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:
May. 24, 2005
Filed:
Mar. 19, 2004
Joshua P. Averett, Radford, VA (US);
Jennifer L. Elster, Blacksburg, VA (US);
Mark E. Jones, Blacksburg, VA (US);
Charles D. Pennington, Blacksburg, VA (US);
Roger L. Van Tassell, Blacksburg, VA (US);
Joshua P. Averett, Radford, VA (US);
Jennifer L. Elster, Blacksburg, VA (US);
Mark E. Jones, Blacksburg, VA (US);
Charles D. Pennington, Blacksburg, VA (US);
Roger L. Van Tassell, Blacksburg, VA (US);
Luna Innovations, Incorporated, Blacksburg, VA (US);
Abstract
A fiber-optic method for making simultaneous multiple parameter measurements employs an optical fiber sensor having at least one long period grating disposed therein. An excitation is created in the optical fiber sensor wherein a plurality of evanescent field sensing depths result. At least two long period grating signatures are created. When the optical fiber sensor is exposed to at least one material, changes in the material are identified by simultaneously measuring and comparing shifts in each long period grating signature; correlating the shifts to changes in the material; and solving a series of equations that compare changes in the coupling wavelength for a specific loss band. A reactive coating may be applied to the optical fiber sensor proximate to the long period grating such that changes in the reactive coating as it reacts with the material may also be monitored.