US Patent Issued to TDK on July 28 for "Optical coupler and visible light source module" (Japanese Inventors)

ALEXANDRIA, Va., July 28 -- United States Patent no. 12,693,474, issued on July 28, was assigned to TDK Corp. (Tokyo).

"Optical coupler and visible light source module" was invented by Yasuhiro Takagi (Tokyo), Hiroki Hara (Tokyo), Atsushi Shimura (Tokyo), Hajime Utsunomiya (Tokyo) and Jiro Yoshinari (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical coupler includes: light input ports on a first side surface; monitoring light output ports on a second side surface; one light output port on a third side surface; and multimode-interference-type optical coupling parts, a first multimode-interference coupling part is connected to a first light-input-side waveguide on the input side, and to a first m...