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:
Feb. 11, 2014
Filed:
Sep. 18, 2009
Marco Presi, Pisa, IT;
Fabio Cavaliere, Vecchiano, IT;
Ernesto Ciaramella, Rome, IT;
Telefonaktiebolaget L M Ericsson (Publ), Stockholm, SE;
Abstract
A distribution node of a passive optical network (PON) comprises a first port for receiving a first optical continuous envelope modulated downstream data signal at a first wavelength (λ) from a first optical line termination unit (OLT) and a second port for receiving a second optical continuous envelope modulated downstream data signal at a second wavelength (λ) from a second optical line termination unit (OLT). A first converter (FBG-) performs continuous envelope modulation-to-intensity modulation conversion of the first optical downstream data signal and forwards the converted first optical downstream data signal (λ) to the first group of optical network units (ONU). A second converter (FBG-) performs continuous envelope modulation-to-intensity modulation conversion of the second optical downstream data signal and forwards the converted second optical downstream data signal (λ) to the second group of optical network units (ONU). The distribution node forwards a seed signal at the first wavelength (λ) to the second group of optical network units (ONU) and forwards a seed signal at the second wavelength (λ) to the first group of optical network units (ONU).