Institute of Photonics Technology, Jinan University, Guangzhou 510632, China.
Opt Lett. 2013 Sep 1;38(17):3283-6. doi: 10.1364/OL.38.003283.
We propose and demonstrate a highly sensitive in-line photonic crystal fiber (PCF) microfluidic refractometer. Ultrathin C-shaped fibers are spliced in-between the PCF and standard single-mode fibers. The C-shaped fibers provide openings for liquid to flow in and out of the PCF. Based on a Sagnac interferometer, the refractive index (RI) response of the device is investigated theoretically and experimentally. A high sensitivity of 6621 nm/RIU for liquid RI from 1.330 to 1.333 is achieved in the experiment, which agrees well with the theoretical analysis.
我们提出并演示了一种高灵敏度的在线光子晶体光纤（PCF）微流折射计。超薄 C 形光纤被拼接在 PCF 和标准单模光纤之间。C 形光纤为液体进出 PCF 提供了通道。基于萨格纳克干涉仪，从理论和实验两方面研究了器件的折射率（RI）响应。实验中，液体 RI 从 1.330 到 1.333 时，器件的灵敏度达到了 6621nm/RIU，与理论分析吻合较好。
