一种微流控2×2光开关的性能研究

Study on Properties of A Microfluidic 2×2 Optical Switch

微流控光学是在微尺度上通过操控微流体达到调节系统光学特性的技术。微流控光开关在多个元件集成到单一微流控芯片并实现可重构的微流控光路中起重要作用。使用气动方式设计了一种光路可重构的2×2光开关。通过压缩气体驱动控制一个可调气隙反射镜的状态,使光在微流道内交替发生透射和全反射,实现光开关功能。通过在COMSOL软件中仿真分析,得出其消光比为10.2dB、开关周期可达到60ms。结果显示,该方法具有较好的开关性能。此开关可与其他器件集成,制作复杂的微流控器件以实现其他不同的功能。

Optofluidic is a technology that adjusts the optical properties of the system by manipulating microfluid. Microfluidic optical switch plays an important role in integrating multiple components into a unitary microfluidic chip and implementing a reconfigurable microfluidic optical path.In this paper,a pneumatically 2 × 2 optical switch with the reconfigurable optical path is designed.By compressing the gas to control the states of an adjustable air gap mirror,the optical switch function is realized by making light transmission and total reflection alternately in the microfluidic channel.Simulation results obtained with COMSOL software show that the extinction ratio is 10.2 dB and the switch period can reach up to 60 ms.It is demonstrated that this switch has good performance,and can be integrated with other models to manufacture complex microfluidic devices for various functions.