US Patent Issued to FURUKAWA ELECTRIC on July 14 for "Optical amplifying fiber, optical fiber amplifier, and optical communication system" (Japanese Inventors)

ALEXANDRIA, Va., July 14 -- United States Patent no. 12,683,349, issued on July 14, was assigned to FURUKAWA ELECTRIC Co. LTD. (Tokyo).

"Optical amplifying fiber, optical fiber amplifier, and optical communication system" was invented by Shigehiro Takasaka (Tokyo), Koichi Maeda (Tokyo), Keiichi Aiso (Tokyo), Shinichi Arai (Tokyo), Kazunori Mukasa (Tokyo), Yukihiro Tsuchida (Tokyo), Masanori Takahashi (Tokyo) and Ryuichi Sugizaki (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical amplifying fiber includes: at least one core portion including a rare earth element added therein; an inner cladding portion surrounding the at least one core portion, the inner cladding portion having a refractive inde...