Optical fiber pH sensor based on a multimode interference device with polymer overlay

被引：2
|
作者：
Velasco-Bolom, P. M. [1 ]
Camas-Anzueto, J. L. [1 ]
Lopez-Cortes, D. [2 ]
Avendano-Roque, A. J. [2 ]
Ruiz-Perez, V. I. [2 ]
机构：
[1] Tecnol Nacl Mexico, Optomechatron Grp, Campus Tuxtla Gutierrez,Carretera Panamer Km 1080, Tuxtla Gutierrez 29050, Mexico
[2] Univ Autonoma Chiapas, Fac Ciencias Fis & Matemat, Carretera Emiliano Zapata Km 8, Tuxtla Gutierrez 29050, Chiapas, Mexico
来源：
APPLIED OPTICS | 2023年 / 62卷 / 14期
关键词：
BEHAVIOR;
D O I：
10.1364/AO.485139
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
An optical fiber pH sensor based on a multimode interference structure is presented. The sensitive element is a piece of no-core fiber (NCF) coated with a mixture of polyallylamine hydrochloride and polyacrylic acid by a modified layer-by-layer (LbL) self-assembly method. It is experimentally shown that by reducing the diameter of the NCF by chemical etching, the sensitivity is increased from -0.31 nm/pH to -2 nm/pH. The sensor exhibits a high linear response of 0.997 over a pH range from 5 to 11.3 with a rapid response time lower than 1 s. (c) 2023 Optica Publishing Group
引用
收藏
页码：3637 / 3642
页数：6
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