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:
Jul. 21, 2026
Filed:
Feb. 16, 2022
Nec Corporation, Tokyo, JP;
Takefumi Oguma, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
An optical amplifier according to the present disclosure includes a first excitation light coupler, a first optical amplification medium, a first optical switch configured to output the optical communication signal output from the first optical amplification medium to either a first branch path HGP or a second branch path, and a second optical switch configured to transmit the optical communication signal transmitted through the branch path to downstream, and the first branch HGP path includes a second optical amplification medium, a second excitation light coupler configured to synthesize the optical communication signal and the excitation light directed towards the second optical amplification medium, and a first gain equalizer, and the second branch path includes a third excitation coupler configured to synthesize the optical communication signal and the excitation light directed towards the first optical switch, and a second gain equalizer.