公开(公告)号：US20250123128A1

公开(公告)日：2025-04-17

申请号：US18891340

申请日：2024-09-20

Applicant: EXFO Inc.

Inventor： Vincent DEMERS-CARPENTIER ,  Eric THOMASSIN ,  Ines BAYOUDH EP BELGHITH ,  Rahma HAMMAMI

IPC: G01D5/353

Abstract: There is provided an OTDR method of assisting a user in finding a temporary event along an optical fiber link using an Optical Time Domain Reflectometer (OTDR). The method comprises: performing at least one OTDR acquisition toward the optical fiber link to obtain a baseline OTDR trace, wherein each OTDR acquisition is performed by propagating in the optical fiber link under test, a pulsed test signal and detecting corresponding return light from the optical fiber link so as to obtain an OTDR trace representing backscattered and reflected light as a function of distance in the optical fiber link; repeating OTDR acquisitions in real-time to obtain real-time OTDR traces; and for each new OTDR acquisition, comparing the corresponding real-time OTDR trace to the baseline OTDR trace to detect a temporary deformation of the OTDR trace using at least one of a difference between the baseline OTDR trace and the real-time OTDR trace and a derivative thereof, said temporary deformation being indicative of the presence of the temporary event along the optical fiber link.