Jia Xin-Hong, Chang Han-Qing, Ao Lei, Ji Xiao-Ling, Xu Cong, Zhang Wei-Li
Opt Express. 2016 Jun 27;24(13):14079-85. doi: 10.1364/OE.24.014079.
A novel approach for long-distance sensing through Brillouin optical time-domain analysis (BOTDA) assisted by second-order distributed Brillouin amplification (DBA) was proposed and experimentally demonstrated. To the best of our knowledge, this is the first BOTDA study that used second-order DBA. Compared with BOTDA assisted by first-order DBA, the proposed approach enhanced the signal-to-noise ratio of the Brillouin trace by ~3 dB for a range featuring minimum sensing intensity. Long-distance sensing with ~5 m spatial resolution and ± 1.6°C measurement uncertainty over ~99 km fiber was successfully realized by employing high-efficiency pumping using ~6 dBm second-order and ~1.5 dBm first-order pumps.
提出了一种通过二阶分布式布里渊放大（DBA）辅助的布里渊光时域分析（BOTDA）进行长距离传感的新方法，并进行了实验验证。据我们所知，这是首次使用二阶DBA的BOTDA研究。与一阶DBA辅助的BOTDA相比，该方法在最低传感强度范围内将布里渊轨迹的信噪比提高了约3 dB。通过使用约6 dBm的二阶泵浦和约1.5 dBm的一阶泵浦进行高效泵浦，成功实现了在约99 km光纤上具有约5 m空间分辨率和±1.6°C测量不确定度的长距离传感。
