光学学报, 2010, 30 (3): 782, 网络出版: 2010-03-11
微环谐振腔集成波导光延时线研究
Study on the Integrated Waveguide Optical Delay Line Based on Microring Resonators
集成光波导 光延时线 微环谐振腔 耦合系数 损耗因子 integrated optical waveguide optical delay line microring resonator coupling coefficient loss factor
摘要
从波导微环谐振腔的光场传输函数出发,推导出其延时响应函数,分析了微环波导损耗对其延时响应特性的影响,发现应用于光学相控阵天线系统的微环谐振腔光延时线必须工作于过耦合状态,即耦合系数κ与微环波导损耗因子γ应满足关系式κ>(1-γ)。以延时抖动品质因子ε为判据,建立了微环谐振腔光延时线的优化设计方法,获得了目标延时为0.6 ns,延时带宽为2 GHz,延时抖动品质因子小于1×10-3 ns2的四环级联波导微环谐振腔光延时线的优化结构参数。
Abstract
The delay time response function of the waveguide microring resonator is deduced from its optical-field transmission function. The influence of microring waveguide loss on the delay time characteristics is analyzed and the result shows that the microring resonator-based optical delay line applied in the optically controlled phased array antenna system should be at over-coupled condition,which means that the coupling coefficient κ and the microring waveguide loss factor γshould satisfy the relation of κ>(1-γ). According to the criterion of delay time ripple guality factor ε,the method of optimized design of the microring resonator-based optical delay line is established,and the optimized structural parameters of cascaded four microring resonators for target delay time of 0.6 ns,bandwith of 2 GHz,and delay time ripple guality factor less than 1×10-3 ns2 are obtained.
韩秀友, 宋红妍, 张佳宁, 吴彭生, 滕婕, 王凌华, 赵明山. 微环谐振腔集成波导光延时线研究[J]. 光学学报, 2010, 30(3): 782. Han Xiuyou, Song Hongyan, Zhang Jianing, Wu Pengsheng, Teng Jie, Wang Linghua, Zhao Mingshan. Study on the Integrated Waveguide Optical Delay Line Based on Microring Resonators[J]. Acta Optica Sinica, 2010, 30(3): 782.