Guiding characteristics of sunflower-type fiber. (March 2018)

• Record Type: Journal Article
• Authors: Liu, Exian; Yan, Bei; Tan, Wei; Xie, Jianlan; Ge, Rui; Liu, Jianjun
• Is Part Of: Superlattices and microstructures. Volume 115(2018)
• Page Start: 123
• Page End: 129
• Publication Date: 2018-03
• Subjects: Sunflower-type fiber -- Guiding characteristic -- Rotational symmetry; Superlattices as materials -- Periodicals; Microstructure -- Periodicals; Semiconductors -- Periodicals; Superréseaux -- Périodiques; Microstructure (Physique) -- Périodiques; Semiconducteurs -- Périodiques; 621.38152
• DOI: 10.1016/j.spmi.2018.01.014
• Languages: English
• ISSNs: 0749-6036

Abstract

Abstract: In this paper, the guiding characteristics of sunflower-type fiber (SFF) with 6-fold rotational symmetry are investigated theoretically using finite element method (FEM). The behavior of single-mode propagation in SFF is verified. Numerical results reveal that, the cutoff ratio for endlessly single-mode propagation in SFF is 0.575 which is larger than that of photonic crystal fiber (PCF) and photonic quasi-crystal fiber (PQF). Moreover, SFF can present ultra-flattened near-zero chromatic dispersion, 0.249 ± 1.146 ps/nm/km, in a broadband of wavelength covering 1.20–1.84 μm over all the telecommunication wavelengths. In term of chromatic dispersion and confinement loss in the wavelength range from 1.00 to 2.00 μm, a comparison between SFF, PCF and PQF with same structure parameters is carried out. Importantly, the rotational symmetry, as a new manageable structure parameter beyond common air hole diameter and lattice constant, can be employed to manipulate the chromatic dispersion, confinement loss, effective mode area and non-linear coefficient and it dependences on these guiding characteristics are discussed in detail. Highlights: The cutoff ratio for endlessly single mode propagation in SFF is verified. SFF exhibits an ultra-flattened near-zero dispersion in a broadband of wavelength from 1.20 to 1.84 μm. A comparison between SFF, PCF and PQF is performed with respect to dispersion and confinement loss. Manipulating rotational symmetry provides a new method of optimizing the performance of SFF.