Phase-coherent in-line VCSEL array with slider trailing mount for HAMR

A magnetic recording head assembly, comprising:

• a slider, comprising:
• a media facing surface;
• a top surface opposite the media facing surface;
• a trailing edge surface adjacent to the top surface;
• a leading edge surface opposite the trailing edge surface;
• an optical grating disposed on the trailing edge surface;
• and
• a heat sink stud disposed adjacent to the optical grating;
• a vertical cavity surface emitting laser (VCSEL) device coupled to the trailing edge surface of the slider, wherein the VCSEL device is capable of emitting a plurality of lasers that are phase coherent;
• and
• a magnetic recording head disposed on the trailing edge surface of the slider, the magnetic recording head comprising a waveguide and a near field transducer (NFT) coupled to the waveguide.

A magnetic recording head assembly, comprising:

• a slider, comprising:
• a media facing surface;
• a top surface opposite the media facing surface;
• a trailing edge surface adjacent to the top surface;
• a leading edge surface opposite the trailing edge surface;
• an optical grating disposed on the trailing edge surface;
• and
• a heat sink stud disposed adjacent to the optical grating;
• a vertical cavity surface emitting laser (VCSEL) device coupled to the trailing edge surface of the slider, the VCSEL device comprising:
• a first contact pad disposed on a front surface of the VCSEL device, the front surface facing the trailing edge surface of the slider;
• and
• a VCSEL array disposed adjacent to the first contact pad, the VCSEL array comprising a plurality of laser apertures, wherein the VCSEL device is capable of emitting a plurality of lasers that are phase coherent through the plurality of laser apertures;
• and
• a magnetic recording head disposed on the trailing edge surface of the slider, the magnetic recording head comprising a waveguide and a near field transducer (NFT) coupled to the waveguide.