Information and Communications Research Laboratories (ICL), Industrial Technology Research Institute (ITRI), Hsinchu 31040, Taiwan.
Sensors (Basel). 2012;12(1):481-8. doi: 10.3390/s120100481. Epub 2012 Jan 5.
In this investigation, we propose and experimentally demonstrate a method for measuring the refractive index (RI) of liquid organic chemicals. The scheme is based on a single-mode fiber (SMF) sensor and an optical time-domain reflectometer (OTDR). Here, due to the different reflectance (R) between the SMF and organic liquid chemicals, the reflected power level of the backscattering light (BSL) measured by the OTDR would be different. Therefore, we can measure the RI of chemical under test via the measured BSL level. The proposed RI sensor is simple and easy to manipulate, with stable detected signals, and has the potential to be a valuable tool for use in biological and chemical applications.
在本研究中，我们提出并实验证明了一种测量液体有机化学品折射率（RI）的方法。该方案基于单模光纤（SMF）传感器和光时域反射计（OTDR）。在这里，由于 SMF 和有机液体化学品之间的反射率（R）不同，OTDR 测量的背向散射光（BSL）的反射功率水平也会不同。因此，我们可以通过测量的 BSL 水平来测量被测化学物质的 RI。所提出的 RI 传感器简单易用，具有稳定的检测信号，有望成为生物和化学应用中的一种有价值的工具。
