US Patent Issued to NTT on Dec. 16 for "Optical fiber" (Japanese Inventors)

ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,498,516, issued on Dec. 16, was assigned to NTT Inc. (Tokyo).

"Optical fiber" was invented by Yuto Sagae (Musashino, Japan), Takashi Matsui (Musashino, Japan) and Kazuhide Nakajima (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An object of the present invention is to achieve a low delay core applicable to a Master channel of a Master-Slave CPE (MS-CPE) transmission method with a general-purpose refractive index distribution structure.An optical fiber according to the present invention is a single-mode optical fiber, and has an SI-type refractive index distribution structure, in which a clad region relative refractive index difference ...