Patents by Inventor Parag V Kelkar

Parag V Kelkar 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).

  • Method and apparatus for arbitrary waveform generation using photonics
    Patent number: 6724783
    Abstract: An apparatus and method for synthesizing waveforms with arbitrary amplitude, frequency, and phase modulation. Pulses from a broadband (supercontinuum) optical source are filtered into a plurality of wavelength channels, and the intensity of each wavelength channel is adjusted to an appropriate level depending on the desired shape of the envelope of the output pulse. The envelope of the sampling wavelength channels can be stretched, compressed, or inverted in the time domain later using a dispersive medium. After time domain manipulation, the optical pulse train is observed with a combination of high-speed photodetectors and a radio frequency low-pass filter, a low-speed photodetector.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: April 20, 2004
    Assignee: The Regents of the University of California
    Inventors: Bahram Jalali, Parag V. Kelkar
  • Single parameter gain slope adjuster for an optical system
    Patent number: 6646789
    Abstract: An optical device comprises an optical amplifier to amplify optical signals, optical pumps coupled to and providing optical pump power to least one amplifying stage of the optical amplifier, so as to produce gain in the said optical amplifier and, a tunable optical filter coupled to the optical amplifier. The optical filter changes the gain slope of the optical amplifier in response to a change in a single parameter of the optical filter. The optical amplifier also includes at least one controller adjusting said single parameter of the optical filter and controlling the optical pumps.
    Type: Grant
    Filed: February 22, 2002
    Date of Patent: November 11, 2003
    Assignee: Corning Incorporated
    Inventors: Parag V Kelkar, Peter G. Wigley, Kai Wundke
  • Single parameter gain slope adjuster for an optical system
    Publication number: 20020159135
    Abstract: An optical device comprises an optical amplifier to amplify optical signals, optical pumps coupled to and providing optical pump power to least one amplifying stage of the optical amplifier, so as to produce gain in the said optical amplifier and, a tunable optical filter coupled to the optical amplifier. The optical filter changes the gain slope of the optical amplifier in response to a change in a single parameter of the optical filter. The optical amplifier also includes at least one controller adjusting said single parameter of the optical filter and controlling the optical pumps.
    Type: Application
    Filed: February 22, 2002
    Publication date: October 31, 2002
    Inventors: Parag V. Kelkar, Peter G. Wigley, Kai Wundke
  • Method and apparatus for arbitrary waveform generation using photonics
    Publication number: 20020067747
    Abstract: An apparatus and method for synthesizing waveforms with arbitrary amplitude, frequency, and phase modulation. Pulses from a broadband (supercontinuum) optical source are filtered into a plurality of wavelength channels, and the intensity of each wavelength channel is adjusted to an appropriate level depending on the desired shape of the envelope of the output pulse. The envelope of the sampling wavelength channels can be stretched, compressed, or inverted in the time domain later using a dispersive medium. After time domain manipulation, the optical pulse train is observed with a combination of high-speed photodetectors and a radio frequency low-pass filter, a low-speed photodetector.
    Type: Application
    Filed: April 13, 2001
    Publication date: June 6, 2002
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Bahram Jalali, Parag V. Kelkar