Bolognini Gabriele, Soto Marcelo A
Scuola Superiore Sant'Anna, via G. Moruzzi 1, 56124 Pisa, Italy.
Opt Express. 2010 Apr 12;18(8):8459-65. doi: 10.1364/OE.18.008459.
We demonstrate simultaneous strain and temperature sensing based on hybrid Raman and Brillouin scattering with enhanced performance thanks to the combined use of standard Fabry-Perot lasers in conjunction with optical pulse coding techniques. The combination of both techniques allows for an improvement of ~8.7 dB in temperature resolution and ~3 dB in strain resolution, with respect to standard distributed feedback lasers, as confirmed by experiments, resulting in a final temperature / strain resolution of ~0.27K / ~30microepsilon over 25-km sensing fiber range, avoiding the use of optical amplification and wavelength averaging techniques.
我们展示了基于混合拉曼和布里渊散射的同时应变和温度传感，由于结合使用标准法布里-珀罗激光器和光脉冲编码技术，其性能得到了增强。实验证实，与标准分布反馈激光器相比，这两种技术的结合使温度分辨率提高了约8.7 dB，应变分辨率提高了约3 dB，在25公里的传感光纤范围内最终实现了约0.27K /约30微应变的温度/应变分辨率，避免了使用光放大和波长平均技术。
