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:
Nov. 25, 2025
Filed:
Jan. 19, 2024
Nec Laboratories America, Inc., Princeton, NJ (US);
Junqiang Hu, Davis, CA (US);
Yue-Kai Huang, Princeton, NJ (US);
NEC Corporation, Tokyo, JP;
Abstract
Disclosed is a forward phase method using regular narrow line width CW laser, to cover the acoustic band with reduced processing speed, while tolerant laser frequency drift. A narrow linewidth CW laser is used to launch its power into an optical fiber at a transmitter side. At a receiver side, another narrow linewidth CW laser is used to coherently detect the received signal. The detected signal, which includes both X and Y polarizations, each having in-phase and quadrature to represent a 'complex' channel, are connected to an ADC's inputs. Signal processing following the ADC inputs and extracts the phase change of the acoustic band.