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一阶模的滤除及在Y分支和多模干涉结构中的应用 被引量：2

Filtering Out the First-Order Mode and Its Application in Y-Branch and Multimode Interferometric Structure
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摘要 Y分支和多模干涉结构广泛应用于平面光波导器件中 ,在这些器件中 ,Y分支和多模干涉结构输出对称性具有重要意义。引入Y分支和多模干涉结构输出的不对称主要原因是这两种结构中产生了一阶导模 ,设计一种新的耦合器结构 ,在这个结构中 ,两根单模波导分别放置在一根多模波导两边 ,并且单模波导的传播常量与多模波导的一阶模的传播常量相同 ,这种结构可以将一阶导模滤除。在Y分支和多模干涉结构中使用了这种结构 ,模拟结果表明 ,采用这种耦合器的Y分支和多模干涉结构具有非常好的输出对称性。 The Y-branch and multimode interferometric (MMI) structure are used in many kinds of planar lightwave circuits, and the symmetrical output of Y-branch or MMI structure takes important role in these apparates. The main factor that introduces asymmetry into the output of Y-branch or MMI structure is the first-order mode guided by them. A coupler in which the waveguides which can only guide the fundamental modes are located on both sides of the multimode waveguide is designed, and this coupler can filter out the first order mode guided by it. This coupler is used in Y-branch and MMI structure, and the simulation results show that the output of Y-branch and MMI structure with this coupler has better symmetry in comparison with traditional structure.
作者 王文敏 马卫东 陈光 胡国华 杨涛 许远忠
机构地区 武汉邮电科学研究院光迅科技有限责任公司
出处 《光学学报》 EI CAS CSCD 北大核心 2003年第11期1330-1334,共5页 Acta Optica Sinica
基金 国家高技术研究发展计划 (86 3)课题 (2 0 0 1AA312 0 2 0 ) 武汉市科技计划 (2 0 0 2 10 0 5 130 0 6 )资助课题
关键词 波导光学 平面光波导 多模干涉结构 Y分支 平面光波导器件 输出对称性 有效折射率 光谱响应 guided wave optics planar lightwave circuit Y-branch multimode interferometric structure output symmetry
分类号 TN252 [电子电信—物理电子学]
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共引文献25

同被引文献18

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引证文献2

二级引证文献12

光学学报
2003年 第11期

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