Patents by Inventor Katrin Ekvall

Katrin Ekvall 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 frequency mixing
    Patent number: 7362783
    Abstract: A method of generating coherent radiation, wherein a first fundamental beam of radiation from a four level laser and a second fundamental beam of radiation from a three level laser are mixed in a non-linear body to obtain an output beam at the sum frequency of the two fundamental beams. The invention also relates to an arrangement for carrying out the method.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: April 22, 2008
    Assignee: Cobolt AB
    Inventors: Stefan Spiekermann, Katrin Ekvall, Håkan Karlsson
  • Coherent light source based on sum-frequency mixing
    Patent number: 7269189
    Abstract: A method and a device for generating visible coherent radiation is disclosed. The visible coherent radiation is generated by sum-frequency mixing of a first fundamental beam from a diode laser and a second fundamental beam from a diode-pumped solid-state laser. The mixing is performed by means of a quasi-phasematching element provided within the resonant cavity of the solid-state laser. The first fundamental beam is stabilized by providing feedback to the diode laser.
    Type: Grant
    Filed: January 21, 2005
    Date of Patent: September 11, 2007
    Assignee: Cobolt AB
    Inventors: Sandra Johansson, Stefan Spiekermann, Shunhua Wang, Valdas Pasiskevicius, Fredrik Laurell, Håkan Karlsson, Katrin Ekvall
  • Coherent light source based on sum-frequency mixing
    Publication number: 20060165136
    Abstract: A method and a device for generating visible coherent radiation is disclosed. The visible coherent radiation is generated by sum-frequency mixing of a first fundamental beam from a diode laser and a second fundamental beam from a diode-pumped solid-state laser. The mixing is performed by means of a quasi-phasematching element provided within the resonant cavity of the solid-state laser. The first fundamental beam is stabilized by providing feedback to the diode laser.
    Type: Application
    Filed: January 21, 2005
    Publication date: July 27, 2006
    Applicant: COBOLT AB
    Inventors: Sandra Johansson, Stefan Spiekermann, Shunhua Wang, Valdas Pasiskevicius, Fredrik Laurell, Hakan Karlsson, Katrin Ekvall
  • Optical frequency mixing
    Publication number: 20040125834
    Abstract: A method of generating coherent radiation wherein a first fundamental beam of radiation from a four level laser and a second fundamental beam of radiation from a three level laser are mixed in a non-linear body, to obtain an output beam at the sum frequency of the two fundamental beams. The invention also relates to an arrangement for carrying out the method.
    Type: Application
    Filed: February 6, 2004
    Publication date: July 1, 2004
    Inventors: Stefan Spierkermann, Katrin Ekvall, Hakan Karlsson