ALEXANDRIA, Va., March 3 -- United States Patent no. 12,567,719, issued on March 3, was assigned to NTT Inc. (Tokyo).
"Optical semiconductor chip" was invented by Shigeru Kanazawa (Musashino, Japan), Yuta Ueda (Musashino, Japan), Takahiko Shindo (Musashino, Japan) and Meishin Chin (Musashino, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An optical semiconductor chip of the present disclosure includes a high frequency line between an electrode pad receiving a modulation signal and a modulation electrode on the optical waveguide constituting a laser. The depletion layer capacitance generated in an active layer of the optical waveguide is cancelled by an inductance component of the high frequency line. ...