US Patent Issued to SUMITOMO ELECTRIC INDUSTRIES on May 12 for "Surface-emitting laser with optimized DBR structure and enhanced optical confinement" (Japanese Inventors)

ALEXANDRIA, Va., May 12 -- United States Patent no. 12,627,117, issued on May 12, was assigned to SUMITOMO ELECTRIC INDUSTRIES LTD. (Osaka, Japan).

"Surface-emitting laser with optimized DBR structure and enhanced optical confinement" was invented by Takeshi Aoki (Osaka, Japan) and Susumu Yoshimoto (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A surface-emitting laser includes a substrate, a lower DBR layer, a cavity layer, and an upper DBR layer stacked in order. The lower DBR layer has a first DBR layer, a contact layer, and a second DBR layer. The first and second DBR layers each include alternating first and second semiconductor layers containing aluminum, with the second layers having hig...