The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2025
Filed:
Dec. 01, 2021
Nec Laboratories America, Inc., Princeton, NJ (US);
Fatih Yaman, Princeton, NJ (US);
Kohei Nakamura, Tokyo, JP;
Takanori Inoue, Tokyo, JP;
Eduardo Mateo Rodriguez, Tokyo, JP;
Shinsuke Fujisawa, Princeton, NJ (US);
Hussam Batshon, Neptune, NJ (US);
Yoshihisa Inada, Tokyo, JP;
Takaaki Ogata, Tokyo, JP;
Abstract
Aspects of the present disclosure describe systems, methods. and structures in which guided acoustic Brillouin (GAWBS) noise is measured using a homodyne measurement technique and demonstrated using a number of optical fibers, such fibers being commonly used in contemporary optical communications systems. The measurements are made with single spans and determined to be consistent with separate multi-span long-distance measurements. Additionally, a technique for preparing an optical fiber exhibiting superior GAWBS noise characteristics by reducing coherence length of the optical fiber by spinning the fiber at a high rate during the drawing process such that birefringence coherence length is reduced.