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首页> 外文会议>Conference on Smart Sensor Technology and Measurement Systems; 20040315-20040317; San Diego,CA; US >Simultaneous distributed Brillouin strain and temperature sensor with photonic crystal fiber
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Simultaneous distributed Brillouin strain and temperature sensor with photonic crystal fiber

机译：光子晶体光纤同时分布的布里渊应变和温度传感器

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摘要

The strain and temperature dependence of the Brillouin loss spectra using Brillouin frequencies in a photonic crystal fiber with a partially Ge-doped core are studied for the first time. The spectrum of the photonic crystal fiber displays a multi-peak structure due to waveguide and antiwaveguide types of sound propagation. Our experiments demonstrate that the Brillouin frequency shift V_B depends on strain and temperature of the photonic crystal fiber. For two main peaks that are attributed to the scattering from longitudinal acoustic waves in the Ge-doped center region and solid pure silica region of the core of the photonic crystal fiber, the strain coefficients are 0.048 and 0.055 MHz/με and temperature coefficients are 0.96 and 1.25 MHz/℃ at wavelength of 1320 nm. Combining the measurements of the strain dependence of Brillouin frequency shift with measurements of the temperature dependence of Brillouin frequency shift, we demonstrate a simultaneously distributed strain and temperature sensor with a spatial resolution of 15 cm, a temperature resolution of 1.3℃, and a strain resolution of 15 με along a single photonic crystal fiber.
机译：首次研究了具有部分锗掺杂核的光子晶体光纤中使用布里渊频率的布里渊损耗谱的应变和温度依赖性。由于波导和反波导类型的声音传播，光子晶体光纤的频谱显示出多峰结构。我们的实验表明布里渊频移V_B取决于光子晶体光纤的应变和温度。对于归因于光子晶体光纤纤芯的Ge掺杂中心区域和固体纯二氧化硅区域中的纵向声波散射的两个主峰，应变系数为0.048和0.055 MHz /με，温度系数为0.96在1320 nm波长下为1.25 MHz /℃。结合布里渊频移的应变相关性测量与布里渊频移的温度相关性测量，我们展示了同时分布的应变和温度传感器，其空间分辨率为15 cm，温度分辨率为1.3℃，应变分辨率沿单条光子晶体光纤的15με。

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