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:
Mar. 10, 2026
Filed:
Mar. 03, 2021
Telefonaktiebolaget Lm Ericsson (Publ), Stockholm, SE;
Roberto Magri, Genoa, IT;
Alberto Deho, Genoa, IT;
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm, SE;
Abstract
Optical amplifier apparatus () comprising: an input () for an incoming optical signal (IN) comprising an optical supervisory channel, OSC, signal and service channel signals at channel wavelengths of a WDM channel wavelength grid; an output () for an outgoing optical signal (OUT); an optical amplifier, OA, () having an operating bandwidth including the WDM channel wavelength grid; a first optical drop filter () configured to drop from an IN signal an out-of-band, OOB, OSC signal at a wavelength outside the OA operating bandwidth; a second optical drop filter () configured to drop from an IN signal an in-band, IB, OSC signal at a wavelength within the OA operating bandwidth; an OSC signal output () configured to output the dropped OSC signal; an OSC signal input () configured to receive an outgoing OOB OSC or IB OSC signal; and an optical add filter () configured to add an outgoing OOB OSC or IB OSC signal to service channel signals at channel wavelengths of the WDM channel wavelength grid to form the OUT signal.