(57) ABSTRACT A 400 Gb/s transmitter is integrated on a silicon substrate. The transmitter
uses four gain chips, sixteen lasers, four modulators to modulate the sixteen lasers at 25 …

Aspects of the invention are directed to a method for forming an optical waveguide structure.
Initially, a base film stack is received with an optical waveguide feature covered by a lower …

An apparatus comprises a slider configured for heat-assisted magnetic recording. A near-
field transducer comprising a peg is situated at or near an air bearing surface of the slider …

A semiconductor laser has a mirror formed in a gain chip. The mirror can be placed in the
gain chip to provide a broadband reflector to support multiple lasers using the gain chip. The …

(57) ABSTRACT A photonic device includes a semiconductor wafer having a waveguide
formed therein. An end of the waveguide includes a step. The photonic device further …

A gradient-index lens couples light from a laser active region to a waveguide core. The
gradient-index lens includes a plurality of bilayers, each of the bilayers having first and …

Provided is a structure of a heat assisted magnetic recording head gimbal assembly that
allows common inexpensive TE mode LDs to be utilized. The heat assisted magnetic record …

An apparatus includes an input coupler configured to receive light excited by a light source.
A near-field transducer (NFT) is positioned at a media-facing surface of a write head. A …

An apparatus includes an input coupler configured to receive light excited by a light source.
A near-field transducer (NFT) is positioned at a media-facing surface of a write head. A …

A recording head includes a substrate, a read transducer, a waveguide core, and a near-
field transducer at an end of the waveguide core proximate a media-facing surface. The …