Agarose coated micro-bottle sensor for relative humidity detection  

作　　者：Huda Adnan Zain Malathy Batumalay Md Ashadi Md Johari Kaharudin Dimyati Sulaiman Wadi Harun 

机构地区：[1]Department of Electrical Physics,University of Malaya,Kuala Lumpur 50603,Malaysia [2]Faculty of Information Technology,INTI International University,Nilai 71800,Malaysia [3]Faculty of Electrical and Electronic Engineering Technology,Universiti Teknikal Malaysia Melaka,Melaka 76100,Malaysia [4]Department of Physics,Faculty of Science and Technology,Airlangga University,Surabaya,Indonesia

出　　处：《Optoelectronics Letters》2021年第6期328-333,共6页光电子快报（英文版）

基　　金：the University of Malaya(No.IIRG005C-19IISS);INTI International University(No.INTI-FIT-03-2020)。

摘　　要：The whispering gallery mode(WGM)based micro-bottle resonator(MBR)sensor has been proposed and demonstrated for relative humidity measurement by using an agarose gel as a transducer.MBR was fabricated by using a soften-and-compress method to form a 190μm bulge bottle.The micro-bottle was optically excited by a 3μm tapered fiber and it exhibits a resonance with a Q factor in an order of 10^(5).The agarose coated MBR produces a good sensing response towards humidity with the sensitivity of 0.107 d B/%RH and linearity of 99.614%.The agarose hydrophilic nature and its changing porosity and refractive index with increasing relative humidity made the coated MBR structure to be more sensitive than the uncoated structure.This humidity sensor has a simple fabrication and is showing good sensitivity,linearity,resolution,response time and operational in a wide humidity range.

关 键 词：structure. humidity BOTTLE 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]