Patents by Inventor Leif Johansson

Leif Johansson 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: 20250244535
    Abstract: Photonic coupling mechanisms are described. In one example, an evanescent coupler includes a substrate, first and second optical waveguides formed on the substrate, and a photonic wirebond having first and second end regions coupled to the first and second optical waveguides, respectively and a loopback portion extending between the first and second end regions, the photonic wirebond extending away from the first optical waveguide by an extension length.
    Type: Application
    Filed: January 30, 2024
    Publication date: July 31, 2025
    Inventors: Thien An Nguyen, Zakary N. Burkley, Mackenzie A. Van Camp, Charles J. Turner, John Jost, Leif Johansson
  • Publication number: 20250246871
    Abstract: Photonic coupling mechanisms are described. In one example, a reference cavity system includes a housing, a photonic integrated circuit disposed within the housing, the photonic integrated circuit including an optical waveguide network, the optical waveguide network including at least a first optical waveguide and a second optical waveguide, and a crystalline microresonator disposed within the housing. Examples of the reference cavity system further include a photonic wirebond having first and second end regions coupled to the first and second optical waveguides, respectively, and a loopback portion extending between the first and second end regions, the photonic wirebond extending away from the photonic integrated circuit toward the crystalline microresonator and configured to couple light between the optical waveguide network and the crystalline microresonator via evanescent coupling.
    Type: Application
    Filed: January 30, 2024
    Publication date: July 31, 2025
    Inventors: Zakary N. Burkley, Mackenzie A. Van Camp, Charles J. Turner, Craig C. Price, John Jost, Thien An Nguyen, Leif Johansson
  • Publication number: 20250244635
    Abstract: Photonic coupling mechanisms and techniques are described. In one example, a method includes writing a photonic wirebond to at least one optical waveguide to position the photonic wirebond at a first coupling position relative to a crystalline microresonator, injecting optical power into the at least one optical waveguide, determining a number of generated light modes within the crystalline microresonator, and performing a peak search to locate at least one soliton step corresponding to at least one of the generated light modes within the crystalline microresonator.
    Type: Application
    Filed: January 30, 2024
    Publication date: July 31, 2025
    Inventors: Zakary N. Burkley, Craig C. Price, Mackenzie A. Van Camp, John Jost, Thien An Nguyen, Leif Johansson
  • Patent number: 12081357
    Abstract: A method is implemented by a computing device for atomic multicast support for a multicast group, includes receiving a message order from a sequencer via remote write, the message order defining a sequence for a plurality of messages from a multicast group, receiving the plurality of messages from at least one sender in the multicast group via remote write, and providing the plurality of messages to an application in the message order, in response to determining that all of the plurality of messages have been received.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: September 3, 2024
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Per Holmberg, Leif Johansson
  • Patent number: 11641288
    Abstract: A method implemented by an electronic device for sending data on low latency communication includes remote writing a sequence number of a message to be sent next to a receiver, determining whether there is an open position in a receive buffer of the receiver using a local tracking mechanism, writing data of the message to an area of an address space of a sending application that is mapped onto the receive buffer as a result of determining there is the open position in the receive buffer, incrementing a local sequence counter, and updating position information in the local tracking mechanism.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: May 2, 2023
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Leif Johansson, Per Holmberg
  • Patent number: 11615023
    Abstract: A processing system has at least one internal processing unit and associated memory. The memory is accessible by at least two other independent processing units, and the memory of the at least one internal processing unit includes a data structure shared by the at least two other independent processing units that are allowed to perform direct memory writes into the shared data structure. A dedicated set of one or more bits in the shared data structure is allocated to each one of the at least two other independent processing units, each bit or each group of bits in the shared data structure indicates a unique combination of independent processing unit and application handler for handling an application in relation to the corresponding independent processing unit. Preparation and/or activation of the application handler indicated by the set bit or the set group of bits is initiated.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: March 28, 2023
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Per Holmberg, Leif Johansson
  • Publication number: 20220417055
    Abstract: A method implemented by an electronic device for sending data on low latency communication includes remote writing a sequence number of a message to be sent next to a receiver, determining whether there is an open position in a receive buffer of the receiver using a local tracking mechanism, writing data of the message to an area of an address space of a sending application that is mapped onto the receive buffer as a result of determining there is the open position in the receive buffer, incrementing a local sequence counter, and updating position information in the local tracking mechanism.
    Type: Application
    Filed: September 19, 2019
    Publication date: December 29, 2022
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Leif JOHANSSON, Per HOLMBERG
  • Publication number: 20220360465
    Abstract: A method is implemented by a computing device for atomic multicast support for a multicast group, includes receiving a message order from a sequencer via remote write, the message order defining a sequence for a plurality of messages from a multicast group, receiving the plurality of messages from at least one sender in the multicast group via remote write, and providing the plurality of messages to an application in the message order, in response to determining that all of the plurality of messages have been received.
    Type: Application
    Filed: September 19, 2019
    Publication date: November 10, 2022
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Per HOLMBERG, Leif JOHANSSON
  • Publication number: 20220268041
    Abstract: An adjustment system including an adjustable support, a driving arrangement, a locking arrangement and a motor. The adjustable support includes a base including a bore having an open mouth; a screw being movable received in the bore while having a free end configured to project past the open mouth of the bore; and a driver being arranged in driving engagement with the screw, whereby a rotation of the driver results in a linear movement of the screw along the longitudinal extension of the bore. The driving arrangement includes a driver actuator arranged to be driven by the motor. Further, a method of orienting an element relative to a reference plane is provided.
    Type: Application
    Filed: August 11, 2020
    Publication date: August 25, 2022
    Applicant: I & P i NORR AB
    Inventors: Leif JOHANSSON, Anders HELIN
  • Patent number: 11317469
    Abstract: There is provided a radio access network node (200) for a wireless communication system, wherein the radio access network node (200) is configured to be implemented as a clustered system comprising a cluster of interconnected network node sub-modules (210). Each network node sub-module (210) comprises a processing unit (212) and memory (214), and the memory (214) comprises a data structure. At least one of the network node sub-modules (210) is configured to manage at least one radio and/or antenna unit (220). The radio access network node (200) also has a communication mechanism for communication between the network node sub-modules (210), and the communication mechanism is configured to enable a direct memory write operation from at least one network node sub-module into the data structure of at least one other network node sub-module.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: April 26, 2022
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Per Holmberg, Leif Johansson
  • Publication number: 20220107895
    Abstract: A processing system has at least one internal processing unit and associated memory. The memory is accessible by at least two other independent processing units, and the memory of the at least one internal processing unit includes a data structure shared by the at least two other independent processing units that are allowed to perform direct memory writes into the shared data structure. A dedicated set of one or more bits in the shared data structure is allocated to each one of the at least two other independent processing units, each bit or each group of bits in the shared data structure indicates a unique combination of independent processing unit and application handler for handling an application in relation to the corresponding independent processing unit. Preparation and/or activation of the application handler indicated by the set bit or the set group of bits is initiated.
    Type: Application
    Filed: September 17, 2018
    Publication date: April 7, 2022
    Inventors: Per HOLMBERG, Leif JOHANSSON
  • Publication number: 20200329530
    Abstract: There is provided a radio access network node (200) for a wireless communication system, wherein the radio access network node (200) is configured to be implemented as a clustered system comprising a cluster of interconnected network node sub-modules (210). Each network node sub-module (210) comprises a processing unit (212) and memory (214), and the memory (214) comprises a data structure. At least one of the network node sub-modules (210) is configured to manage at least one radio and/or antenna unit (220). The radio access network node (200) also has a communication mechanism for communication between the network node sub-modules (210), and the communication mechanism is configured to enable a direct memory write operation from at least one network node sub-module into the data structure of at least one other network node sub-module.
    Type: Application
    Filed: November 28, 2017
    Publication date: October 15, 2020
    Inventors: Per Holmberg, Leif Johansson
  • Patent number: 10355451
    Abstract: A laser comprising a laser cavity formed by a broadband mirror and a comb mirror having a plurality of reflection peaks. A spacing between the plurality of reflection peaks is adjusted such that only one reflection peak is in a gain bandwidth of the laser.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: July 16, 2019
    Assignee: FREEDOM PHOTONICS LLC
    Inventors: Gordon Barbour Morrison, Leif Johansson, Milan L. Mashanovitch
  • Publication number: 20180287343
    Abstract: A laser comprising a laser cavity formed by a broadband mirror and a comb mirror having a plurality of reflection peaks. A spacing between the plurality of reflection peaks is adjusted such that only one reflection peak is in a gain bandwidth of the laser.
    Type: Application
    Filed: April 25, 2018
    Publication date: October 4, 2018
    Inventors: Gordon Barbour Morrison, Leif Johansson, Milan L. Mashanovitch
  • Patent number: 9941971
    Abstract: A monolithic integrated optical transmitter comprising (a) an optical source including two output optical paths and (b) a modulator section that includes an interferometric optical signal combiner is described. Each of the two output optical paths of the optical source includes a reflector. The optical source is configured to output a first light beam through the first optical path and a second light beam through the second optical path. The optical transmitter is capable of generating advanced modulation format signals based on amplitude and phase modulation.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: April 10, 2018
    Assignee: Freedom Photonics, LLC.
    Inventors: Milan Mashanovitch, Leif Johansson
  • Patent number: 9887780
    Abstract: In various embodiments, a monolithic integrated transmitter, comprising an on-chip laser source and a modulator structure capable of generating advanced modulation format signals based on amplitude and phase modulation are described.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: February 6, 2018
    Assignee: Freedom Photonics, LLC.
    Inventors: Jonathon Barton, Leif Johansson, Milan Mashanovitch
  • Publication number: 20160344480
    Abstract: In various embodiments, a monolithic integrated transmitter, comprising an on-chip laser source and a modulator structure capable of generating advanced modulation format signals based on amplitude and phase modulation are described.
    Type: Application
    Filed: February 18, 2016
    Publication date: November 24, 2016
    Inventors: Jonathon Barton, Leif Johansson, Milan Mashanovitch
  • Patent number: 9344196
    Abstract: A monolithic integrated optical transmitter comprising (a) an optical source including two output optical paths and (b) a modulator section that includes an interferometric optical signal combiner is described. Each of the two output optical paths of the optical source includes a reflector. The optical source is configured to output a first light beam through the first optical path and a second light beam through the second optical path. The optical transmitter is capable of generating advanced modulation format signals based on amplitude and phase modulation.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: May 17, 2016
    Assignee: Freedom Photonics, LLC.
    Inventors: Milan L. Mashanovitch, Leif Johansson
  • Patent number: 9270380
    Abstract: In various embodiments, a monolithic integrated transmitter, comprising an on-chip laser source and a modulator structure capable of generating advanced modulation format signals based on amplitude and phase modulation are described.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: February 23, 2016
    Assignee: FREEDOM PHOTONICS, LLC.
    Inventors: Jonathon Barton, Leif Johansson, Milan Mashanovitch
  • Patent number: 9048652
    Abstract: A cable termination device of the dry type, including an insulator housing with an upper end and a lower end and having a hollow interior, which lower end has an opening for insertion of the cable. The device further includes a stress controller device located inside the insulator housing and adapted to be mounted on a high voltage cable, and an electrically insulating gel filling at least part of the hollow interior of the insulator housing and surrounding at least part of the stress controller device. Further, the stress controller device extends from the lower end of the insulator housing and into the housing where it has a free end, whereby a space is formed between the stress controller device and an inner wall of the insulator housing.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: June 2, 2015
    Assignee: ABB TECHNOLOGY AG
    Inventors: Mikael Hoglund, Leif Johansson