公开(公告)号：US20240283532A1

公开(公告)日：2024-08-22

申请号：US18392359

申请日：2023-12-21

Applicant: EXFO Inc.

Inventor： Gang HE ,  Gwennael AMICE

IPC: H04B10/077 ,  H04B10/079

CPC classification number: H04B10/0775 ,  H04B10/0795

Abstract: There are herein provided methods and systems to characterize optical propagation characteristics of an optical fiber communication link (such as, e.g., a submarine line system), including ASE noise (such as traditional OSNRASE), non-linear noise (such as OSNRNL due to nonlinear distortions) and/or the GOSNR. The method uses a polarized probe signal in the optical transmission channel under test in order to probe the link under test, as well as power loading light in other optical transmission channels in order to activate non-linear effects. The propagated test signal is then analyzed under varied polarization conditions using a varied-SOP polarization-resolved optical spectrum analysis of the propagated probe signal.