US Patent Issued to NIPPON TELEGRAPH AND TELEPHONE on May 27 for "Mode field diameter measuring method and mode field diameter measuring device" (Japanese Inventors)

ALEXANDRIA, Va., June 17 -- United States Patent no. 12,313,493, issued on May 27, was assigned to NIPPON TELEGRAPH AND TELEPHONE Corp. (Tokyo).

"Mode field diameter measuring method and mode field diameter measuring device" was invented by Atsushi Nakamura (Musashino, Japan), Yusuke Koshikiya (Musashino, Japan) and Nazuki Honda (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention has an object to provide a mode field diameter measurement method enabling easily measuring a mode field diameter in an optical fiber, which is capable of propagating a fundamental mode (LP01 mode) and a first higher order mode (LP11 mode), without using a mode multiplexer, and a measurement device...