A Highly Sensitive pH Sensor Based on Tapered Single-Mode Optical Fiber by Calcium Alginate Hydrogel Operating at Dispersion Turning Point

被引：0
作者：
Liu, Xue [1 ]
Wei, Yalong [1 ]
Xu, Wenyan [2 ]
Zhao, Yujia [1 ]
Wu, Bing [1 ]
Shi, Jie [1 ]
Zhang, Guoyu [1 ]
Chen, Ankang [1 ]
Li, Jing [1 ]
Cui, Lugui [3 ]
Peng, Feng [1 ]
Yang, Jun [4 ,5 ]
机构：
[1] Univ Jinan, Sch Phys & Technol, Jinan 250022, Peoples R China
[2] Harbin Engn Univ, Qingdao Innovat & Dev Ctr, Qingdao 266500, Peoples R China
[3] Harbin Engn Univ, Coll Phys & Optoelect Engn, Harbin 150001, Peoples R China
[4] Univ Technol, Adv Inst Photon Technol, Sch Informat Engn Guangdong, Guangzhou 510006, Peoples R China
[5] Univ Technol, Guangdong Prov Key Lab Photon Informat Technol, Guangzhou 510006, Peoples R China
来源：
IEEE SENSORS JOURNAL | 2025年 / 25卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Sensors; Sensitivity; Optical fiber sensors; Hydrogels; Refractive index; Calcium; Optical fibers; Optical fiber dispersion; Monitoring; Biosensors; Calcium alginate hydrogel; dispersion turning point (DTP); optical fiber sensor; pH sensor; tapered single-mode optical fiber (SMF); DESIGN;
D O I：
10.1109/JSEN.2024.3502392
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A highly sensitive pH sensor based on a tapered single-mode optical fiber (SMF) working at the dispersion turning point (DTP) is proposed, with calcium alginate hydrogel coated on its surface. The tapered SMF is prepared using a two-step tapering method, and the pH sensor is fabricated by coating the surface of the tapered SMF with calcium alginate hydrogel. Experimental results demonstrate that within the pH range of 7.03-8.45, the sensor exhibits the highest sensitivity at the DTP, with a sensitivity of 115.6 nm/pH. Furthermore, this sensor boasts benefits, including excellent repeatability and rapid response time. Compared with other sensors, the proposed pH sensor demonstrates superior pH sensitivity, simple structure, and low cost, making it highly promising for applications in seawater monitoring and biomedical fields.
引用
收藏
页码：569 / 576
页数：8
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