Increasing effective sensing points of Brillouin optical correlation domain analysis using four-wave-mixing process
Increasing effective sensing points of Brillouin optical correlation domain analysis using four-wave-mixing process
复制标题
DOI：
10.1117/12.2265682
复制
发表时间：
2017-04
期刊：
影响因子：
--
通讯作者：
Bin Wang;Xinyu Fan;Qingwen Liu;Zuyuan He
中科院分区：
文献类型：
--
作者：
Bin Wang;Xinyu Fan;Qingwen Liu;Zuyuan He
提出了一种利用简并四波混频（FWM）过程增加布里渊光学相关域分析（BOCDA）传感点的新方法。采用正弦调频光作为四波混频的泵浦源，产生的闲频具有较宽的调频范围。四波混频产生的惰轮用于BOCDA系统中，以增加BOCDA的传感点，因为传感点的数量与激光源的频率调制跨度成正比。我们实验证明了74 GHz的调制跨度，通过使用一阶闲频产生的四波混频过程中，这是最大的频率调制跨度在BOCDA系统中实现的，从1936年到3872 BOCDA的传感点增加了一倍。它提供了一种可能性，使用这种方法在国家的最先进的BOCDA系统，以实现数百万个有效的传感点。
We propose a novel method to increase sensing points of Brillouin optical correlation domain analysis (BOCDA) by utilizing degenerated four-wave-mixing (FWM) process. A sinusoidally frequency-modulated lightwave is used as the pump of FWM, and the generated idlers have a broadened frequency modulation span. The idlers produced by FWM are used in BOCDA system to increase the sensing points of BOCDA since the number is proportional to the frequency modulation span of the laser source. We experimentally demonstrate a modulation span of 74 GHz by using the first-order idler produced by FWM process, which is the largest frequency modulation span achieved in BOCDA system, doubling the sensing points of BOCDA from 1936 to 3872. It provides a possibility to use this method in the state-of-art BOCDA system to achieve several millions of effective sensing points.