US 11,817,119 B2
Laser feedback suppressor for heat-assisted magnetic recording
Aidan Dominic Goggin, Donegal (IE); John Moloney, Castleconnell (IE); Reyad Mehfuz, Londonderry (GB); Chuan Zhong, Londonderry (GB); and Christopher Neil Harvey, Londonderry (GB)
Assigned to Seagate Technology LLC, Fremont, CA (US)
Filed by Seagate Technology LLC, Fremont, CA (US)
Filed on Dec. 9, 2021, as Appl. No. 17/546,855.
Application 17/546,855 is a continuation of application No. 17/082,360, filed on Oct. 28, 2020, granted, now 11,227,633.
Claims priority of provisional application 62/928,442, filed on Oct. 31, 2019.
Prior Publication US 2022/0101879 A1, Mar. 31, 2022
Int. Cl. G11B 5/105 (2006.01); G11B 5/48 (2006.01); G11B 13/08 (2006.01); G11B 5/60 (2006.01); G11B 5/00 (2006.01); G11B 11/105 (2006.01)
CPC G11B 13/08 (2013.01) [G11B 5/4866 (2013.01); G11B 5/6088 (2013.01); G11B 11/105 (2013.01); G11B 2005/0021 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A recording head, comprising:
a channel waveguide that delivers light to a media-facing surface;
a near-field transducer (NFT) at an end of the channel waveguide and proximate to the media-facing surface; and
a laser comprising an active region having a longitudinal axis corresponding to a propagation direction of the channel waveguide, the active region comprising a back facet and a front facet proximate the NFT, the front facet having a surface shape configured to suppress back reflection of the light, the surface shape of the front facet comprising one or both of a convex shape and a concave shape.