Dynamic distributed Brillouin sensing based on pump frequency-agile quadrupling modulation

被引：0

作者：

Bai, Xueqian ^{[1
]}

Wang, Wenrui ^{[1
,2
]}

Zhou, Biying ^{[1
]}

Hu, Jun ^{[1
]}

Wang, Ruoqi ^{[1
]}

Ye, Lingyun ^{[1
,2
]}

Song, Kaichen ^{[1
,2
]}

机构：

[1] Zhejiang Univ, Hangzhou 310027, Peoples R China

[2] Huanjiang Lab, Zhuji 311800, Peoples R China

来源：

OPTICAL FIBER TECHNOLOGY | 2024年 / 88卷

关键词：

distributed Brillouin optical fiber sensor; Dynamic measurement; Frequency-agility; Strain measurement; STRAIN-MEASUREMENT; FIBER SENSOR; BOTDA;

D O I：

10.1016/j.yofte.2024.103979

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We propose a dynamic distributed Brillouin sensing based on a frequency-agile quadrupling method. A common low-bandwidth direct digital frequency synthesizer (DDS) is employed to generate a few hundred MHz of frequency-agile pump pulses for Brillouin gain spectrum (BGS) scanning, and polarization multiplexing technology is utilized to further decrease the bandwidth requirement for the frequency-agile microwave signal to one-quarter. This method has low requirements for electronic devices and significantly reduces costs in systems. Static and dynamic measurement capabilities of 2 km fiber were demonstrated experimentally, the vibration frequencies of 183 Hz were measured with a sampling rate of 400 Sa/s.

引用

页数：7

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