论文部分内容阅读
通过分析非对称双芯光子晶体光纤耦合理论,提出了一种非对称双芯光子晶体光纤耦合器。理论分析显示,该耦合器的耦合比在一个较宽的波长范围内变化较小,具有波长响应平坦特性。通过有限元法模拟分析了该耦合器两芯间空气孔的尺寸以及光的偏振对其耦合特性的影响,结果表明,该非对称光子晶体光纤耦合器在1.3~1.8μm的波长范围内,其50%耦合比变化在±4%以内,具有较好的波长平坦耦合响应特性,适合光纤通信等领域对宽带耦合器的需求。
By analyzing the asymmetric two-core photonic crystal fiber coupling theory, an asymmetric two-core photonic crystal fiber coupler is proposed. Theoretical analysis shows that the coupling ratio of the coupler changes less in a wider wavelength range and has the characteristics of flattening wavelength response. The influence of the size of the air hole between the two cores of the coupler and the polarization of the light on the coupling characteristics of the coupler was simulated and analyzed by the finite element method. The results show that the asymmetric photonic crystal fiber coupler has a wavelength of 1.3-1.8μm, 50% coupling ratio within ± 4% change, with good wavelength flat coupling response characteristics, suitable for optical fiber communications and other areas of broadband coupler needs.