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. 20, 2015
Filed:
Dec. 09, 2011
Gwillerm Froc, Rennes Cedex, FR;
Christophe Mangin, Rennes Cedex, FR;
Gwillerm Froc, Rennes Cedex, FR;
Christophe Mangin, Rennes Cedex, FR;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A device and method to allow to estimate drift induced by temperature variation in a network including a frequency splitter based on a Mach-Zehnder, or alike component, and to track it over time, by adding mirrors to the unused port of the Mach-Zehnder components. Doing so, both OLT and ONU are able to scan a band of frequencies. The frequency corresponding to the nominal wavelength of the component will be reflected on the other port on the same side of the Mach-Zehnder while other frequencies will go through the Mach-Zehnder to be reflected by the mirror and come back to the emitter. By measuring the reflected signal while scanning frequencies, the actual nominal wavelength of the component can be determined.