Energy assisted magnetic recording disk drive using a distributed feedback laser

An energy assisted magnetic recording (EAMR) disk drive including a media comprising:

• a slider having a trailing face and an air-bearing surface (ABS);
• at least one distributed feedback (DFB) laser including a plurality of quantum wells, a second order surface coupling grating, a cavity in the at least one DFB laser, a first mirror and at least one reflector, the at least one DFB laser for providing energy to the media, the at least one reflector residing between the ABS and the cavity, the cavity residing between the trailing face and the mirror and having an antireflective coating at a cavity edge;
• and
• at least one EAMR transducer on the slider, the at least one EAMR transducer including at least one waveguide, a write pole, at least one coil for energizing the write pole, a reflecting grating, a near-field transducer, a second mirror, and a surface coupling grating for coupling the energy from the at least one DFB laser to the at least one waveguide, the at least one waveguide for directing the energy from the surface coupling grating toward the ABS and for directing reflected energy from the ABS to the surface coupling grating, the surface coupling grating residing between the ABS and the reflecting grating, the (NFT) for focusing the energy from the at least one waveguide onto the media, the at least one waveguide residing between the second mirror and the cavity.