US Patent Issued to NIPPON TELEGRAPH AND TELEPHONE on March 4 for "Optical multiplexing/demultiplexing method, optical multiplexing/demultiplexing circuit, and manufacturing method thereof" (Japanese Inventors)

ALEXANDRIA, Va., March 5 -- United States Patent no. 12,242,111, issued on March 4, was assigned to NIPPON TELEGRAPH AND TELEPHONE Corp. (Tokyo).

"Optical multiplexing/demultiplexing method, optical multiplexing/demultiplexing circuit, and manufacturing method thereof" was invented by Takui Uematsu (Musashino, Japan), Hidenobu Hirota (Musashino, Japan) and Hiroyuki Iida (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical multiplexing and demultiplexing method of the present disclosure includes arranging, face to face, a polished surface of a coated optical fiber whose side surface is polished to a core or a vicinity of the core and a polished surface of an optical waveguide whose prop...