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首页> 外文期刊>Optics Communications: A Journal Devoted to the Rapid Publication of Short Contributions in the Field of Optics and Interaction of Light with Matter >Design of single-polarization coupler based on dual-core photonic band-gap fiber implied in resonant fiber optic gyro
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Design of single-polarization coupler based on dual-core photonic band-gap fiber implied in resonant fiber optic gyro

机译：共振光纤陀螺中隐含双芯光子带隙光纤的单偏振耦合器设计

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摘要

A novel (to our knowledge) type of single-polarization (SP) coupler based on a dual-core photonic band gap fiber (PBF) is proposed. The effects of structure parameters on the performance of this coupler are studied numerically based on the full vector finite element method (FEM). Finally, an optimal design with a length of 0.377 mm at the wavelength of 1.55 mu m is achieved, and its implication in PBF-based fiber ring resonator (FRR), the effect of angular misalignment on the SP coupler are analyzed as well. When the SP coupler is incorporated into a PBF-based FRR, it functions as the power splitter and the polarizer simultaneously, and can extinct the secondary eigenstate of polarization (ESOP) propagating in the FRR. The mode field of SP coupler can match with the polarization-maintaining (PM) PBF with ultra-low temperature sensitivity proposed in previous study, and an all PM-PBF based FRR can be established, which is of great significance in suppressing the temperature-related polarization fluctuation and improving the long-term stability for RFOG, and the SP coupler has high angular misalignment tolerance as well. (C) 2016 Elsevier B.V. All rights reserved.
机译：提出了一种新颖的（据我们所知）基于双芯光子带隙光纤（PBF）的单偏振（SP）耦合器。基于全矢量有限元方法（FEM），数值研究了结构参数对该耦合器性能的影响。最后，实现了波长为1.55μm时长度为0.377 mm的最佳设计，并分析了其对基于PBF的光纤环形谐振器（FRR）的影响，以及角度失调对SP耦合器的影响。当将SP耦合器结合到基于PBF的FRR中时，它同时充当功率分配器和偏振器，并且可以消除在FRR中传播的第二偏振本征态（ESOP）。 SP耦合器的模场可以与先前研究中提出的具有超低温灵敏度的保偏PBF相匹配，并且可以建立基于PM-PBF的全FRR，这对于抑制温度耦合具有重要意义。 SPF耦合器也具有较高的角度失准容差，从而改善了RFOG的偏振波动并改善了RFOG的长期稳定性。 （C）2016 Elsevier B.V.保留所有权利。

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