US Patent Issued to NIPPON TELEGRAPH AND TELEPHONE on July 22 for "Optical access system, optical transmitter, optical receiver, optical transmission method and demodulation method" (Japanese Inventors)

ALEXANDRIA, Va., July 23 -- United States Patent no. 12,368,508, issued on July 22, was assigned to NIPPON TELEGRAPH AND TELEPHONE Corp. (Tokyo).

"Optical access system, optical transmitter, optical receiver, optical transmission method and demodulation method" was invented by Masamichi Fujiwara (Musashino, Japan) and Ryo Igarashi (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical access system includes an optical transmission device and an optical reception device. In the optical access system, the optical transmission device includes: a signal generation unit that generates a plurality of optical signals by generating monitoring control signals including identical information in pr...