具有调制功能的多模干涉型1×3分束器  

Multimode Interference 1×3 Splitter Incorporated With Functions of Electroabsorption Modulator

作　　者：刘叶新[1] 陈晓文[1] 邢晓波[1] 吴添洪[1] 傅思镜[1] 文锦辉[1] 林位株[1] 

机构地区：[1]中山大学物理系光电材料与技术国家重点实验室,广州510275

出　　处：《光学学报》2005年第10期1406-1410,共5页Acta Optica Sinica

基　　金：国家自然科学基金(60178020;10274107);广东省自然科学基金(011204;2002B11601)资助课题

摘　　要：提出了利用量子约束斯塔克(Stark)效应制作具有调制功能的多模干涉型1×3分束器的设计思想,并详细分析了这种光分束器的工作原理。根据理论计算结果,制作了具有调制功能的多模干涉型1×3分束器。分束器的脊型多模波导长度为275μm,宽度为10μm,波导层采用GaAs/AlGaAs多量子阱结构,厚度约为0.2μm;电极采用共面波导结构。首先用有限差分光束传播法模拟了器件的光波传播特性,然后进行了初步的实验验证。理论模拟和实验结果表明,波长为0.86μm的高斯光束对称入射到多模波导的中心,器件实现了3分束功能;施加3 V的直流偏压,器件的调制深度达90%以上、调制带宽为2 GHz,实现了电吸收调制功能。Based on the quantum-confined Stark effect, a novel multimode interference 1×3 splitter incorporated with functions of electroabsorption modulator is proposed. The operating principle of the devices is analyzed in detail. On the basis of predefined ridge waveguide parameters which are length of 275 μm, width of 10 μm and thickness of 0.2 μm, a GaAs/AIGaAs multiple quantum well multimode interference 1 × 3 splitter is fabricated, coplanar waveguide structure is applied for electrode. The wave propagation characteristics of the splitter are numerically simulated by the finite difference beam propagation method and experimentally investigated. The static modulation characteristic of the device is also tested. When the applied direct current voltage is 3 V. Gauss beam with wavelength of 0.86μm is symmetrically incident to the center of multimode waveguide, electroabsorption modulation depth is upto 90 %, and bandwidth is 2 GHz.

关 键 词：多模干涉 量子约束斯塔克效应 导模传输分析 有限差分光束传播法 

分 类 号：TN814[电子电信—信息与通信工程]