Refractive index sensing properties of long-period fiber gratings at 2μm waveband

Wei Wang; Yunhe Zhao; Zuyao Liu; Mingxu Li; Yunqi Liu; Yongsheng Yang

doi:10.1117/12.2591106

28 February 2021 Refractive index sensing properties of long-period fiber gratings at 2μm waveband

Wei Wang, Yunhe Zhao, Zuyao Liu, Mingxu Li, Yunqi Liu, Yongsheng Yang

Proceedings Volume 11781, 4th Optics Young Scientist Summit (OYSS 2020); 1178104 (2021) https://doi.org/10.1117/12.2591106
Event: Optics Frontier: Optics Young Scientist Summit, 2020, Ningbo, China

Abstract

In this paper, we demonstrate the refractive index (RI) sensing properties of long-period fiber gratings (LPFGs) at 2 μm. The RI sensing properties of the resonant dips of LP₀₃, LP₀₄, LP₀₅, and LP₀₆ cladding modes operating at 2 μm have been studied, respectively. The sensitivity of resonant dip of LP06 mode operating at 2 μm could reach -670 nm/RIU and - 15483.9 nm/RIU in the RI region of 1.3500-1.4500 and 1.4500-1.4624, respectively, which is higher than that of the resonant dip of lower-order cladding modes. Furthermore, the RI sensitivity can be achieved higher with the longer resonance wavelength. The proposed LPFGs-based RI sensor has potential for the next generation optical fiber sensing systems.

Citation Download Citation

Wei Wang, Yunhe Zhao, Zuyao Liu, Mingxu Li, Yunqi Liu, and Yongsheng Yang "Refractive index sensing properties of long-period fiber gratings at 2μm waveband", Proc. SPIE 11781, 4th Optics Young Scientist Summit (OYSS 2020), 1178104 (28 February 2021); https://doi.org/10.1117/12.2591106

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