Qian Zhang, Ya-Hui Wang, Ming-Jiang Zhang, Jian-Zhong Zhang, Li-Jun Qiao, Tao Wang, Le Zhao. Distributed temperature measurement with millimeter-level high spatial resolution based on chaotic laser [J]. Acta Physica Sinica, 2019, 68(10): 104208-1
- Acta Physica Sinica
- Vol. 68, Issue 10, 104208-1 (2019)
Fig. 1. The characteristics of the chaotic light at two typical polarization matching states: (a1), (b1) Optical spectra; (a2), (b2) power spectra; (a3), (b3) autocorrelation curve两种典型偏振匹配态下混沌激光的特性 (a1), (b1) 光谱; (a2), (b2) 频谱; (a3), (b3)自相关曲线
Fig. 2. The experimental setup of broadband chaotic BOCDA基于宽线宽混沌激光BOCDA系统的实验装置图
Fig. 3. The BGS at different temperature end of FUT不同温度下待测光纤末端的布里渊增益谱
Fig. 4. The map of BFS distribution along the FUT: (a) Measured along the entire FUT; (b) the local enlargement near heated zone待测光纤沿线布里渊频移分布图 (a)整条光纤沿线的布里渊频移分布; (b)加热位置附近的局部放大图
Fig. 5. Measured distribution of the Brillouin frequency shift along the FUT待测光纤沿线布里渊频移分布曲线
Fig. 6. The setup of time-gated时间门控技术装置图
Fig. 7. The time series of the chaotic pump waves (red) and pulse amplitude-modulated (blue)脉冲调制前后泵浦光时序图
Fig. 8. The schematic diagram of SBS in the previous system (a) and the time-gated system (b)引入时间门控技术前(a)后(b)两路光在待测光纤中发生受激布里渊散射示意图
Fig. 9. The relationship of the Chaotic BGS with temperature: (a) Temperature-dependence of the BGS in the FUT; (b) that of the BFS in the chaotic BOCDA systems with (blue) and without (red) the time-gated scheme混沌布里渊增益谱和温度的关系 (a)待测光纤中随温度变化的布里渊增益谱; (b)加入时间门控技术前后待测光纤中随温度变化的布里渊频移量
Fig. 10. The map of BFS distribution along the FUT: (a) Measured along the entire FUT:(b) the local enlargement near heated zone待测光纤沿线布里渊频移分布图 (a)整条光纤沿线的布里渊频移分布; (b)加热位置附近的局部放大图
Fig. 11. Measured distribution of the Brillouin frequency shift along the FUT in the setup after optimization优化后系统中待测光纤沿线布里渊频移分布曲线
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