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. 16, 2011
Filed:
Feb. 04, 2009
Xin Chen, Corning, NY (US);
Joohyun Koh, Painted Post, NY (US);
Ming-jun LI, Horseheads, NY (US);
Daniel Aloysius Nolan, Corning, NY (US);
Xin Chen, Corning, NY (US);
Joohyun Koh, Painted Post, NY (US);
Ming-Jun Li, Horseheads, NY (US);
Daniel Aloysius Nolan, Corning, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
A detection system comprising: (i) an optical fiber, the optical fiber having (a) a length L≧1 km; (b) beat length between 10 m and 100 m; and (c) beat length uniformity over any distance of at least 100 m within the length L is characterized by standard deviation σ, where |σ|≦10 m; (ii) an OTDR coupled to the fiber and including (a) a radiation source providing pulsed radiation to the fiber, (b) a detection system capable of detecting radiation that is backscattered back through the fiber; and (iii) at least one polarizer situated between the fiber and the detector, such that the backscattered radiation passes through the polarizer before reaching the detector.