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:
Apr. 24, 2018
Filed:
Nov. 04, 2015
Exfo Inc., Quebec, CA;
Gang He, Quebec, CA;
Daniel Gariepy, Quebec, CA;
EXFO Inc., Quebec, CA;
Abstract
There are provided methods and devices for determining a quality parameter characterizing an optical communication signal, the methods being performed by signal detection devices. At the transmitting end, there are obtained a signal power Pof a first optical signal, a signal power Pof a second optical signal, a signal power Pof a third optical signal, optionally a signal power Pof a fourth optical signal, and a total signal power Ps of a channel where the first, second, third and optional fourth optical signals are located. At a detection point, there are further obtained a signal power P' of the first optical signal, a signal power P′ of the second optical signal, a signal power P′ of the third optical signal and optionally a signal power P′ of the fourth optical signal. There are then determined a signal deformation factor SDF and/or an optical signal to ASE noise ratio OSNR from the obtained signal powers.