Etched and Nanocoated SMS Fiber Sensor for Detection of Salinity Concentration

Proceedings

Cardona-Maya, Y.¹ 

关键词: etching;    optic fibre sensor;    refractive index;    single-mode–multimode–single-mode (SMS);    thin-films;    salinity;   

DOI  :  10.3390/proceedings1040333

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

An optical fibre refractometer has been developed by etching and deposition of a thin film of indium tin oxide (ITO) on a single-mode-multimode-single-mode (SMS) fibre structure. The interference between modes in this structure is sensitive to the refractive index changes of the surrounding medium, achieving sensitivities of up to 7000 nm/RIU in the 1.333–1.338 RIU range. A salinity sensor has been implemented as a practical application of this proposed structure. Fast Fourier transform (FFT) analysis and tracking of an interference dip were used to monitor the interference between modes obtaining sensitivities of 0.99 nm/PSU and 0.025 rad/PSU, respectively.

【 授权许可】

CC BY