The Provost, Fellows, Foundation Scholars, and the Other Members of Board, of the College of the Holy and Undivided Trinity of Queen Elizabeth Near Dublin

Western Digital Technologies, Inc.

Western Digital (fremont), Inc.

David Michael Owen McCloskey

Alexander Krichevsky

Christopher B Wolf

Frank D Bello

John Donegan

Kyle Ballantine

A heat-assisted magnetic recording (HAMR) write apparatus is coupled with a laser that provides energy. The HAMR write apparatus includes a pole, at least one coil, a waveguide, a near-field transducer (NFT) and at least one antireflective mechanism. The pole writes to a region of the media and includes a media-facing surface. The coil(s) energize the pole. The waveguide is optically coupled with the laser and includes a core and cladding. The waveguide is for directing a portion of the energy toward the NFT, which is located in a transmission direction from the core of the waveguide. The antireflective mechanism(s) are in at least one of a first position in the waveguide, a second position in the NFT and a third position between the waveguide and the NFT.

Method and system for reducing undesirable reflections in a HAMR write apparatus

A focusing structure including an array of localized optical alterations that alter the propagation of light through the waveguide to diffractively focus the light as it exits the focusing structure. The array of optical alterations may be formed along either a straight or a curved line within a cross section of the focusing structure. In energy assisted magnetic recording apparatus a laser beam propagates through the waveguide to a near field transducer. The waveguide comprises a focusing element that includes an array of localized optical alterations that alter the propagation of the laser beam through the waveguide to diffractively focus the laser beam approximately at the near field transducer.

System and method of diffractive focusing of light in a waveguide

Growing community of inventors

Dublin, Ireland

David Michael Owen McCloskey