Patents by Inventor Stephen Anthony Lynch

Stephen Anthony Lynch 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).

  • Self-pulsating laser diode and a method for causing a laser diode to output light pulses
    Patent number: 6804272
    Abstract: A semiconductor self-pulsating laser diode (1) comprises a wave guiding layer (2) sandwiched between lower and upper cladding layers (4, 5). A current blocking layer (8) defining a slot (10) through which pumping current is directed through the laser diode between upper and lower contact plates (5, 6) defines an active wave guiding region (15). The current blocking layer (8) is shaped by the formation of longitudinally extending recesses (12) for defining the active wave guiding region (15) such that a central pulse light generating region (17) is formed surrounded by an outer light propagating region (18). As the laser diode is continuously pumped, an effective step change in refractive index between the wave guiding layer (2) and the outer light propagating region (18) is formed, and the carrier density and refractive index profiles across the active wave guiding region (15) vary as each light pulse cycle progresses.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: October 12, 2004
    Assignee: The Provost, Fellows and Scholars of the College of the Holy and Undivided Trinity of Queen Elizabeth Near Dublin
    Inventors: James Christopher O'Gorman, Paul McEvoy, Stephen Anthony Lynch, Pascal Michel Landais
  • Self-pulsating laser diode and a method for causing a laser diode output light pulses
    Publication number: 20030185262
    Abstract: A semiconductor self-pulsating laser diode (1) comprises a wave guiding layer (2) sandwiched between lower and upper cladding layers (4, 5). A current blocking layer (8) defining a slot (10) through which pumping current is directed through the laser diode between upper and lower contact plates (5, 6) defines an active wave guiding region (15). The current blocking layer (8) is shaped by the formation of longitudinally extending recesses (12) for defining the active wave guiding region (15) such that a central pulse light generating region (17) is formed surrounded by an outer light propagating region (18). As the laser diode is continuously pumped, an effective step change in refractive index between the wave guiding layer (2) and the outer light propagating region (18) is formed, and the carrier density and refractive index profiles across the active wave guiding region (15) vary as each light pulse cycle progresses.
    Type: Application
    Filed: March 14, 2003
    Publication date: October 2, 2003
    Inventors: James Christopher O'Gorman, Paul McEvoy, Stephen Anthony Lynch, Pascal Michel Landais