Voskoboinik Asher, Yilmaz Omer F, Willner Alan W, Tur Moshe
Department of Electrical Engineering-Systems, University of Southern California,3740 McClintock Avenue, EEB500, Los Angeles, California, 90089, USA.
Opt Express. 2011 Dec 12;19(26):B842-7. doi: 10.1364/OE.19.00B842.
A frequency-sweep-free method for distributed Brillouin sensing is proposed, having the potential for fast dynamic strain measurements. In this reported implementation of the method, multiple probe waves with carefully chosen optical frequencies simultaneously propagate in the fiber against an equal number of sequentially-launched, short pump pulses of matching frequencies, where each of pump-probe pair replaces one sweeping step in the classical BOTDA technique. Experimentally, distributed sensing is demonstrated with a spatial resolution of a few meters.
提出了一种用于分布式布里渊传感的无频率扫描方法，具有进行快速动态应变测量的潜力。在该方法的此次报道实施中，多个具有精心选择光频率的探测波同时在光纤中反向传播，以对抗相同数量的依次发射的、频率匹配的短泵浦脉冲，其中每对泵浦 - 探测波替代了经典布里渊光时域分析（BOTDA）技术中的一个扫描步骤。实验上，实现了空间分辨率为几米的分布式传感。
