US Patent Issued to NTT on Oct. 27 for "Optical amplification apparatus and optical amplification method" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,775,193, issued on Oct. 27, was assigned to NTT Inc. (Tokyo).

"Optical amplification apparatus and optical amplification method" was invented by Shimpei Shimizu (Musashino, Japan), Takushi Kazama (Musashino, Japan), Takayuki Kobayashi (Musashino, Japan), Yutaka Miyamoto (Musashino, Japan) and Takeshi Umeki (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical amplification device includes: a polarization demultiplexing unit that separates an optical signal into a first polarized wave and a second polarized wave; a first optical amplification unit that amplifies the first polarized wave by using a first amplification medium; a secon...