Patents by Inventor James R. Downes

James R. Downes 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).

  • Semiconductor diode laser and method of manufacturing same
    Patent number: 5956359
    Abstract: The invention relates to a laser with a multi quantum well active layer in which a portion of the quantum well and barrier layers is provided with a compression stress, while another portion is provided with an oppositely directed tensile stress. Said stresses are overcompensated such that the net stress is a tensile stress. Preferably, the laser comprises one or several quantum well layers with a compression stress and a number of barrier layers with an excess tensile stress.
    Type: Grant
    Filed: June 14, 1996
    Date of Patent: September 21, 1999
    Assignee: Uniphase Opto Holdings, Inc.
    Inventors: Alfred R. Adams, Alistair T. Meney, James R. Downes, Adriaan Valster, Gerard A. Acket