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:
Jul. 30, 2024
Filed:
May. 06, 2022
Applicant:
Exfo Inc., Québec, CA;
Inventor:
Michel Leclerc, Québec, CA;
Assignee:
EXFO Inc., Quebec, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M 11/00 (2006.01); H04B 10/071 (2013.01); H04B 10/2513 (2013.01);
U.S. Cl.
CPC ...
G01M 11/3127 (2013.01); G01M 11/3145 (2013.01); H04B 10/071 (2013.01); H04B 10/2513 (2013.01);
Abstract
There is provided a technique to reduce the Rayleigh coherence noise in OTDR measurements using spectral averaging of OTDR traces while at least partly cancelling chromatic dispersion pulse broadening on the averaged OTDR trace by applying a chromatic dispersion correction prior to averaging the OTDR traces. By correcting for chromatic dispersion pulse broadening, it allows to reduce the Rayleigh coherence noise without impacting the OTDR spatial resolution.