Patents by Inventor Shane Duggan

Shane Duggan 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).

  • Phase modulator for optical signal using multimode interference couplers
    Patent number: 11539444
    Abstract: The invention provides an optical system and method for outputting a modulated signal comprising a single multimode interference (MMI) device having at least two inputs configured with a fixed phase and an output, wherein the output modulated signal is controlled by modulating the input power of at 5 least one of the inputs. The invention only requires a single MMI device to operate as the relative phase between the two inputs are fixed relative each other and one of the inputs can be used to modulate the output by modulating the power at a single input. In further embodiments, the invention shows how correct phases can be set by a single MMI device. Thus, no more than two 10 MMIs are required in conjunction with phase or amplitude modulating elements to fully generate a BPSK or QPSK signal.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: December 27, 2022
    Assignee: University College Cork—National University Of Ireland, Cork
    Inventors: Frank Peters, Shane Duggan
  • PHASE MODULATOR FOR OPTICAL SIGNAL USING MULTIMODE INTERFERENCE COUPLERS
    Publication number: 20210328683
    Abstract: The invention provides an optical system and method for outputting a modulated signal comprising a single multimode interference (MMI) device having at least two inputs configured with a fixed phase and an output, wherein the output modulated signal is controlled by modulating the input power of at 5 least one of the inputs. The invention only requires a single MMI device to operate as the relative phase between the two inputs are fixed relative each other and one of the inputs can be used to modulate the output by modulating the power at a single input. In further embodiments, the invention shows how correct phases can be set by a single MMI device. Thus, no more than two 10 MMIs are required in conjunction with phase or amplitude modulating elements to fully generate a BPSK or QPSK signal.
    Type: Application
    Filed: July 17, 2019
    Publication date: October 21, 2021
    Inventors: Frank Peters, Shane Duggan