Patents by Inventor Staffan David HELLSTRÖM

Staffan David HELLSTRÖM 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).

  • Optical device and method for controlling such a device
    Patent number: 11081863
    Abstract: An optical device comprises a light input, a light modulating means and a light output. The optical device further comprises an optical amplification device arranged to amplify light travelling between said light modulating means and said output. The optical amplification device comprises first and second serially connected post SOA (Semiconductor Optical Amplifier) units, each comprising at least one respective serially connected post SOA segment, which device is arranged to vary a light amplification by varying respective SOA bias voltages across said post SOA segments. A total SOA length of the first post SOA unit is relatively longer than a total SOA length of the second post SOA unit, which is relatively shorter. The optical device is arranged to, during operation using a particular operation program, always keep respective SOA bias voltages across each of the post SOA segments of the first post SOA unit at +0.5 V or more.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: August 3, 2021
    Assignee: FINISAR SWEDEN AB
    Inventors: Jan-Olof Wesström, Per Granestrand, Martin Anders Isak Stattin, Staffan David Hellström
  • OPTICAL DEVICE AND METHOD FOR CONTROLLING SUCH A DEVICE
    Publication number: 20180309267
    Abstract: An optical device comprises a light input, a light modulating means and a light output. The optical device further comprises an optical amplification device arranged to amplify light travelling between said light modulating means and said output. The optical amplification device comprises first and second serially connected post SOA (Semiconductor Optical Amplifier) units, each comprising at least one respective serially connected post SOA segment, which device is arranged to vary a light amplification by varying respective SOA bias voltages across said post SOA segments. A total SOA length of the first post SOA unit is relatively longer than a total SOA length of the second post SOA unit, which is relatively shorter. The optical device is arranged to, during operation using a particular operation program, always keep respective SOA bias voltages across each of the post SOA segments of the first post SOA unit at +0.5 V or more.
    Type: Application
    Filed: April 13, 2018
    Publication date: October 25, 2018
    Inventors: Jan-Olof Wesström, Per GRANESTRAND, Martin Anders Isak STATTIN, Staffan David HELLSTRÖM