US Patent Issued to NEC on May 20 for "Optical amplifier, optical amplifier equalizing method, and transmission system" (Japanese Inventors)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,308,599, issued on May 20, was assigned to NEC Corp. (Tokyo).

"Optical amplifier, optical amplifier equalizing method, and transmission system" was invented by Keiichi Matsumoto (Tokyo), Emmanuel Le Taillandier De Gabory (Tokyo) and Shigeyuki Yanagimachi (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "The optical amplifier, which amplifies wavelength multiplexed signal light, comprises: a multi-core optical fiber which includes cladding and a first core and a second core disposed in the cladding, and which is doped with rare-earth ions; an excitation light source for supplying excitation light to the cladding of the multi-core optical fiber; and a...