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:
Jun. 16, 2026
Filed:
Mar. 22, 2022
Nec Corporation, Tokyo, JP;
Takeshi Takeuchi, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
Provided is an optical amplifier, an optical relay and an optical communication system that can amplify signal light of a plurality of systems and that can realize a reduction in costs. This optical amplifier amplifies and outputs signal light of a plurality of systems, the amplifier including: a plurality of impurity-doped optical fiber amplification units; a plurality of excitation light sources; a plurality of excitation light demultiplexing units; a plurality of excitation light multiplexing/demultiplexing units; and a plurality of multiplexing units. The plurality of excitation light sources include at least a first excitation light source and a second excitation light source that are driven commonly by a first driving current, and a third excitation light source that is driven by a second driving current of a different system than the first driving current.