[WC1] Distributed Fiber Sensing and Application

10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)

[WC1-5] Optimal Order of Pulse Sequence in Frequency Division Multiplexed Distributed Acoustic Sensor

○Jiazhen Ji¹, Jiageng Chen¹, Zhengyuan Xiao¹, Zhengwen Li¹, Jingdong Zhang², Shengwen Feng², Feng Li², Zuyuan He¹ (¹Shanghai Jiao Tong Univ., ²Huawei Technologies Company, Ltd.)

Keywords:

Distributed fiber optical sensing,fibers and fiber devices for sensing

We change the custom frequency ascending pulse sequence in FDM-φ-OTDR to an odd-early-even-late order. Strain resolution is improved from 21.3 pε/√Hz to 14.6 pε/√Hz in an 8-FDM-φ-OTDR with 50 km fiber due to crosstalk mitigation.