US Patent Issued to NEC on June 23 for "Optical amplification device and optical amplification method" (Japanese Inventors)

ALEXANDRIA, Va., July 15 -- United States Patent no. 12,665,375, issued on June 23, was assigned to NEC Corp. (Tokyo).

"Optical amplification device and optical amplification method" was invented by Hitoshi Takeshita (Tokyo), Keiichi Matsumoto (Tokyo) and Hidemi Noguchi (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention addresses the problem that, when an optical amplification device having a plurality of optical transmission paths, such as multi-core optical fibers, is used for bidirectional communication, it is difficult to construct an optical transmission system optimized for all of signal lights having different transmission directions. The optical amplification device of the pr...