Zhou Biying, Wang Wenrui, Bai Xueqian, Hu Jun, Chen Bin, Ye Lingyun, Song Kaichen
Opt Lett. 2024 Feb 15;49(4):1057-1060. doi: 10.1364/OL.510910.
The white light interferometer is advantageous for wavelength division multiplexing (WDM), but the excessive noise floor limits its application in practicality. In this Letter, we propose a fiber-optic sensor driven by a broadband light source, which uses a fiber-optic Fabry-Perot cavity and a reference interferometer to enhance strain resolution. In the experiment, the strain resolution of a 5.86 m resonant sensor is 18.5 fɛ/ at 1.5 kHz, while the maximum detectable signal is over 230 rad at 1 kHz. With low cost, this method provides a new, to the best of our knowledge, solution for WDM sensing arrays with a large dynamic range.
白光干涉仪在波分复用（WDM）方面具有优势，但过高的本底噪声限制了其实际应用。在本信函中，我们提出了一种由宽带光源驱动的光纤传感器，该传感器利用光纤法布里 - 珀罗腔和参考干涉仪来提高应变分辨率。在实验中，一个5.86米的谐振传感器在1.5千赫兹时的应变分辨率为18.5微应变/ ，而在1千赫兹时最大可检测信号超过230弧度。该方法成本低，据我们所知，为具有大动态范围的波分复用传感阵列提供了一种新的解决方案。
