Patents by Inventor Andrea L. Caprara

Andrea L. Caprara 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).

  • Single longitudinal mode laser without seeding
    Patent number: 5412673
    Abstract: The use of feedback circuit in a laser device with a frequency selective element such as an etalon allows for the production of a substantially single longitudinal mode output indefinitely. The feedback circuitry is adapted to adjust the length of the laser cavity so that a longitudinal mode of the laser device is near transmission peak of the frequency selective element.
    Type: Grant
    Filed: December 22, 1993
    Date of Patent: May 2, 1995
    Assignee: Hoya Corporation
    Inventors: Andrea L. Caprara, Jean-Marc Heritier
  • Q-switched solid state pulsed laser with injection seeding and a gaussian output coupling mirror
    Patent number: 4918704
    Abstract: A Q-switched pulsed laser resonant cavity having an output coupling mirror with a radially variable reflectivity function across its surface and a magnification level that combine to provide a very high discrimination against transverse modes of oscillation higher than a desired fundamental mode. This resonant cavity is especially adapted for use with injection seeding to limit the longitudinal modes of oscillation to one mode. The cavity arrangement develops a high powered light pulsed beam at its output that also has a uniform intensity profile.
    Type: Grant
    Filed: January 10, 1989
    Date of Patent: April 17, 1990
    Assignee: Quantel International, Inc.
    Inventors: Andrea L. Caprara, Jean-Marc Heritier