Thermal-optic tuning cascaded double ring optical sensor based on wavelength interrogation  

作　　者：Yanlu Wang Zhiping Yang Mingyu Li Jian-Jun He Qiushun Li 王彦禄;杨志平;李明宇;何建军;李秋顺(Department of Optical Engineering,School of Opto-Electronic Engineering,Changchun University of Science and Technology,Changchun 130022,China;State Key Laboratory of Modern Optical Instrumentation,Centre for Integrated Optoelectronics,Department of Optical Engineering,Zhejiang University,Hangzhou 310027,China;Jinan GK Medtech Science and Technology Development Co.,Ltd.,Jinan 250000,China)

机构地区：[1]Department of Optical Engineering,School of Opto-Electronic Engineering,Changchun University of Science and Technology,Changchun 130022,China [2]State Key Laboratory of Modern Optical Instrumentation,Centre for Integrated Optoelectronics,Department of Optical Engineering,Zhejiang University,Hangzhou 310027,China [3]Jinan GK Medtech Science and Technology Development Co.,Ltd.,Jinan 250000,China

出　　处：《Chinese Optics Letters》2022年第1期49-53,共5页中国光学快报（英文版）

基　　金：supported by the National Key Research and Development Program of China (No. 2020YFC2004600);the National Natural Science Foundation of China (No. 62027825);the Research Foundation of the Education Department of Jilin province (No. JJKH20210822KJ)

摘　　要：Based on the Vernier effect of the cascaded double ring resonator(CDRR) sensor,a sensor consisting of a microfluidic control system,a sensing ring,and a reference ring with a micro-heater for thermal tuning is proposed in this paper.In wavelength interrogation,a broadband spectrometer or a large tunable range laser is not required.The shift of the output spectrum caused by the refractive index change of the sample is converted into the change of the electric power by the thermal tuning heater.Due to the Vernier effect,the sensitivity of the sensor is 20 times higher than that of the single ring.The spectral envelope of the thermal-optic tuning of the sensor was fitted by a Gaussian function in the wavelength range of8 nm.The experimental results showed that the sensitivity was 33.703 W/RIU,and the limit of detection was 1.34×10-5 RIU.

关 键 词：cascaded double ring optical resonators Vernier effect thermal-optic effect 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]