US 12,087,338 B1
HAMR read-write head with coupler and waveguide
Christopher Neil Harvey, Londonderry (GB); Aidan Dominic Goggin, Donegal (IE); and Chuan Zhong, Londonderry (GB)
Assigned to Seagate Technology LLC, Fremont, CA (US)
Filed by Seagate Technology LLC, Fremont, CA (US)
Filed on Jun. 28, 2022, as Appl. No. 17/851,159.
Claims priority of provisional application 63/215,955, filed on Jun. 28, 2021.
Int. Cl. G11B 11/105 (2006.01); G11B 5/39 (2006.01); G11B 5/48 (2006.01); G11B 5/60 (2006.01); G11B 5/73 (2006.01); G11B 20/10 (2006.01)
CPC G11B 5/7375 (2019.05) [G11B 5/3967 (2013.01); G11B 5/4866 (2013.01); G11B 5/6052 (2013.01)] 20 Claims
OG exemplary drawing
 
1. 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.