公开(公告)号：US09917713B2

公开(公告)日：2018-03-13

申请号：US15139779

申请日：2016-04-27

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Kunzhi Yu ,  Cheng Li ,  Marco Fiorentino ,  Raymond G. Beausoleil

IPC: H03D1/00 ,  H04L27/22 ,  H04L27/233 ,  H04L25/06

CPC classification number: H04L27/223 ,  H04L7/033 ,  H04L25/066 ,  H04L25/069 ,  H04L27/2338

Abstract: In one example, an apparatus includes an offset tunable edge slicer having an input to receive a pulse amplitude modulation signal. The offset tunable edge slicer also has a plurality of possible offset settings corresponding to a plurality of different reference voltages of the offset tunable edge slicer. A multiplexer has an output coupled to the input of the offset tunable edge slicer and an input to receive a control signal that selects one of the plurality of possible offset settings for the offset tunable edge slicer. A phase detector has an input coupled to an output of the offset tunable edge slicer.

公开(公告)号：US09755395B2

公开(公告)日：2017-09-05

申请号：US15107932

申请日：2014-01-24

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Di Liang ,  Raymond G. Beausoleil

IPC: H01S3/14 ,  H01S3/083 ,  H01S3/063 ,  H01S3/13 ,  H01S3/23 ,  H01S3/00 ,  H01S3/10 ,  H01S3/082 ,  H01S3/137

CPC classification number: H01S3/083 ,  H01S3/005 ,  H01S3/0637 ,  H01S3/082 ,  H01S3/10053 ,  H01S3/1305 ,  H01S3/1307 ,  H01S3/137 ,  H01S3/2391

Abstract: An optical system includes an output waveguide to propagate an optical output signal and a plurality of ring laser systems. Each of the plurality of ring laser systems includes a ring laser to generate a ring laser optical signal and a local waveguide. The ring laser can be optically coupled to the output waveguide to provide a first portion of the ring laser optical signal on the output waveguide as part of the optical output signal, and can be optically coupled to the local waveguide to provide a second portion of the ring laser optical signal on the local waveguide. Each of the plurality of ring laser systems can be to control a phase of the second portion of the ring laser optical signal to provide constructive interference with the ring laser optical signal at an optical coupling of the ring laser and the local waveguide.

公开(公告)号：US20170093128A1

公开(公告)日：2017-03-30

申请号：US15191741

申请日：2016-06-24

Applicant: Hewlett Packard Enterprise Development LP

Inventor： David A. Fattal ,  Michael Renne Ty Tan ,  Raymond G. Beausoleil

IPC: H01S5/183 ,  H01S5/42 ,  H01S5/187

CPC classification number: H01S5/18363 ,  H01S5/0421 ,  H01S5/18308 ,  H01S5/18355 ,  H01S5/18358 ,  H01S5/1838 ,  H01S5/18386 ,  H01S5/34313 ,  H01S5/4087 ,  H01S5/423

Abstract: Vertical-cavity surface-emitting lasers (“VCSELs”) and VCSEL arrays are disclosed. In one aspect, a surface-emitting laser includes a grating layer having a sub-wavelength grating to form a resonant cavity with a reflective layer for a wavelength of light to be emitted from a light-emitting layer and an aperture layer disposed within the resonant cavity. The VCSEL includes a charge carrier transport layer disposed between the grating layer and the light-emitting layer. The transport layer has a gap adjacent to the sub-wavelength grating and a spacer region between the gap and the light-emitting layer. The spacer region and gap are dimensioned to be substantially transparent to the wavelength. The aperture layer directs charge carriers to enter a region of the light-emitting layer adjacent to an aperture in the aperture layer and the aperture confines optical modes to be emitted from the light-emitting layer.