公开(公告)号：US20210356357A1

公开(公告)日：2021-11-18

申请号：US17280971

申请日：2019-09-18

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Keiji OKAMOTO ,  Atsushi NAKAMURA ,  Hiroyuki OSHIDA

IPC: G01M11/00 ,  H01S3/091 ,  H01S3/30 ,  H04B10/071

Abstract: The present invention is to provide a backscattered light amplification device, an optical pulse test apparatus, a backscattered light amplification method, and an optical pulse test method for amplifying a desired propagation mode of Rayleigh backscattered light with a desired gain by stimulated Raman scattering in a fiber under test having the plurality of propagation modes. The backscattered light amplification device according to the present invention is configured to control individually power, incident timing, and pulse width of a pump pulse for each propagation mode when the pump pulse is incident in a plurality of propagation modes after the probe pulse is input to the fiber under test in any propagation mode.