| 大角度蚀刻衍射光栅的模拟 |
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| 引用本文： | 盛钟延,娄丽芳,何赛灵,文泓桥,何建军.大角度蚀刻衍射光栅的模拟[J].光子学报,2003,32(5):546-549. |
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| 作者姓名： | 盛钟延 娄丽芳 何赛灵 文泓桥 何建军 |
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| 作者单位： | 浙江大学现代光学仪器国家重点实验室,光及电磁波研究中心,杭州,310027 |
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| 基金项目： | 浙江省科技计划重大项目 (项目号 0 0 110 10 2 7)，高等学校重点实验室访问学者基金项目 |
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| 摘 要： | 研究了平面波导密集波分复用器件中很有发展潜力的蚀刻衍射光栅(EDG).小角度范围光栅的模拟通常采用高斯近似的输入光场,由于近轴的高斯光场接近实际光场,所以模拟结果很准确.但这种方法应用于大角度范围的光栅则有偏差.本文提出了大角度蚀刻衍射光栅的模拟方法,分析了这种偏差并给出了模拟结果.事实上这种方法也适合于实际任意输入光场的模拟.
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| 关 键 词： | 蚀刻衍射光栅 平面波导 密集波分复用 Rowland圆 解复用器 |
| 收稿时间： | 2002/6/24 |
| 修稿时间： | 2002年6月24日 |
Simulation for an Etched Diffraction Grating(EDG) of Wide Angle |
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| Sheng Zhongyan,Lou Lifang,He Sailing,Wen Hongqiao,He JianjunState Key Lab of Modern Optical Instrument,Center for Optical and Electromagnetic Research,Zhejiang University,Hangzhou.Simulation for an Etched Diffraction Grating(EDG) of Wide Angle[J].Acta Photonica Sinica,2003,32(5):546-549. |
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| Authors: | Sheng Zhongyan Lou Lifang He Sailing Wen Hongqiao He JianjunState Key Lab of Modern Optical Instrument Center for Optical and Electromagnetic Research Zhejiang University Hangzhou |
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| Institution: | Sheng Zhongyan,Lou Lifang,He Sailing,Wen Hongqiao,He JianjunState Key Lab of Modern Optical Instrument,Center for Optical and Electromagnetic Research,Zhejiang University,Hangzhou 310027 |
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| Abstract: | As a key device in a DWDM system, an Etching Diffraction Grating (EDG) is a potential planar waveguide wavelength demultiplexer. For an EDG of narrow angle it is quite accurate to use a Gaussian field as the incident field in the simulation. However, the error increases when it’s applied to an EDG of wide angle. The simulation method based on a diffraction theory for an EDG of wide angle is presented. The errors are analyzed and the simulation results are given. The simulation method is also suitable for arbitrary incident field. |
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| Keywords: | Etched diffraction grating Planar waveguide Gauusian field Diffraction theory Phase error Rowland circle Dense wavelength division multiplexing |
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