ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,746, issued on March 18, was assigned to II-VI DELAWARE INC. (Wilmington, Del.).
"Small integrated free space circulator" was invented by Xi Zheng (Fujian, China), Guanglong Yu (Fujian, China), Xu Jia (Fujian, China), Haifeng Chen (Fujian, China) and Ce Ren (Fujian, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A small integrated free space circulator, comprising a first polarizing beam splitter (1), a half-wave plate (2), a Faraday rotating plate (3), a beam splitter (4), a quarter-wave plate (5), and a pair of reflective plates (6, 7), wherein the first polarizing beam splitter (1), the half-wave plate (2), the Faraday rotating plate (3), ...