US Patent Issued to NIPPON TELEGRAPH AND TELEPHONE on July 29 for "Depolarizer and optical amplifier excitation apparatus" (Japanese Inventors)

ALEXANDRIA, Va., July 30 -- United States Patent no. 12,372,721, issued on July 29, was assigned to NIPPON TELEGRAPH AND TELEPHONE Corp. (Tokyo).

"Depolarizer and optical amplifier excitation apparatus" 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 depolarizer for depolarizing input light having a plurality of linearly polarized waves whose optical frequency interval is f includes: an input optical waveguide configured to propagate the input light while maintaining linear polarization; a first polarization-maintaining coupler configured to bifurcate the linearly polarized waves o...