The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 2001
Filed:
Sep. 20, 1999
Arthur D. Hay, Cheshire, CT (US);
Alan D. Kersey, South Glastonbury, CT (US);
Robert J. Maron, Cromwell, CT (US);
Phillip Edmund Pruett, Wallingford, CT (US);
Mark R. Fernald, Enfield, CT (US);
Guy A. Daigle, Plainville, CT (US);
F. Kevin Didden, Wallingford, CT (US);
Allen R. Davis, Glastonbury, CT (US);
Michael A. Davis, Glastonbury, CT (US);
Timothy J. Bailey, Longmeadow, MA (US);
Other;
Abstract
A fiber optic Bragg grating pressure sensor particularly suited for measuring ambient pressure of a fluid includes a pressuring detecting device,such as a glass element whose elastic deformation is proportional to applied pressure. An optical fiber,with an integral first grating,is wrapped at least once around the device and has at least a portion of its length fused to the device,such that elastic deformation of the device,generates a corresponding axial strain in the fiber,and/or the grating,and thus a corresponding change of the fiber length and/or characteristic reflectance wavelength of the grating,. A second grating,may be formed near the pressure detecting device,so as to sense ambient temperature but not be affected by deformation of the device,for temperature compensation. Also, the fiber,may have more than one grating or be doped at least between a pair of gratings,, to form a fiber laser or a DFB fiber laser which lasing wavelength changes with changing pressure.