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| 两介质波导的最小中心间距 | |
| 引用本文： | 汪明燕,孙一翎,张旭琳. 两介质波导的最小中心间距[J]. 光子学报, 2013, 42(3): 303-306. DOI: 10.3788/gzxb20134203.0303 |
| 作者姓名： | 汪明燕 孙一翎 张旭琳 |
| 作者单位： | 1. 丽水学院计算机与信息工程学院,浙江丽水,323000 2. 深圳大学电子科学与技术学院深圳市微纳光子信息技术重点实验室,广东深圳,518060 |
| 基金项目： | 国家自然科学基金青年基金(No. 61108053)和深圳市微纳光子信息技术重点实验室开放基金(No. MN201113)资助 |
| 摘 要： | 根据波导的耦合模理论,推导出两介质波导单位长度串扰的表达式,并在一定串扰的前提下,定义了两介质波导最小间距和最小中心间距,提出采用最小中心间距做为衡量波导集成度的参量.分析了波导尺寸及折射率差对最小间距、最小中心间距的影响.分析和模拟结果表明:折射率差越大,两波导最小间距、最小中心间距越小;在大折射率差的条件下,两波导最小间距可以降低到1 μm以下;在给定的工作波长、折射率分布的条件下,两介质波导的最小中心间距存在最小值. |
| 关 键 词： | 波导 最小中心间距 耦合模理论 集成光学 |
| 收稿时间： | 2012-06-25 |
| 修稿时间： | 2012-08-22 |
Minimum Center-to-center Separation of Two Dielectric Waveguides |
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| WANG Ming-yan , SUN Yi-ling , ZHANG Xu-lin. Minimum Center-to-center Separation of Two Dielectric Waveguides[J]. Acta Photonica Sinica, 2013, 42(3): 303-306. DOI: 10.3788/gzxb20134203.0303 | |
| Authors: | WANG Ming-yan SUN Yi-ling ZHANG Xu-lin |
| Affiliation: | 1. College of Computer and Information Engineering, Lishui University, Lishui, Zhejiang 323000, China; 2. Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, College of Electronic Science and Technology, Shenzhen University, Shenzhen, Guangdong 518060, China |
| Abstract: | Based on the coupled mode theory, analytical expression of crosstalk per unit length between two dielectric waveguides is derived. The minimum separation and center-to-center separation of two dielectric waveguides under certain crosstalk are defined. The minimum center-to-center separation serves as a measure of waveguide integration. The influences of waveguide size and refractive index difference on the minimum center-to-center separation are investigated. The analysis and simulation results indicate that strongly confined waveguides have small minimum separation and center-to-center separation. Under the condition of large refractive index difference, the minimum separation can be reduced to less than 1 μm. The minimum center-to-center separation has a minimum value for given wavelength and refractive index distribution. |
| Keywords: | Waveguide Minimum center-to-center separation Coupled mode theory Integrated optics |
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