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:
Dec. 09, 2014
Filed:
Jul. 23, 2009
Marco Presi, Pisa, IT;
Fabio Cavaliere, Vecchiano, IT;
Andrea Chiuchiarelli, Pisa, IT;
Pallab Choudhury, Pisa, IT;
Ernesto Ciaramella, Rome, IT;
Giampiero Contestabile, Pisa, IT;
Luca Giorgi, Ponsacco, IT;
Roberto Proietti, Davis, CA (US);
Marco Presi, Pisa, IT;
Fabio Cavaliere, Vecchiano, IT;
Andrea Chiuchiarelli, Pisa, IT;
Pallab Choudhury, Pisa, IT;
Ernesto Ciaramella, Rome, IT;
Giampiero Contestabile, Pisa, IT;
Luca Giorgi, Ponsacco, IT;
Roberto Proietti, Davis, CA (US);
Telefonaktiebolaget LM Ericsson (Publ), Stockholm, SE;
Abstract
A reflective optical network () comprises an optical network unit () and an optical receiver (). The optical network unit () comprises a reflective optical modulator () arranged to receive a seed optical signal, and a transmitter controller () arranged to receive a data signal () and to control the modulator () to apply the data signal () to the seed optical signal, to form an optical data signal. The transmitter controller () is arranged to process the data signal () to substantially prevent the optical data signal comprising spectral components at frequencies lower than a cut-off frequency, being the frequency at which a power spectral density of said optical data signal is lower than a peak power spectral density of said optical signal by a cut-off power value. The optical receiver () comprises an electrical domain high pass filter () having a cut-off frequency higher than a linewidth of the seed optical signal.