Patents by Inventor Andrew David Barfoot

Andrew David Barfoot 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 frequency comb source for fiber sensor interferometer arrays
    Patent number: 10871592
    Abstract: An interrogation system may be coupled to a fiber-optic cable positioned in a wellbore to interrogate a plurality of optical sensors coupled to the fiber-optic cable. The interrogation system may include an optical frequency comb source having a plurality of narrowband optical carriers transmitting light to the plurality of optical sensors. Each of the plurality of optical sensors may include a pair of partial reflectors to reflect the light transmitted by the optical frequency comb to one or more optical receivers to receive the reflection signals In some aspects, the interrogation system may include a de-interleaver device for separating reflected light signals having adjacent wavelength into separate optical waveguides. In additional aspects, interrogation system may also include a data processing system having a processing device for performing interferometric measurements using the reflected light signals.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: December 22, 2020
    Assignee: Halliburton Energy Services Inc.
    Inventors: Andrew David Barfoot, Han-Sun Choi, Xinwei Lan
  • Optical Frequency Comb Source For Fiber Sensor Interferometer Arrays
    Publication number: 20180313974
    Abstract: An interrogation system may be coupled to a fiber-optic cable positioned in a wellbore to interrogate a plurality of optical sensors coupled to the fiber-optic cable. The interrogation system may include an optical frequency comb source having a plurality of narrowband optical carriers transmitting light to the plurality of optical sensors. Each of the plurality of optical sensors may include a pair of partial reflectors to reflect the light transmitted by the optical frequency comb to one or more optical receivers to receive the reflection signals In some aspects, the interrogation system may include a de-interleaver device for separating reflected light signals having adjacent wavelength into separate optical waveguides. In additional aspects, interrogation system may also include a data processing system having a processing device for performing interferometric measurements using the reflected light signals.
    Type: Application
    Filed: November 30, 2015
    Publication date: November 1, 2018
    Inventors: Andrew David Barfoot, Han-Sun Choi, Xinwei Lan