US Patent Issued to NEC on June 24 for "Mach-Zehnder type optical modulator, optical transceiver, and dispersion compensation method" (Japanese Inventor)

ALEXANDRIA, Va., June 25 -- United States Patent no. 12,339,561, issued on June 24, was assigned to NEC Corp. (Tokyo).

"Mach-Zehnder type optical modulator, optical transceiver, and dispersion compensation method" was invented by Ryo Kurahashi (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A first directional coupler branching input light into a cross-port path having a branching ratio Eta and a bar-port path having a branching ratio 1-Eta. A first arm propagating light from the cross-port path of the first directional coupler; a second arm propagating light from the bar-port path of the first directional coupler. A second directional coupler outputting output light acquired by combining the light bei...