Sensitivity-enhanced strain sensor based on a shape-modulated multimode fiber

Zhiyuan Zhao, Xinruo Li, Shihao Yan, Ke Tian, Xin Wang, Haiyan Zhao, Elfed Lewis, Gerald Farrell, Pengfei Wang

Research output: Contribution to journalLetterpeer-review

Abstract

In this Letter, we demonstrate a sensitivity-enhanced strain sensor based on a shape-modulated multimode fiber (MMF). In contrast to conventional single-mode-multimode-singlemode (SMS) fiber structures, which typically contain a single cylindrical homogeneous MMF section, the shape of the MMFsection in this investigation is modulated by lateral offset splicing of multiple MMF segments. Simulation results show that the designed shape-modulated MMF has a higher peak mechanical strain than that of a cylindrical MMF. Experimental results demonstrate that the strain sensitivity achieved by the shaped-modulated MMF-formed SMS fiber structure is as high as -55.63 pm/μϵ, which is 33 times higher than that for a cylindricalMMF-formed conventional SMS fiber structure at -1.65 pm/μϵ. This high sensitivity and low-fabrication cost SMS fiber sensor has the potential to be a promising candidate in precise strain measurement applications.

Original languageEnglish
Pages (from-to)1329-1332
Number of pages4
JournalOptics Letters
Volume49
Issue number5
DOIs
Publication statusPublished - 1 Mar 2024

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