ALEXANDRIA, Va., June 6 -- United States Patent no. 12,282,188, issued on April 22, was assigned to FURUKAWA ELECTRIC Co. LTD. (Tokyo).
"Ring-resonator filter device" was invented by Junichi Hasegawa (Tokyo) and Noritaka Matsubara (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A ring-resonator filter device includes: a waveguide device that includes a core. Further, the core constitutes two ring resonator filters, each of the two ring resonator filters includes two arm portions, a ring-shaped portion, and two optical coupling/branching portions that optically couple the two arm portions and the ring-shaped portion, respectively, and the two ring-shaped portions cross each other."
The patent was filed...