ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,531,635, issued on Jan. 20, was assigned to Fujitsu Ltd. (Kawasaki, Japan).
"Optical transmitter and bias control method" was invented by Hideyuki Matsuura (Sendai, Japan), Kosuke Komaki (Kawasaki, Japan), Hidetoshi Sato (Kawasaki, Japan) and Katsutoshi Ishidou (Tooda, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An optical transmitter includes: an optical modulator of a Mach-Zehnder type using an InP-based material; a bias controller configured to control a DC bias applied to the optical modulator; a monitor configured to monitor output light of the optical modulator to generate a monitor signal; and a corrector configured to correct a gain of ...