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 language | English |
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Pages (from-to) | 1329-1332 |
Number of pages | 4 |
Journal | Optics Letters |
Volume | 49 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1 Mar 2024 |