Experimental Study on Near-IR Nonlinear Optical Waveguide Sensor for Refractive Index of Liquids

摘要

To determine the refractive index of liquids in near infrared(IR), a method is presented by measuring the output angle of the visible Cerenkov-radiation-mode when liquids are placed as the cover on a planar lithium niobate waveguide. The system configuration and the principle of the method are analyzed and some experimental results are given out. Both the experimental result and simulation show that this method is simple, rapid and of sufficient precision.