纤维集成式光流控传感器

In-Fiber Integrated Optofluidic Sensors

纤维集成光学可方便地实现器件的光耦合,显著提高光流控器件的集成度,在光流控器件领域有重要的潜在应用价值.微结构光纤具有μm量级的孔道结构,容纳气体/液体的体积可低至μL(nL)量级,是痕量检测的理想载体.这种一维孔道结构为样品与光波导提供了长程作用场所,突破了传统光纤光学的局限,在分析检测研究领域显示了无可替代的优势.以空心双芯光纤及悬挂芯光纤为例,介绍几种纤维集成式光纤内光流控器件,通过折射率、气压、化学发光、荧光检测以及在线电泳分离检测的几个简单模型,说明了基于特种光纤的"纤内"微流检测结构及功能的实现。

In-fiber integrated optics has important prospects in optofluidic device applications as it can realize convenient optical coupling and increase the integration level of the devices.Microstructured optical fibers have microholes with diameters in the micrometer scale,and contain gas or liquid with volumes in the scale of microlitre or nanoliter.Therefore,these fibers are desired carriers in trace detection.The one-dimensional holy structure provides a long cell for the contraction between samples and waveguide,breaking the limitation of traditional optical fiber optics and having irreplaceable advantages in the field of detection and analysis.This paper introduces a series of optical in-fiber integrated optofluidic devices based on special designed optical fibers such as twin-core fiber and suspended-core fiber.Some simple prototypes are described to show the realization of the structures and functions of in-fiber detection.These include detection of refractive index,gas pressure,chemiluminiscence and fluorescence,and also include electrophoresis separation and detection.