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:
Sep. 02, 2025
Filed:
Nov. 15, 2022
Nec Laboratories America, Inc., Princeton, NJ (US);
Yaowen Li, Princeton, NJ (US);
Jian Fang, Princeton, NJ (US);
Shuj Murakami, Monmouth Junction, NJ (US);
Philip Ji, Cranbury, NJ (US);
Ting Wang, West Windsor, NJ (US);
NEC Corporation, Tokyo, JP;
Abstract
Systems, methods, and structures for colorless distributed fiber optic sensing/distributed vibration sensing (DOFS/DVS) over dense wavelength division multiplexing (DWDM) telecommunications facilities that operate over a C-band wavelength range spanning from 1525 nm to 1565 nm wherein the DOFS/DVS systems exhibit suitable reconfigurability of its wavelength to match a wavelength of a desired testing channel providing DOFS/DVS capabilities to existing DWDM communications infrastructure as a retrofit. The DFOS/DVS systems include an optical sensor fiber; a colorless DFOS/DVS interrogator in optical communication with the optical sensor fiber and configured to generate optical pulses, introduce the generated pulses into the optical sensor fiber, and receive backscattered signals from the optical sensor fiber; and an intelligent analyzer configured to analyze colorless DFOS/DVS data received by the DFOS/DVS interrogator and determine from the backscattered signals, vibrational activity occurring at locations along the optical sensor fiber.