Mizuno Yosuke, Zou Weiwen, He Zuyuan, Hotate Kazuo
Department of Electronic Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Opt Express. 2008 Aug 4;16(16):12148-53. doi: 10.1364/oe.16.012148.
We propose a Brillouin optical correlation-domain reflectometry (BOCDR), which can measure the distribution of strain and/or temperature along an optical fiber from a single end, by detecting spontaneous Brillouin scattering with controlling the interference of continuous lightwaves. In a pulse-based conventional Brillouin optical time-domain reflectometry (BOTDR), it is difficult in principle to achieve a spatial resolution less than 1 m, and the measurement time is as long as 5-10 minutes. On the contrary, the continuous-wave-based BOCDR can exceed the limit of 1-m resolution, and realize much faster measurement and random access to measuring positions. Spatial resolution of 40 cm was experimentally demonstrated with sampling rate of 50 Hz.
我们提出了一种布里渊光相关域反射仪（BOCDR），它可以通过控制连续光波的干涉来检测自发布里渊散射，从而从光纤的一端测量沿光纤的应变和/或温度分布。在基于脉冲的传统布里渊光时域反射仪（BOTDR）中，原则上很难实现小于1米的空间分辨率，并且测量时间长达5至10分钟。相反，基于连续波的BOCDR可以突破1米分辨率的限制，并实现更快的测量以及对测量位置的随机访问。通过50 Hz的采样率，实验证明了其空间分辨率可达40厘米。
