Acta Optica Sinica, Volume. 39, Issue 9, 0906006(2019)
Design of Three Vortex Photonic Crystal Fibers
In order to study the transmission characteristics of vortex beams in a photonic crystal fiber (PCF), we propose three different vortex PCFs, i.e., triangular lattice ring photonic crystal fiber (TLPCF), inverse-parabolic graded-index profile photonic crystal fiber (IPGIF), and sixfold photonic quasi-crystal fiber (SPQCF). By using the vector finite element method, we analyze the transmission characteristics of vortex modes in three PCFs. The results indicate that the effective refractive index difference between adjacent vector modes is larger than 10 -4, which is conducive to the transmission of vortex beams. The dispersion coefficient of TLPCF is the smallest, and that of SPQCF is the largest. Both of TLPCF and SPQCF can maintain the flat dispersion over a wide wavelength range (1400-1700 nm). The confinement losses of these three fibers are below 1×10 -7 dB·m -1, so that light can be confined in fiber core well. The nonlinear coefficients of the three different PCFs are in the order of 10 -3, and the stable transmission distances of the three different PCFs are longer than 1 km.
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Wei Wei, Lingxiang Zhang, Zhiming Zhang, Liqin Tang, Lei Ding, Yigang Li. Design of Three Vortex Photonic Crystal Fibers[J]. Acta Optica Sinica, 2019, 39(9): 0906006
Category: Fiber Optics and Optical Communications
Received: Mar. 15, 2019
Accepted: May. 21, 2019
Published Online: Sep. 9, 2019
The Author Email: Li Yigang (liyigang@nankai.edu.cn)