US Patent Issued to NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY on Dec. 16 for "Method and apparatus for estimating quality of optical signal" (Japanese Inventor)

ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,500,667, issued on Dec. 16, was assigned to NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY (Tokyo).

"Method and apparatus for estimating quality of optical signal" was invented by Ryousuke Matsumoto (Ibaraki, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "In order to estimate an upper limit value of a bit error rate in an optical transmission unit for an optical transmission system in which an optical sender and an optical receiver are connected each other through the optical transmission unit that utilizes plural spatial resources, and coherent detection is used, after obtaining an amplitude of each crosstalk for different spati...