US Patent Issued to LumentumRadiant on July 28 for "Semiconductor optical device" (Japanese Inventors)

ALEXANDRIA, Va., July 28 -- United States Patent no. 12,695,268, issued on July 28, was assigned to LumentumRadiant GmbH (Baar, Switzerland).

"Semiconductor optical device" was invented by Hironori Sakamoto (Sagamihara, Japan) and Shigenori Hayakawa (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A semiconductor optical device includes a substrate of a first conductivity type; an optical confinement layer of the first conductivity type, which is arranged above the substrate of the first conductivity type; a multi quantum well layer, which is arranged above the optical confinement layer of the first conductivity type, and comprises a plurality of well layers and a plurality of barrier layers; an optical...