Ultrahigh Birefringent Nonlinear Slot Silicon Microfiber With Low Dispersion

Abstract

A new simple structure of ultrahigh birefringent and ultrahigh nonlinear slot silicon microfiber with highly efficient dispersion reduction is proposed and numerical simulated using the full-vector finite element method with anisotropic perfectly matched layers. Benefiting from the slot effect induced sub-wavelength mode confinement, ultrahigh birefringence up to the order of 10 -1 can be realized within a wide wavelength range from 1.4 to 1.7 μm, which is comparable with the results in these ultrahigh birefringent photonic crystal fibers, but can't be achieved in traditional microfibers. Meanwhile, the nonlinear coefficients of quasi-TE mode and quasi-TM mode at the wavelength of 1.55 μm are as high as 969.58 W -1 m -1 and 156.74 W -1 m -1 , respectively. Furthermore, the dispersion value of quasi-TE mode at 1.55 μm can be decreased from 1.2358×10 3 ps/(nm.km) to 0 ps/(nm.km) simply by modifying the slot size. Owing to its excellent performance, the proposed slot silicon microfiber will have great potential for polarization maintaining nonlinear signal processing applications. IndexTerms-Birefringence, nonlinearity, chromatic dispersion, slot effect, microfiber.

Anomalous birefringence and nonlinearity enhancement of As2S3 and As2S5 filled D-shape fiber for optical communication

“…In addition, Yang et al [23] were designed a PCF that provided better optical characteristics like maximum nonlinearity of 68 W −1 km −1 , confinement loss of 10 −4 dB/m, and birefringence of 2.22×10 −2 . Furthermore, a nonlinear slot microfiber with the nonlinearity of 156.74 W −1 km −1 , high birefringence of 2.1×10 −2 , and negative dispersion of −1235.8 ps/(nm-km) was reported by Liao et al [24]. In 2018, a Ge 20 Sb 15 Se 65 -based hexagonal lattice PCF was proposed by Zhanqiang Hui et al [25] have been obtained the maximum nonlinearity, high birefringence, and beat length up to 3726 W −1 km −1 , 0.1513, and 33.04 respectively.…”