Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 36,
  • Issue 4,
  • pp. 871-878
  • (2018)

Enhanced Coherent BOTDA System Without Trace Averaging

Not Accessible

Your library or personal account may give you access

Abstract

We propose and experimentally demonstrate a scheme of a coherent Brillouin time domain analysis (BOTDA) system without any trace averaging. Assisted by a commercial integrated coherent receiver with a local oscillator generated through single sideband modulation from the same laser source, the Brillouin signals carried on a stable intermediate frequency (IF) are extracted by electrical/digital filters and then recovered to baseband by digital signal processing. This increases the signal-to-noise ratio and avoids the need of trace averaging and enables real-time signal acquisition. To eliminate the Brillouin gain fluctuation, two adjacent Brillouin time-domain traces stimulated by two sequential orthogonal pump pulses are recovered after the IF signals are detected in a real-time manner. Based on this configuration, a spatial resolution of 4 m and Brillouin frequency shift uncertainty of 1.473 MHz are realized in distributed temperature sensing over 40.63 km range. With the nonlocal means algorithm and distributed Raman amplification integrated into the system, the BFS uncertainty is enhanced to 0.843 MHz and better spatial resolution of 2 m over the same sensing fiber is achieved.

© 2017 IEEE

PDF Article
More Like This
Averaging-free vector Brillouin optical time domain analyzer assisted by reference probe lightwave

Nan Guo, Xianting Zhang, Chao Jin, Zhiyong Zhao, Liang Wang, Hwa-Yaw Tam, and Chao Lu
Opt. Express 26(26) 33993-34001 (2018)

Single-measurement digital optical frequency comb based phase-detection Brillouin optical time domain analyzer

Chao Jin, Liang Wang, Yuli Chen, Nan Guo, Wenghong Chung, Hoyin Au, Zhaohui Li, Hwa-Yaw Tam, and Chao Lu
Opt. Express 25(8) 9213-9224 (2017)

Scanning-free BOTDA based on ultra-fine digital optical frequency comb

Chao Jin, Nan Guo, Yuanhua Feng, Liang Wang, Hao Liang, Jianping Li, Zhaohui Li, Changyuan Yu, and Chao Lu
Opt. Express 23(4) 5277-5284 (2015)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved