1. Design of a mid-infrared ultra-broadband chalcogenide Ge20Sb15Se65 -based single-polarization single-mode photonic crystal fiber with large nonlinearity.
- Author
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Hui, Zhanqiang, Wang, Xiaotong, Zhang, Youkun, Gong, Jiamin, Zhou, Hua, and Soliman, Abdel-Hamid
- Subjects
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SUPERCONTINUUM generation , *PHOTONIC crystal fibers , *FINITE difference time domain method , *NONLINEAR optics , *OPTICAL fibers , *FIBER optics - Abstract
This paper proposes a mid-infrared (mid-IR) Ge 20 Sb 15 Se 65 -based photonic crystal fiber (PCF) with hexagonally latticed dual-rhombic air holes to deliver single-polarization single-mode (SPSM) over a broad waveband. The properties of SPSM bandwidth, confinement loss, birefringence, effective mode area and nonlinear coefficient are investigated in 2 μm–7 μm region by utilizing the finite difference time domain method (FDTD) together with anisotropic perfectly matched layer (PML). The results reveal that for the optimized geometric parameters of Λ = 2.6 μm, D = 2.4 μm, d = 1.2 μm, D 1 = 2.2 μm, and d 1 = 0.4 μm, the proposed PCF is a low-loss SPSM-PCF within the wavelengths ranging from 4.0338 μm to 7 μm, where only the x -polarization mode exists with the highest nonlinearity coefficient of 1468 w−1 km-1 (at 4.0338 μm). It will become an outstanding candidate for mid-IR optical fiber sensing/detection/ imaging/monitoring and nonlinear fiber optics. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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