| Geometry Parameter Optimization of Large Cross-Sectional S-Shaped Bent Rib Waveguides for Silicon Based Optical Switches |
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| 作者姓名： | 李智勇 刘敬伟 余金中 |
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| 作者单位： | State Key Laboratory, on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, DO Box 912, Beijing 100083 |
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| 基金项目： | Supported in part by the National Natural Science Foundation of China under Grant No 60577044, and the National Basic Research Programme of China under Grant No 2006CB302803. |
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| 摘 要： | By using a genetic algorithm, geometry parameters of large cross-sectional S-bend rib waveguides are optimized aiming at the least total loss when the propagation loss is considered. Optimized results axe presented as an example of S-bend rib waveguides based on silicon-on-insulator （SOI） 4 × 4 optical switches. The value of 2 dB/cm is given to the propagation loss according to the experimental results. The simulation results indicate that the total loss drops from 1.0002rib down to 0.4375dB without considering a lateral offset. If the offset is adopted, the total loss reduces from 0.5463dB to 0.2365dB. In addition, the effect of the rib height ratio on the loss is analysed, and the optimal ratio is obtained to be 0.55.
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| 关 键 词： | 几何学 参数 波导 硅元素 几何光学 |
| 收稿时间： | 2006-11-23 |
| 修稿时间： | 2006-11-23 |
Geometry Parameter Optimization of Large Cross-Sectional S-Shaped Bent Rib Waveguides for Silicon Based Optical Switches |
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| LI Zhi-Yong,LIU Jing-Wei,YU Jin-Zhong.Geometry Parameter Optimization of Large Cross-Sectional S-Shaped Bent Rib Waveguides for Silicon Based Optical Switches[J].Chinese Physics Letters,2007,24(3):744-746. |
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| Authors: | LI Zhi-Yong LIU Jing-Wei YU Jin-Zhong |
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| Institution: | State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences PO Box 912, Beijing 100083 |
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| Abstract: | By using a genetic algorithm, geometry parameters of large cross-sectional S-bend rib waveguides are optimized aiming at the least total loss when the propagation loss is considered. Optimized results are presented as an example of S-bend rib waveguides based on silicon-on-insulator (SOI) 4×4 optical switches. The value of 2dB/cm is given to the propagation loss according to the experimental results. The simulation results indicate that the total loss drops from 1.0002dB down to 0.4375dB without considering a lateral offset. If the offset is adopted, the total loss reduces from 0.5463dB to 0.2365dB. In addition, the effect of the rib height ratio on the loss is analysed, and the optimal ratio is obtained to be 0.55. |
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| Keywords: | 42 82 Et 42 82 Ds |
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