测量液体和气体折射率的集成光学技术单侧和双侧漏模法

A integrated optics technique for measuring the refractive indices of liquid and gas one and two-side leaky mode method

由单侧和双侧漏模法,测量了液体和气体的折射率,将液体或气体滴入或充入棱镜和衬底之间,使这三层介质组成单侧或双侧漏波导.用棱镜耦合器测量共振漏模的模折射率,并由相应的模方程确定液体或气体的折射率.测量结果表明,折射率的误差为1～3×10^(-4).并在理论上对测量精度作了分析和讨论.

The refractive indices of some liquid and gas were measured by using one and two-side leaky mode method. Liquid or gas wag driped or filled between prism and substrate, so that these three layers media formed one or two sides leaky weveguide. The mode refractive indices of resonant modes were measured by using the prism coupler, and the refractive index of the liquid or gas was determined from corresponding mode equations. Measure(?) results shown that errors of the refractive indices are with in 1-3×10-4. The measurement accuracies were analysed and discussed theoretically.