Patent ID: 11908499
Assignee: SEAGATE TECHNOLOGY LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 15:
16. A heat-assisted magnetic recording head comprising:
a laser configured to emit electromagnetic radiation;
a near-field transducer configured to focus and emit an optical near-field;
a photodiode configured to receive a portion of the electromagnetic radiation;
a primary waveguide comprising:
a first segment adjacent to the laser and coupled to a coupler that is configured to direct the electromagnetic radiation emitted by the laser into the primary waveguide;
a second segment adjacent to the near-field transducer; and
a third segment disposed between the first end and the second end of the primary waveguide; and

a secondary waveguide comprising:
a first segment adjacent to the photodiode;
a second segment that is at an opposite end of the secondary waveguide from the first segment; and

a third segment disposed between the first end and the second end of the primary waveguide,
wherein the third segment of the primary waveguide and the third segment of the secondary waveguide are adjacent and substantially parallel to each other and are separated by a gap.