All-Optical Humidity Sensor Using SnO2 Nanoparticle Drop Coated on Straight Channel Optical Waveguide

Photonic Sensors

Yono Hadi Pramono¹  Nur Abdillah Siddiq¹  Melania Suweni Muntini¹  Asnawi Asnawi¹  Harith Ahmad²  Wu Yi Chong² 

[1] Department of Physics, Institut Teknologi Sepuluh Nopember;Photonics Research Centre, University of Malaya;

关键词: Humidity measurement;    SnO2 nanoparticle;    optical sensors;   

DOI  :  10.1007/s13320-019-0563-8

来源: DOAJ

【 摘 要 】

Abstract The straight channel optical waveguide coated with the SnO2 nanoparticle is studied as an all-optical humidity sensor. The proposed sensor shows that the transmission loss of the waveguide increases with increasing relative humidity (RH) from 56% to 90% with very good repeatability. The sensitivity to changes in relative humidity is ∼2 dB/% RH. The response time of the humidity sensor is 2.5 s, and the recovery time is 3.5 s. The response to humidity can be divided into 3 different regions, which are correlated to the degree of water adsorption in the SnO2 nanoparticle layer. Compared with the previous all-optical humidity sensor based on SnO2, the proposed sensor exhibits more rapid response, simpler fabrication process, and higher sensitivity. The proposed sensor has a potential application in the long distance, remote agriculture, and biological humidity sensing.

【 授权许可】

Unknown