Patents by Inventor Edwin Y. B. Pun

Edwin Y. B. Pun 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 lasers
    Patent number: 4663761
    Abstract: A semiconductor diode laser of the kind in which laser radiation occurs in an active region in a layer (3) of semiconductor material wherein optical confinement of the radiation to a portion (19) of said layer so as to direct light from said region to a light waveguide is obtained by virtue of differences in the refractive index of different parts of said layer arising from mechanical stresses in said layer, produced, for example, by differential thermal contraction during fabrication of the laser of different parts (96, 11b and 13, 15 or 21 and 5 or 23 and 3) of the laser structure.
    Type: Grant
    Filed: October 1, 1984
    Date of Patent: May 5, 1987
    Assignee: The General Electric Company, p.l.c.
    Inventors: Joseph A. Barnard, Edwin Y. B. Pun