Patents by Inventor ?sa Claesson

?sa Claesson 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).

  • Method and device for controlling the refractive index in an optical fiber
    Patent number: 6973247
    Abstract: The invention relates to a method and a device for controlling the refractive index in the core of an optical fiber. According to the invention, an optical fiber is provided with a longitudinal electrode running along the core of the fiber. An electric current is passed through the electrode to induce ohmic heating thereof, causing thermal expansion and consequently a compressing force upon the core of the fiber. This compression of the core leads to induced changes in the refractive index in the direction of the compressing force, and hence induces or alters birefringence in the core.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: December 6, 2005
    Assignee: Acreo AB
    Inventors: Michael Fokine, Lars-Erik Nilsson, Åsa Claesson, Walter Margulis, Leif Kjellberg, Hania Arsalane, Pedro Torres