Patents by Inventor James L. Arroyo

James L. Arroyo 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).

  • Low cost fiber optic velocity sensor for sonar applications
    Patent number: 7675627
    Abstract: A fiber optic sensor includes a housing having first and second end plates with a sidewall extending therebetween with the sidewall having an inwardly facing groove. A flexural disk having a central passage therethrough has an outer edge portion mounted in the inwardly facing groove in the housing. The flexural disk has a stepped thickness that is thinner at the outer edge portion than at a region spaced apart from the housing. A first fiber optic coil is mounted on a first side of the flexural disk in the thicker region of the flexural disk, and a second optical fiber is mounted on a second side of the flexural disk opposite the first fiber optic coil. The first and second fiber optic coils are optically coupled together by a fiber optic coupler to form an interferometer that produces an output signal in response to axial acceleration of the flexural disk.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: March 9, 2010
    Assignee: Northrop Grumman Guidance and Electronic Company, Inc.
    Inventors: Michael J. Tweedy, James L. Arroyo, Shen-Hui L. Wu
  • Low cost fiber optic velocity sensor for sonar applications
    Publication number: 20090091764
    Abstract: A fiber optic sensor includes a housing having first and second end plates with a sidewall extending therebetween with the sidewall having an inwardly facing groove. A flexural disk having a central passage therethrough has an outer edge portion mounted in the inwardly facing groove in the housing. The flexural disk has a stepped thickness that is thinner at the outer edge portion than at a region spaced apart from the housing. A first fiber optic coil is mounted on a first side of the flexural disk in the thicker region of the flexural disk, and a second optical fiber is mounted on a second side of the flexural disk opposite the first fiber optic coil. The first and second fiber optic coils are optically coupled together by a fiber optic coupler to form an interferometer that produces an output signal in response to axial acceleration of the flexural disk.
    Type: Application
    Filed: October 5, 2007
    Publication date: April 9, 2009
    Inventors: Michael J. Tweedy, James L. Arroyo, Shen-Hui L. Wu