微流体光波导器件是一种基于微流体调控的新型光学功能器件，在生物医学和环境监测等领域中具有广阔的应用前景。介绍了微流体光波导器件的基本结构，分析了微流体光波导器件的工作原理，阐述了微流体光波导器件的研究现状，并指出了其发展趋势。

A novel tunable optical power splitter, with a Y-branch waveguide based on the total internal reflection and a microprism with tunable index refraction, is presented. Numerical simulation of its optical performance shows that a high dynamic range, low optical loss, and relatively low wavelength-dependence can be achieved. This component offers numerous advantages such as ease for fabrication, low cost, and compact size, which are very useful for potential application in integrated optical devices.