A nonlinear ZBLAN-based photonic crystal fiber with ultra-high birefringence and flattened dispersion in short-wavelength infrared region

兹布兰 材料科学 双折射 色散(光学) 光子晶体光纤 光电子学 红外线的 光学 波长 零色散波长 色散位移光纤 纤维 光纤传感器 光纤激光器 物理 复合材料
作者
Shuyang Xie,Jingmin Zhou,Chen Nie,Piaorong Xu,Yuanyuan Liu,Lin Li,Jun Yi,Exian Liu
出处
期刊:Photonics and Nanostructures: Fundamentals and Applications [Elsevier BV]
卷期号:52: 101068-101068 被引量:2
标识
DOI:10.1016/j.photonics.2022.101068
摘要

In this paper, a high nonlinear ZBLAN-based photonic crystal fiber (PCF) with ultra-high birefringence and flattened dispersion is numerically proposed in short-wavelength infrared region based on finite element method. Eight elliptical-hole arrays are arranged surrounding the fiber core to separate x -polarized and y -polarized fundamental modes. The birefringence can reach to an excellent level of 4.46 ×10 -2 at wavelength 2.5 μm and interestingly shows a hopping phenomenon as the ellipticity increases from 2.2 to 3.1. In addition, the design also exhibits a single-mode propagation, short beat length (< 0.12 μm), high nonlinear coefficient 131 W -1 ·km -1 , low confinement loss 10 -9 dB/m and flattened dispersion with a maximum fluctuation 50 ps·km -1 nm -1 in wavelength range from 1.5 μm to 2.5 μm. The effect of the structure parameters (air hole diameter, lattice constant and ellipticity of elliptical holes) on the optical properties is symmetrically investigated. This ZBLAN-based PCF has great potential in the nonlinear applications of fiber laser and supercontinuum generation in infrared region. • A high nonlinear ZBLAN-based photonic crystal fiber with ultra-high birefringence is numerically proposed in short-wavelength infrared region. • This design also exhibits a short beat length, low confinement loss and flattened dispersion simultaneously. • The effects of the structure parameters on the optical properties are symmetrically investigated.
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