ALEXANDRIA, Va., May 26 -- United States Patent no. 12,640,814, issued on May 26, was assigned to NEC Corp. (Tokyo).
"Optical transmission system, and optical transmission method" was invented by Hitoshi Takeshita (Tokyo), Keiichi Matsumoto (Tokyo), Hidemi Noguchi (Tokyo) and Kohei Hosokawa (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "The optical transmission system of the present invention includes a multi-core transmission path which includes a plurality of cores, and in which optical signals propagate through the plurality of cores, a first optical repeating means for amplifying the optical signals by individually exciting first multi-core optical amplification mediums, and a second optical repea...