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:
May. 21, 2021
Ntt, Inc., Tokyo, JP;
Shimpei Shimizu, Musashino, JP;
Takushi Kazama, Musashino, JP;
Takayuki Kobayashi, Musashino, JP;
Yutaka Miyamoto, Musashino, JP;
Takeshi Umeki, Musashino, JP;
NTT, Inc., Tokyo, JP;
Abstract
The present invention provides an optical amplification system () having a plurality of cascade-connected optical amplification units (), wherein the optical amplification units () comprise: a band division unit () that divides an optical signal into optical signals of two different bands; a polarized wave division unit () that divides the divided optical signals into two polarized wave components orthogonal to each other, an excitation light multiplexing unit () that multiplexes excitation light and the optical signals divided by the polarized wave division unit (); an amplification medium () that generates an optical parametric amplification and amplifies the optical signals; an excitation light division unit () that divides the excitation light and the optical signals amplified by the amplification medium (); a polarized wave synthesis unit () that synthesizes the two divided polarized wave components; and a band multiplexing unit () that multiplexes the two divided bands.