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:
Nov. 20, 2018
Filed:
Apr. 30, 2015
Telefonaktiebolaget Lm Ericsson (Publ), Stockholm, SE;
Filippo Ponzini, Pisa, IT;
Boris Dortschy, Stockholm, SE;
Luca Giorgi, Pisa, IT;
Patryk Urban, Stockholm, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
An optical receiver () comprising: an input () arranged to receive a subcarrier multiplexing, SCM, optical signal () comprising an optical carrier and an optical subcarrier, each having a respective optical power; a carrier suppression element, CSE, () arranged to receive the SCM optical signal and having a rejection band that is tunable in frequency to partially suppress the optical carrier by a variable amount; an optical amplifier () having a variable gain and arranged to receive the SCM optical signal from the CSE and amplify the optical carrier and the optical subcarrier; a photoreceiver () arranged to receive the SCM optical signal from the amplifier; and a controller () arranged to cause frequency tuning of the rejection band and variation of the gain of the optical amplifier to adjust a ratio of the optical power of the optical carrier at the photoreceiver to the optical power of the optical subcarrier at the photoreceiver based on an indication of performance of the SCM optical signal.