文献类型：期刊文献

英文题名：Highly Sensitive Detection Ammonia in Water by a Fabry-Perot Interferometer Based on Sparse Sampling and Vernier Effect

作者：Li, Yitong[1];Yang, Yuqiang[2];Huang, Zhihao[3];Wang, Ji[3,4];Mu, Xiaoguang[5];Mo, Chengyu[3];Lu, Qingjie

机构：[1]Guangdong Ocean Univ, Marine Sci, Zhanjiang, Peoples R China;[2]Guangdong Ocean Univ, Sch Elect & Informat Engn, Zhanjiang, Peoples R China;[3]Guangdong Ocean Univ, Elect & Informat Engn, Zhanjiang, Peoples R China;[4]Guangdong Ocean Univ, Sch Informat, Zhanjiang, Peoples R China;[5]Guangdong Ocean Univ, Sch Mech & Power Engn, Zhanjiang, Peoples R China

年份：2025

卷号：25

期号：2

起止页码：2682

外文期刊名：IEEE SENSORS JOURNAL

收录：SCI-EXPANDED(收录号：WOS:001444082800021)、、WOS

基金：This work was supported in part by the National Natural Science Foundation of China under Grant 62401162; in part by the Natural Science Foundation of Guangdong Province, China, under Grant 2023A1515011212 and Grant 2022A1515011603; in part by the Basic and Applied Basic Research Foundation of Guangdong Province under Grant 2023A1515110770; in part by the Special Projects in Key Fields of Ordinary Universities in Guangdong Province, China, under Grant 2021ZDZX1015; in part by the Natural Science Foundation of Shenzhen City, China, under Grant JCYJ20220530162200001 and Grant JCYJ20210324122813036; in part by the Program for Scientific Research Start-Up Funds of Guangdong Ocean University under Grant 060302112009; in part by the Scope of Zhanjiang City Unfunded Science and Technology under Project 2024B01047; and in part by Guangdong Ocean University Postgraduate Excellent Thesis Cultivation under Project 202401. The associate editor coordinating the review of this article and approving it for publication was Dr. Anand M. Shrivastav.

语种：英文

外文关键词：Optical interferometry; Sensors; Ammonia; Sensitivity; Optical refraction; Optical fiber sensors; Optical reflection; Optical variables control; Optical fibers; Interference; Ammonia concentration detection; Fabry-Perot interferometer (FPI); sparse sampling; Vernier effect

外文摘要：For interferometric fiber optic sensors, a method based on sparse sampling to control the sensitivity is proposed and applied to the ammonia measurement in water detected by a Fabry-Perot interferometer (FPI). The designed ammonia sensing interferometer (S-FPI) is fabricated by offset splicing of single-mode optical fibers (SMFs) to form an open cavity, which is filled with ammonia-sensitive oxazine perchlorate (O17). Based on the reaction of O17 with ammonia solution, the refractive index in the cavity is changed, which causes a shift in the interference spectrum of the S-FPI to measure the ammonia concentration. In order to improve the sensitivity of ammonia measurement, the sampling interval of the laser source is controlled to generate the Vernier effect, and the sensitivity of ammonia detection was enhanced by measuring the shift of the sampling-fitted Vernier envelope. Experiments achieved multiple controllable ammonia sensitivities with a maximum sensitivity enhancement of about 16.1 times, verifying the feasibility of this enhanced-sensitivity method. The method does not require the introduction of additional reference interferometer and spectral analyzers, greatly simplifying the sensing system structure. In addition, the sensitivity can be controlled and improved, which has a better application prospect.