Patents by Inventor Jan P. van der Ziel

Jan P. van der Ziel 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 system including wavelength-tunable semiconductor laser
    Patent number: 4980892
    Abstract: Optical systems which include a particular type of wavelength-tunable semiconductor laser are disclosed. Significantly, the active layer of the laser includes a doping superlattice layer. Even more significantly, wavelength-tunability is achieved by nonuniformly, optically and/or electrically pumping the laser.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: December 25, 1990
    Assignee: AT&T Bell Laboratories
    Inventors: John E. Cunningham, Timothy D. Harris, Erdmann F. Schubert, Jan P. van der Ziel
  • Passively mode locked laser having a saturable absorber
    Patent number: 4435809
    Abstract: A region of saturable absorption is produced in semiconductor lasers by proton bombardment and results in subpicosecond optical pulses.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: March 6, 1984
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Won-Tien Tsang, Jan P. van der Ziel