Journal
OPTICAL FIBER TECHNOLOGY
Volume 71, Issue -, Pages -Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.yofte.2022.102920
Keywords
Chemosensor; Cu(II) sensing; Schiff base; Tilted Fiber Bragg grating sensor; 80-?m diameter SMF
Funding
- Fundamental Research Grant Scheme (FRGS) , Ministry of Higher Education, Malaysia [FRGS/1/2020/STG04/IMU/03/2]
- Impact-Oriented Interdisciplinary Research Grant (IIRG) , University of Malaya [llRG028A-2019]
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A novel Schiff base functionalized tilted fiber Bragg grating (TFBG) is developed for the rapid detection of Copper ions in aqueous solutions. The proposed sensor offers higher sensitivity, a lower limit of detection, and less susceptibility to refractive index noise compared to conventional TFBGs.
A novel Schiff base functionalized tilted fiber Bragg grating (TFBG) is developed for the rapid detection of Copper ions in aqueous solutions. Notably, the proposed TFBG was inscribed in a commercial 80 mu m diameter singlemode fiber that has a stronger evanescent field and functionalized with Schiff base that has a strong affinity with copper(II) ions. The findings indicate that the 80-mu m TFBG is more superior to the TFBG inscribed in the 125-mu m diameter standard optical fiber in terms of higher sensitivity, a lower limit of detection, and less susceptibility to refractive index noise. Furthermore, the proposed sensor is a silica glass-based optical component that can be reused multiple times via chemical stripping followed by a functionalization process. The results show that there is no sign of alteration and degradation in its optical spectrum after 24 times of chemical stripping processes.
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