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. 20, 2024
Filed:
Sep. 11, 2020
Petroliam Nasional Berhad (Petronas), Kuala Lumpur, MY;
PETROLIAM NASIONAL BERHAD (PETRONAS), Kuala Lumpur, MY;
Abstract
This optical fiber distribution measurement system of distributed optical fiber sensing type includes: a tunable wavelength distributed feedback LD () for obtaining a DTSS signal through frequency shift analysis; an external resonance laser () for obtaining a DAS signal through phase shift analysis; a pulse compression coding circuit () including an intensity modulator () and an phase modulator (); an acousto-optic switch (); an erbium doped optical fiber amplifier (); a circulator (); a diversity device (); a digitizer (); a CPU (); and a serial transfer interface (). Through calculation on discrete signals sent from the digitizer (), the CPU () converts an analyzed Rayleigh frequency shift signal obtained as the DTSS signal, to phase error, and corrects an analyzed phase signal obtained as the DAS signal, by the phase error.