Patents by Inventor Alexander Krichevsky

Alexander Krichevsky has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210132306
    Abstract: An optical system can include a optical receiver comprising an optical waveguide, an optical lid adjacent the waveguide, and a reflective surface proximate an output of the optical waveguide to direct light from the waveguide towards an output of the optical lid. The optical system can also include a photodetector (PD) die comprising a substrate, a concave mirror, and a photodetector. The concave mirror is formed on a first side of the substrate and the photodetector is disposed on a second side of the substrate, the first side opposite the second side, wherein the photodetector is disposed on the second side of the PD die offset from the optical axis of the optical element.
    Type: Application
    Filed: December 11, 2020
    Publication date: May 6, 2021
    Applicant: Intel Corporation
    Inventors: Alexander Krichevsky, John M. Heck
  • Publication number: 20210058159
    Abstract: Embodiments of the present disclosure are directed to an optical transceiver within a single device. The optical transceiver incorporates an optical isolator, thus eliminating the need for an external isolator unit. In embodiments, transmitter channels and receiver channels share a single lens array and incorporate a compensator block to equalize the transmitter and receiver optical signals in the transceiver. Other embodiments may be described and/or claimed.
    Type: Application
    Filed: October 20, 2020
    Publication date: February 25, 2021
    Inventors: Alexander Krichevsky, Boping Xie
  • Patent number: 10852491
    Abstract: There is disclosed in one example a computing apparatus, including: a fiber-optic transmitter including a laser source; an input waveguide to receive a modulated laser pulse from the laser source; an output waveguide to direct the modulated laser pulse to an external communication element; and an isolator bridge optically coupled to the input waveguide and output waveguide, the isolator bridge including an input lens, an input-side folding prism, an isolator element, an output-side folding prism, and an output lens, wherein an input light pulse through the input lens is to be redirected by the input-side folding prism through the isolator element to the output-side folding prism, and redirected by the output-side folding prism through the output lens.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: December 1, 2020
    Assignee: Intel Corporation
    Inventor: Alexander Krichevsky
  • Patent number: 10360939
    Abstract: Disclosed herein are embodiments of a heat-assisted magnetic recording (HAMR) device comprising a waveguide and a near-field transducer (NFT) coupled to the waveguide. The NFT comprises a core layer comprising an insulator, a first metal layer adjacent to the core layer, and a second layer adjacent to the first metal layer, wherein the second layer comprises a material that is substantially mechanically and thermally stable and thereby functions as a hard jacket to mitigate deformation of the NFT. The first metal layer may comprise a plasmonic metal, such as gold. The second layer may comprise tungsten, chromium, or a dielectric material.
    Type: Grant
    Filed: December 23, 2017
    Date of Patent: July 23, 2019
    Assignees: Western Digital Technologies, Inc., The Provost, Fellows, Scholars and other Members of Board of Trinity College Dublin
    Inventors: Alexander Krichevsky, Frank Bello, Christopher Wolf, Fenghua Zong, Daniel Wolf, David McCloskey, Kyle Ballantine, John Donegan
  • Publication number: 20190198053
    Abstract: Disclosed herein are embodiments of a heat-assisted magnetic recording (HAMR) device comprising a waveguide and a near-field transducer (NFT) coupled to the waveguide. The NFT comprises a core layer comprising an insulator, a first metal layer adjacent to the core layer, and a second layer adjacent to the first metal layer, wherein the second layer comprises a material that is substantially mechanically and thermally stable and thereby functions as a hard jacket to mitigate deformation of the NFT. The first metal layer may comprise a plasmonic metal, such as gold. The second layer may comprise tungsten, chromium, or a dielectric material.
    Type: Application
    Filed: December 23, 2017
    Publication date: June 27, 2019
    Applicants: Western Digital Technologies, Inc., The Provost, Fellows, Foundation Scholars and the other members of the Board, of the College of the
    Inventors: Alexander KRICHEVSKY, Frank BELLO, Christopher WOLF, Fenghua ZONG, Daniel WOLF, David MCCLOSKEY, Kyle BALLANTINE, John DONEGAN
  • Publication number: 20190146164
    Abstract: There is disclosed in one example a computing apparatus, including: a fiber-optic transmitter including a laser source; an input waveguide to receive a modulated laser pulse from the laser source; an output waveguide to direct the modulated laser pulse to an external communication element; and an isolator bridge optically coupled to the input waveguide and output waveguide, the isolator bridge including an input lens, an input-side folding prism, an isolator element, an output-side folding prism, and an output lens, wherein an input light pulse through the input lens is to be redirected by the input-side folding prism through the isolator element to the output-side folding prism, and redirected by the output-side folding prism through the output lens.
    Type: Application
    Filed: December 20, 2018
    Publication date: May 16, 2019
    Applicant: Intel Corporation
    Inventor: Alexander Krichevsky
  • Publication number: 20190123109
    Abstract: Optical receiver packages and device assemblies that include photodetector (PD) chips having focus lenses monolithically integrated on PD die backsides are disclosed. An example receiver package includes a support structure, a PD die, and an optical input device. The PD die includes a PD, integrated proximate to a first face of the PD die, and further includes a lens, integrated on, or proximate to, an opposite second face. The first face of the PD die faces the support structure, while the second face (“backside”) faces the optical input device. The optical receiver architectures described herein may provide an improvement for the optical alignment tolerance issues, especially for high-speed operation in which the active aperture of the PD may have to be very small. Furthermore, architectures described herein advantageously enable integrating a focus lens in a PD die that may be coupled to the support structure in a flip-chip arrangement.
    Type: Application
    Filed: December 19, 2018
    Publication date: April 25, 2019
    Applicant: Intel Corporation
    Inventors: Boping Xie, Ansheng Liu, Olufemi Isiade Dosunmu, Alexander Krichevsky, Kelly Christopher Magruder, Harel Frish
  • Patent number: 10249336
    Abstract: Disclosed herein are embodiments of a heat-assisted magnetic recording (HAMR) device comprising a waveguide and a near-field transducer (NFT) coupled to the waveguide in a direct-fire configuration. The NFT comprises an insulator core encased in a metal portion. The insulator core comprises a rectangular portion and a tapered portion, wherein the rectangular portion is between the waveguide and the tapered portion. The metal portion comprises a plasmonic metal.
    Type: Grant
    Filed: December 23, 2017
    Date of Patent: April 2, 2019
    Assignees: Western Digital Technologies, Inc., The Provost, Fellows, Scholars and other Members of Board of Trinity College Dublin
    Inventors: Alexander Krichevsky, Frank Bello, Christopher Wolf, Fenghua Zong, Daniel Wolf, David McCloskey, Kyle Ballantine, John Donegan
  • Patent number: 9944907
    Abstract: The present disclosure relates to mutated genes of the LUX operon and their use in producing autoluminescent plants and bacteria exhibiting improved light output.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: April 17, 2018
    Assignee: BioGlow LLC
    Inventor: Alexander Krichevsky
  • Publication number: 20170335294
    Abstract: Present invention discloses plants and plant cells comprising Streptomyces thermoautotrophicus nitrogenase and capable able of nitrogen fixation. Methods to generate said plants and plant cells are disclosed. This invention is instrumental for producing plants, including agriculturally important crops, with reduced or abolished requirements for nitrogen fertilizer.
    Type: Application
    Filed: May 4, 2015
    Publication date: November 23, 2017
    Inventor: Alexander KRICHEVSKY
  • Publication number: 20170044505
    Abstract: The present disclosure relates to mutated genes of the LUX operon and their use in producing autoluminescent plants and bacteria exhibiting improved light output.
    Type: Application
    Filed: April 15, 2015
    Publication date: February 16, 2017
    Inventor: Alexander Krichevsky
  • Patent number: 9506075
    Abstract: In one aspect, the invention relates to a transgenic bioluminescent plant including an expressible heterologous nucleotide sequence comprising a bacterial LUX operon, which includes LUX A, LUX B, LUX C, LUX D, LUX E, and LUX G genes, wherein the heterologous nucleotide sequence is expressed to render the plant bioluminescent.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: November 29, 2016
    Assignee: BioGlow, LLC
    Inventor: Alexander Krichevsky
  • Patent number: 9484051
    Abstract: 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.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: November 1, 2016
    Assignees: 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.
    Inventors: Alexander Krichevsky, Christopher B. Wolf, Frank D. Bello, Kyle E. Ballantine, John Donegan, David Michael Owen McCloskey
  • Patent number: 9284569
    Abstract: Real-time monitoring of plant or environmental conditions is solved by Autoluminescent Phytosensor Plants (ALPS) disclosed herein that emit light in response to a specified stimulus or condition, which light emission is detected or measured by a sensor.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: March 15, 2016
    Assignee: Bioglow, LLC
    Inventor: Alexander Krichevsky
  • Patent number: 9111558
    Abstract: 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.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: August 18, 2015
    Assignees: Western Digital (Fremont), LLC, 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
    Inventors: Alexander Krichevsky, David Michael Owen McCloskey, Frank D. Bello, Christopher B. Wolf
  • Patent number: 9099103
    Abstract: A method, system and apparatus are described for increasing areal density and track density for a data storage system. Media with high magneto-crystalline anisotropy is heated locally during writing, utilizing heating methods such as heat-assisted magnetic recording, energy assisted magnetic recording, thermally assisted recording. In an aspect, high-power heated tracks of a magnetic recording layer are heated and written, and then low-power heated tracks are heated and written. The high-power heated tracks and the low-power heated tracks are interlaced, such that a low-power heated track is situated between two high-power heated tracks. In an aspect, media rewriting speed is increased. In an aspect, the high-power heated tracks and low-power heated tracks are written to at substantially the same data rate and linear density. In an aspect, any erasure of any portion of the high-power heated tracks from heating the low-power heated tracks is avoided, or minimized.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: August 4, 2015
    Assignee: Western Digital Technologies, Inc.
    Inventor: Alexander Krichevsky
  • Patent number: 9074941
    Abstract: Systems and methods for measuring ambient and laser temperature in heat assisted magnetic recording (HAMR) systems are provided. One such system includes a slider having a write head, a laser diode coupled to the slider and configured to direct energy to a magnetic medium, and a preamplifier circuit including a voltage measurement circuit configured to measure a voltage drop across the laser diode, and a current measurement circuit configured to measure a current through the laser diode, where the preamplifier circuit is configured to store calibration information including a plurality of temperatures corresponding with measurements of the voltage drop across the laser diode and measurements of the current through the laser diode, and calculate a temperature based on the measured voltage drop across the laser diode, the measured current through the laser diode, and the calibration information.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: July 7, 2015
    Assignee: Western Digital Technologies, Inc.
    Inventors: Alexander Krichevsky, Robert J. Johnson
  • Patent number: 9064528
    Abstract: A heat-assisted magnetic recording (HAMR) head is coupled with a laser for providing energy and has an air-bearing surface (ABS) configured to reside in proximity to a media during use. The HAMR head includes a slider coupled with the laser and a HAMR transducer coupled with the slider. The HAMR transducer includes a write pole that writes to a region of the media, coil(s) for energizing the write pole and an interferometric waveguide (IWG) optically coupled with the laser. The IWG includes a splitter, a recombination region and arms between the splitter and the recombination region. The arms have multiple optical path lengths. The IWG is configured to provide the energy from the laser to the media by forming an interference pattern in the recombination region. An antinode of the interference pattern is at a region of the media and heats the region of the media for a write operation.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: June 23, 2015
    Assignee: Western Digital Technologies, Inc.
    Inventors: Alexander Krichevsky, Christopher B. Wolf
  • Patent number: 9064525
    Abstract: A disk drive is disclosed comprising a disk and a head comprising a laser configured to heat the disk while writing to the disk. At least one transmission line couples a laser driver to the laser. Data is written to the disk by pulsing the laser driver, wherein the transmission line comprises an impedance that results in a target pulse shape of optical power output by the laser.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: June 23, 2015
    Assignee: Western Digital Technologies, Inc.
    Inventors: Alexander Krichevsky, Robert J. Johnson
  • Publication number: 20150146506
    Abstract: A disk drive is disclosed comprising a disk and a head comprising a laser configured to heat the disk while writing to the disk. At least one transmission line couples a laser driver to the laser. Data is written to the disk by pulsing the laser driver, wherein the transmission line comprises an impedance that results in a target pulse shape of optical power output by the laser.
    Type: Application
    Filed: November 26, 2013
    Publication date: May 28, 2015
    Applicant: Western Digital Technologies, Inc.
    Inventors: ALEXANDER KRICHEVSKY, ROBERT J. JOHNSON