Non-intrusive refractometer sensor

Pramana

Pabitra Nath1 2¹ 

[1] Department of Electronics Science, Gauhati University, Guwahati 781 014, India$$

关键词: Fibre-optic sensor;    back-reflection;    refractometer;    non-intrusive refracto-meter.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

An experimental realization of a simple non-intrusive refractometer sensor is demonstrated in this communication. The working principle of the sensor is based on intensity modulation of the back-reflected light when output light from an optical fibre end focusses onto air–medium interface. The change in the refractive index of the medium affects the reflectance of the incident light signal and thus modulates the back-reflected signal. Refractive index variation as small as 0.002 RIU can be measured using the present technique. The advantages of the technique are its simplicity, cost efficiency and usefulness in monitoring refractive indices of acidic solutions.

【 授权许可】

Unknown