US Patent Issued to NEC on July 21 for "Optical amplifier" (Japanese Inventor)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,689,172, issued on July 21, was assigned to NEC Corp. (Tokyo).

"Optical amplifier" was invented by Takefumi Oguma (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "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 inc...