Patents by Inventor Reich Watterson

Reich Watterson 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).

  • Publication number: 20040091002
    Abstract: A compact wavelength monitoring and control assembly for a narrow band (i.e., laser) source is provided, comprising two narrow bandpass, wavelength selective transmission filter elements of Fabry-Perot structure through which two separate collimated beams from a laser source are directed onto two photodetectors. The spacing of the multiple transmission maxima for one etalon is chosen to match that of the desired set of frequencies to be used for locking purposes. The spacing of the transmission maxima for the second etalon is used, in combination with a dielectric filter, to generate a wavelength fiducial to denote an absolute frequency. The spacing of the second etalon is chosen to be much wider than the frequency grid etalon. A control circuit processes the simultaneously acquired signals from the two detectors as the laser wavelength is varied.
    Type: Application
    Filed: December 23, 2002
    Publication date: May 13, 2004
    Inventors: Reich Watterson, Parviz Tayebati, Don McDaniel, Kevin McCallion
  • Publication number: 20040032885
    Abstract: An optical fiber wavelength reference device for tuning a tunable Fabry-Perot filter and/or a tunable VCSEL to a desired frequency, where the device uses a fiber etalon to generate a pattern of reference frequencies against which the device is tuned.
    Type: Application
    Filed: April 8, 2003
    Publication date: February 19, 2004
    Inventors: Parviz Tayebati, Reich Watterson, Kevin McCallion
  • Patent number: 6677570
    Abstract: According to an aspect of the present invention, a power detector including a photodiode and a logarithmic transimpedance amplifier is mounted inside a hermetically sealed package in such a way that the photodiode and the logarithmic transimpedance amplifier are located on the same thermally conductive substrate.
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: January 13, 2004
    Assignee: Nortel Networks Limited
    Inventors: Yakov Kogan, Donald McDaniel, Reich Watterson
  • Patent number: 6665076
    Abstract: A wavelength reference device for tuning a tunable Fabry-Perot filter and/or a tunable VCSEL to a desired frequency, where the device uses a modified Michelson interferometer to generate a series of reference frequencies
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: December 16, 2003
    Assignee: CoreTek, Inc.
    Inventors: Reich Watterson, Parviz Tayebati
  • Patent number: 6594022
    Abstract: A wavelength reference device for tuning a tunable Fabry-Perot filter and/or a tunable VCSEL to a desired frequency, where the device uses a Fizeau interferometer and a position sensitive detector, with the position sensitive detector being used to measure the location of the maximum reflected power from the interferometer, whereby to determine the wavelength of laser radiation for tuning the device.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: July 15, 2003
    Assignee: CoreTek, Inc.
    Inventors: Reich Watterson, Parviz Tayebati, Kevin McCallion, Daryoosh Vakhshoori
  • Patent number: 6546028
    Abstract: An optical fiber wavelenght reference device for tuning a tunable Fabry-Perot filter and/or a tunable VCSEL to a desired frequency, where the device uses a fiber etalon to generate a pattern of reference frequencies against which the device is tuned.
    Type: Grant
    Filed: August 10, 2000
    Date of Patent: April 8, 2003
    Assignee: CoreTek, Inc.
    Inventors: Parviz Tayebati, Reich Watterson, Kevin McCallion
  • Patent number: 6526079
    Abstract: A compact wavelength monitoring and control assembly for a narrow band source is provided comprising a narrow bandpass, wavelength selective transmission filter element, of Fabry-Perot structure, through which two collimated beams from a laser source are directed onto two photodetectors. The differential output of the two photodetectors is used in a feedback loop to stabilize the source to the desired wavelength. Through the dependence of the wavelength transmission of the Fabry-Perot etalon on angle and physical parameters, a wavelength variation of the source is converted into a transmission loss, which is different for the detectors, so that the wavelength change is detected by changes in the signals output from the detectors. Through the controlled variation of the source wavelength in the vicinity of the transmission maximum of the etalon, the absolute frequency of the Fabry-Perot locking point may be confirmed by the variation of the ratio of the detector signals.
    Type: Grant
    Filed: August 10, 2000
    Date of Patent: February 25, 2003
    Assignee: CoreTek, Inc.
    Inventors: Reich Watterson, Parviz Tayebati, Kevin McCallion
  • Patent number: 6498800
    Abstract: A compact wavelength monitoring and control assembly for a narrow band (i.e., laser) source is provided, comprising two narrow bandpass, wavelength selective transmission filter elements of Fabry-Perot structure through which two separate collimated beams from a laser source are directed onto two photodetectors. The spacing of the multiple transmission maxima for one etalon is chosen to match that of the desired set of frequencies to be used for locking purposes. The spacing of the transmission maxima for the second etalon is used, in combination with a dielectric filter, to generate a wavelength fiducial to denote an absolute frequency. The spacing of the second etalon is chosen to be much wider than the frequency grid etalon. A control circuit processes the simultaneously acquired signals from the two detectors as the laser wavelength is varied.
    Type: Grant
    Filed: August 10, 2000
    Date of Patent: December 24, 2002
    Assignee: CoreTek, Inc.
    Inventors: Reich Watterson, Parviz Tayebati, Don McDaniel, Kevin McCallion
  • Publication number: 20020005988
    Abstract: An etalon comprising a first plate and a second plate positioned in parallel to one another and separated by a given distance, a single block spacer extending the given distance between the first plate and the second plate, and the single block spacer defining a chamber extending the given distance between the first plate and the second plate.
    Type: Application
    Filed: May 17, 2001
    Publication date: January 17, 2002
    Inventors: Christopher J. Duska, Jose Downes, Reich Watterson, Kevin McCallion