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Design of a single-polarization single-mode photonic crystal fiber double-core coupler |
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| Authors: | Jianfeng Li Kailiang Duan Xiangjie Cao Xiangdi Lin |
| Affiliation: | a School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China b Department of Physics, Institute of Nano Optics, Sichuan University, Chengdu 610064, China c Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China |
| Abstract: | A simple single-polarization single-mode (SPSM) photonic crystal fiber (PCF) coupler with two cores is introduced. The full-vector finite-element method (FEM) is applied to analyze the modal interference phenomenon of the even and odd modes of two orthogonal polarizations and the power propagation within the two cores. Meanwhile, the SPSM coupling wavelength range and its corresponding coupling length for different structure parameters are numerically analyzed. The numerical results show that SPSM coupling can be realized with a broad range of wavelength, and the coupling length can be of millimeter magnitude. Moreover, the SPSM coupling wavelength range and the coupling length can be optimized by designing proper mirco-structure parameters of the coupler. |
| Keywords: | 42.81 |
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