A fiber optic salinity measurement method based on the Fresnel principle

In order to measure the refractive index of the salt solution so that its salinity can be obtained,a measurement method with optical fiber based on the Fresnel principle was put forward.Its principle was introduced and the experimental results were obtained.The experiments indicated that the resolution was smaller than 0.4%.This method is simple,fast,sensitive and accurate.It can be applied in real-time monitoring of the seawater salinity.It also can be widely used in the field of industrial online concentration or refractive detection.