大量程折射率仪的研究

Research on a large-range refractometer

利用亚毫米尺度对称金属包覆波导,提出了一种大量程折射率仪的工作原理,这种仪器可测量气体、液体和固体的折射率。原理上,只要待测介质对所用激光波长透明,折射率测量范围不受限制。通过对空气、纯水和LiNbO_3晶体的测量,结果表明仪器的测量精度小于3.0×10^(-3)。

Utilizing the millimeter-scale symmetrical metal-cladding optical waveguide,mechanism of a large-range refractometer is proposed,which is applicable to measure the refractive indexes of gas,liquid and solid.In principle,anything transparent can be measured since the detection range is not limited.The data presented,based on the experiments on air,pure water and LiNbO_3 crystal,show that the measurement precision is less than 3.0×10^（-3）.