Department of Engineering Science, National Cheng Kung University, Tainan 70101, Taiwan.
Opt Lett. 2009 Aug 15;34(16):2408-10. doi: 10.1364/ol.34.002408.
We report a simple Fabry-Perot interferometer (FPI) embedded in a glass chip, which is capable of precisely measuring the refractive indices of liquid samples. The microdevice is the integration of a single-mode optical fiber and a microchannel in the photosensitive glass fabricated by femtosecond laser followed by thermal treatment, wet etching, and annealing. The function of the FPI is demonstrated by measuring the refractive indices of water and methanol. The interference visibility is more than 4.0 dB, which is sufficient for most sensing applications. This refractive index sensor with rigid structure could be further integrated to become a more complex 3D lab-on-a-chip for reliable biomedical applications.
我们报告了一种简单的法布里-珀罗干涉仪（FPI）嵌入玻璃芯片中，能够精确测量液体样品的折射率。该微器件是通过飞秒激光随后进行热、湿刻蚀和退火处理在光敏玻璃中集成单模光纤和微通道制成的。通过测量水和甲醇的折射率来演示 FPI 的功能。干涉可见度超过 4.0dB，足以满足大多数传感应用。这种具有刚性结构的折射率传感器可以进一步集成，成为更复杂的用于可靠生物医学应用的 3D 片上实验室。
