ALEXANDRIA, Va., June 18 -- United States Patent no. 12,328,145, issued on June 10, was assigned to FUJITSU OPTICAL COMPONENTS Ltd. (Kawasaki, Japan).

"Optical transmitter and control method of tunable optical filter" was invented by Takeyasu Tomioka (Sapporo, Japan) and Shuichi Yasuda (Sapporo, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical transmitter includes an optical modulator, a tunable optical filter, a temperature sensor, and a processor. The tunable optical filter is provided on an output side of the optical modulator and transmits light of a frequency corresponding to a control voltage. The temperature sensor detects a temperature around the tunable optical filter. The processor d...