公开(公告)号：US11105659B2

公开(公告)日：2021-08-31

申请号：US16687692

申请日：2019-11-19

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Kwan Il Lee ,  Gukbeen Ryu ,  Sang Bae Lee ,  In Soo Kim ,  Wonsuk Lee

IPC: G01D5/353 ,  H01S5/00 ,  H01S5/12 ,  G02B27/28

Abstract: Embodiments relate to a dual Brillouin distributed optical fiber sensing system and a sensing method using Brillouin scattering that detects an event area in which an event occurred quickly by simultaneously measuring multiple correlation points located in an optical fiber under test by using a pump signal modulated with a pulsed gating signal and a continuous wave probe signal, and then precisely measures the corresponding event area by using the probe signal modulated with the pulsed gating signal and the pump signal.