ALEXANDRIA, Va., March 17 -- United States Patent no. 12,578,614, issued on March 17, was assigned to MITSUBISHI ELECTRIC Corp. (Tokyo).

"Semiconductor optical phase modulator and method of testing the same" was invented by Masakazu Takabayashi (Tokyo), Yosuke Suzuki (Tokyo), Satoshi Nishikawa (Tokyo) and Koichi Akiyama (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A semiconductor optical phase modulator includes an optical phase modulation element, a first semiconductor optical amplifier to amplify light input to the optical phase modulation element, and a second semiconductor optical amplifier to amplify modulated signal light output from the optical phase modulation element. A light input end of t...