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| 光波导功分器的短缩优化设计方法研究 |
| Research on the optimized design method of shortening the optical waveguide splitter |
| 投稿时间：2015-02-25 |
| DOI：10.3969/j.issn.1005-5630.2015.06.015 |
| 中文关键词: 光波导技术 光波导功分器 短缩化设计 遗传算法 |
| 英文关键词:optical waveguide technology optical waveguide splitter shortening design genetic algorithm |
| 基金项目: |
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| 摘要点击次数: 2738 |
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| 中文摘要: |
| 提出并验证了一种针对光波导功分器短缩化的新的设计方法。在BPM软件仿真运行的基础上,归纳了单位圆心角弯曲损耗与曲率半径之间关系的仿真实验公式,建立了光波导功分器各级Y分支之间的单调弧形连接模型,确定了光波导分路器的长度、总的弯曲损耗、单口弯曲损耗以及均匀性的计算公式。综合考虑光波导功分器各参数间关系,采用了遗传算法全局优化技术,设计了合理可行的评价函数。通过对1×8石英光波导功分器的验证表明,与现行同类产品相比,插入损耗和均匀性指标持平,有效长度缩短了3.5 mm以上。 |
| 英文摘要: |
| The paper presents and experimentally verifies a new design method of shortening the optical waveguide splitter.Based on the use of BPM simulation, we summarize the relationship between unit central angle and the curvature radius of the bend loss, establishing the monotone arc connection model about all levels between the Y branch of the optical waveguide splitter. We determine the calculation formula about the optical waveguide splitter length, total bending loss, single bend loss and uniformity. In consideration of the whole length of waveguide, bending loss and uniformity, we introduce the design technique of genetic algorithm for global optimization, designing the reasonable and feasible evaluation function. We choose the initial numerical range of the genetic function, and study the genetic algorithm by using MATLAB. Through the verified design on an 1×8 quartz optical waveguide splitter, we find that insertion loss and uniformity index are equivalent,and the effective length is shorten 3.5 mm or more, compared with the existing similar products. |
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