguide is configured to receive light from the light source and direct it out into the NFT-HS.
Dependencies are inferred from the claim text.