具有高双折射、大非线性和两个零色散的椭圆螺旋椭圆孔光子晶体光纤。

Elliptical-spiral elliptical-hole photonic crystal fiber with high birefringence, large nonlinearity, and two zero dispersion.

作者信息

Zhang Shanshan, Shi Weiguang, Zhang Cheng, Shi Jia, Wu Jixuan, Li Hongqiang, Liu Yange, Zhang Bo

出版信息

Appl Opt. 2020 Jan 10;59(2):521-529. doi: 10.1364/AO.378190.

Abstract

This paper presents a soft-glass (SF-57) elliptical-spiral photonic crystal fiber with elliptical air holes for achieving high birefringence, large nonlinearity, and tailoring two zero-dispersion wavelengths (ZDWs) in the near-infrared region. A full-vector finite-element method with perfectly matched boundary layer is used to characterize the properties of the photonic crystal fiber for different ellipticity ratios. The designed fiber has a birefringence 4 times higher than the circular-spiral structure. There are two ZDWs at around 1.2 µm and 2.8 µm which can be finely tuned depending on the ellipticity ratios along with a large nonlinearity. Due to the superior guiding properties, the proposed structure can be used for polarization control and broadband supercontinuum generation.

摘要

本文提出了一种具有椭圆形气孔的软玻璃（SF - 57）椭圆螺旋光子晶体光纤，用于在近红外区域实现高双折射、大非线性以及定制两个零色散波长（ZDW）。采用具有完美匹配边界层的全矢量有限元方法来表征不同椭圆率比下光子晶体光纤的特性。所设计的光纤双折射比圆形螺旋结构高4倍。在1.2 µm和2.8 µm左右有两个零色散波长，它们可根据椭圆率比进行微调，同时具有大非线性。由于其优异的导光特性，所提出的结构可用于偏振控制和宽带超连续谱产生。