ALEXANDRIA, Va., March 24 -- United States Patent no. 12,586,975, issued on March 24, was assigned to NTT Inc. (Tokyo).
"Excitation device for optical amplifier" was invented by Hiroto Kawakami (Musashino, Japan), Shoichiro Kuwahara (Musashino, Japan) and Yoshiaki Kisaka (Musashino, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pump light generation unit of an optical amplifier pumping device outputs pump light with a single wavelength or a plurality of wavelengths from a plurality of output ports. A pump light multiplexing unit polarization-multiplexes or wavelength-multiplexes the plurality of pieces of pump light which has been output from the pump light generation unit. A polarization scrambler ...