Mach-Zehnder interferometer based fiber-optic nitrate sensor

被引：12
|
作者：
Al Noman, Abdullah [1 ]
Dash, Jitendra Narayan [2 ]
Cheng, Xin [2 ]
Tam, Hwa-Yam [2 ]
Yu, Changyuan [1 ]
机构：
[1] Hong Kong Polytech Univ, Photon Res Ctr, Dept Elect & Informat Engn, Hung Hom, 11 Yuk Choi Rd, Hong Kong, Peoples R China
[2] Hong Kong Polytech Univ, Photon Res Ctr, Dept Elect Engn, Hung Hom, 11 Yuk Choi Rd, Hong Kong, Peoples R China
来源：
OPTICS EXPRESS | 2022年 / 30卷 / 21期
关键词：
GRAPHENE;
D O I：
10.1364/OE.468944
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A biocompatible, reliable and quick responsive fiber-optic sensor based on Mach-Zehnder interferometer (MZI) is demonstrated for nitrate analytes tracing. The sensor was constructed by collapsing the air holes of a short length photonic crystal fiber (PCF) with the single-mode fibers (SMFs) on both ways. The proposed sensor has been coated with a graphene-PVA (polyvinyl alcohol) membrane using the thermal coating technique to make the sensor attractive to the nitrate ions in the aqueous solution. The maximum response is found to be 0.15 pm/ppm on the nitrate measurement scale of 0 ppm to 100 ppm with an average reaction time of similar to 10 s. Also, a short length of FBG (fiber Bragg grating) is implanted with SMF to improve the sensing accuracy of the presented sensor. (c) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
引用
收藏
页码：38966 / 38974
页数：9
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