Simulations of ultra-high sensitivity RI sensor in triple-core fiber with modified Vernier effect:Application in marine RI measurement

作     者：XIONG Lingyi YU Yangfei DUAN Shaoxiang LIU Bo LIN Wei YAO Yuan XIONG Lingyi;YU Yangfei;DUAN Shaoxiang;LIU Bo;LIN Wei;YAO Yuan

作者机构：Institute of Modern OpticsTianjin Key Laboratory of Optoelectronic Sensor and Sensing Network TechnologyNankai UniversityTianjin 300350China Marine Protected Area Administration of Sansha CitySansha 573100China Southern Marine Science and Engineering Guangdong LaboratoryZhuhai 519000China 

出 版 物：《Optoelectronics Letters》 (光电子快报（英文版）)

年 卷 期：2023年第19卷第8期

页      面：481-486页

核心收录：

学科分类：080202[工学-机械电子工程] 08[工学] 0816[工学-测绘科学与技术] 0802[工学-机械工程] 

基　　金：supported by the National Natural Science Foundation of China(Nos.11774181,62231005,62275131 and 62105164) the Natural Science Foundation of Tianjin(Nos.19JCYBJC16700,20JCQNJC01480,21JCQNJC00210 and 21JCYBJC00080) the Tianjin Graduate Research Innovation Project(No.2022BKY006) the Tianjin Development Program for Innovation and Entrepreneurship the Fundamental Research Funds for the Central Universities,Nankai University 

主　　题：interferometer fiber effect 

摘      要：We proposed an ultra-high sensitivity triple-core fiber refractive index(RI)sensor with a modified Vernier effect for marine RI measurement and demonstrated it by numerical *** sensor composes a pair of parallelized spatial mode Mach-Zehnder interferometers(MZIs),both of which are involved in sensing,but possess different interfering *** designing an MZI RI fiber optic sensor based on Vernier effect in air,it is demonstrated that in the low RI such as air environment,only the modes involved in sensing interference are affected by the environment to generate Vernier *** the high RI marine environment,both sensing interferometer and reference interferometer need to be affected by the ambient RI to generate Vernier *** simulation results indicate that the proposed novel sensing structure can amplify its sensitivity from-15428 nm/RIU to-24857 nm/RIU in the marine environment.