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:
Oct. 14, 2014
Filed:
May. 21, 2012
Jeong I. Kim, Suwon, KR;
Daniel Kominsky, Christiansburg, VA (US);
Gary Pickrell, Blacksburg, VA (US);
Ahmad Safaai-jazi, Blacksburg, VA (US);
Roger H Stolen, Gallatin, TN (US);
Anbo Wang, Blacksburg, VA (US);
Jeong I. Kim, Suwon, KR;
Daniel Kominsky, Christiansburg, VA (US);
Gary Pickrell, Blacksburg, VA (US);
Ahmad Safaai-Jazi, Blacksburg, VA (US);
Roger H Stolen, Gallatin, TN (US);
Anbo Wang, Blacksburg, VA (US);
Virginia Tech Intellectual Properties, Inc., Blacksburg, VA (US);
Abstract
A random array of holes is created in an optical fiber by gas generated during fiber drawing. The gas forms bubbles which are drawn into long, microscopic holes. The gas is created by a gas generating material such as silicon nitride. Silicon nitride oxidizes to produce nitrogen oxides when heated. The gas generating material can alternatively be silicon carbide or other nitrides or carbides. The random holes can provide cladding for optical confinement when located around a fiber core. The random holes can also be present in the fiber core. The fibers can be made of silica. The present random hole fibers are particularly useful as pressure sensors since they experience a large wavelength dependant increase in optical loss when pressure or force is applied.