ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,732,297, issued on Sept. 8, was assigned to 1FINITY Inc. (Kawasaki, Japan).

"Wavelength conversion device and optical transmission system" was invented by Hidenobu Muranaka (Kawasaki, Japan), Tomoyuki Kato (Yokohama, Japan) and Tomoaki Takeyama (Yokohama, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A wavelength conversion device includes an optical medium that converts a first wavelength-multiplexed light including a plurality of first wavelengths belonging to a first wavelength band to a second wavelength-multiplexed light including a plurality of second wavelengths belonging to a second wavelength band, a first monitor configured to monitor p...