ALEXANDRIA, Va., June 6 -- United States Patent no. 12,283,793, issued on April 22, was assigned to Lumentum Japan Inc. (Kanagawa, Japan).
"Semiconductor optical device" was invented by Masaru Onga (Kanagawa, Japan) and Takayuki Nakajima (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A multi-terraced structure includes three or more sections with different thicknesses and adjacent to each other in a direction in which an optical waveguide extends. An adjacent pair of the three or more sections includes one section smaller in thickness and closer to an end face of the semiconductor multilayers and another section larger in thickness and farther from the end face of the semiconductor multilayers. The th...