1 上海交通大学 区域光纤通信网与新型光纤通信系统国家重点实验室, 上海 200240
2 浙江工业大学 信息工程学院,杭州 310023
基于光子晶体单向传输波导,设计了一种三端口和两种四端口结构的通道下路滤波器.为取得100%的通道下路效率,运用实时耦合模理论对这三种结构进行了分析.理论分析表明该通道下路滤波器比利用光子晶体普通介质波导设计的通道下路滤波器具有更简单的结构,降低了器件制作难度.用有限元方法对滤波器结构进行了数值仿真分析,仿真计算结果表明所设计的三种结构具有超过90%的通道下路效率,与理论分析结果相符合.
集成光学 有限元方法 光子晶体 光子带隙 通道下路滤波 光子晶体单向波导 通道下路效率 耦合模理论 Optical communication Integrated optics Finite element method Photonic crystals Optical band gaps Channel drop filter Photonic crystal oneway waveguide Channel drop efficiency Coupled mode theory
Author Affiliations
Abstract
1 College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China
2 College of Computer Science and Technology, Zhejiang University of Technology, Hangzhou 310023, China
3 State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240, China
We design a compact triplexer based on two-dimensional (2D) hexagonal lattice photonic crystals (PCs). A folded directional coupler (FDC) is introduced in the triplexer beside the point-defect micro-cavities and line-defect waveguides. Because of the reflection feedback of the FDC, high channel drop efficiency can be realized and a compact size with the order of micrometers can be maintained. The proposed device is analyzed using the plane wave expansion method, and its transmission characteristics are calculated using the finite-difference time-domain method. The footprint of the triplexer is about 12×9 μm, and its extinction ratios are less than –20 dB for 1310 nm, approximately –20 dB for 1490 nm, and under –40 dB for 1550 nm, making it a potentially essential device in future fiber-to-the-home networks.
三重波分复用器 二维六角晶格光子晶体 折叠定向耦合器 250.5300 Photonic integrated circuits 230.5750 Resonators 230.7370 Waveguides Chinese Optics Letters
2011, 9(4): 042501
Author Affiliations
Abstract
1 Institute of Fiber Optic Communication and Information Engineering, College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China
2 State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240, China
A novel polarization channel drop filter (PCDF) based on two-dimensional (2D) photonic crystals (PCs) is presented. It consists of two line defect waveguides and two point defect micro-cavities. In the line-defect waveguides, the transverse-electric (TE) and transverse-magnetic (TM) polarization lights are guided using photonic band-gap and total internal reflection effect, respectively. The light at the resonant frequency for TE polarization can be transferred from one waveguide to the other using the proposed system. Compared with the existing four-port PCDF based on PCs, the three-port structure can realize a multi-channel wavelength system of PCDF more easily and can be an essential device in future polarization wavelength division multiplexing (PWDM) systems.
光子晶体 偏振通道下路滤波器 偏振波分复用系统 250.5300 Photonic integrated circuits 230.5750 Resonators 230.7370 Waveguides Chinese Optics Letters
2010, 8(8): 749
1 浙江大学信息与电子工程学院,杭州 310027
2 日本东京大学理学部物理系,日本东京
3 中国科学院长春物理研究所,长春 130021
研制了一种以铕钆络合物(Eu0.1Gd0.9)(TTA)3(TPPO)2为发光材料的新型有机电致发光器件,观察到了三重态的磷光发光现象,分析表明此电致磷光发光是Gd3+对络合物配体电子自旋轨道强烈扰动引起的三重态发光。同时用积分球方法测定了该器件在不同温度下的光致发光和电致发光效率,结果表明此磷光发光有效地提高了器件的电致发光效率。
电致发光 磷光 三重态 稀土络合物
1 浙江大学信息与电子工程学系,杭州 310027
2 日本金泽大学工学部,日本金泽
详细分析计算了 n路并行传感器系统的输出功率谱, 发现系统的噪声主要由激光器的随机位相噪声所决定。噪声级主要由激光相干时间 Tc决定。理论计算与实验结果完全一致。
激光器 噪声 光纤传感器
1 浙江大学光科系, 杭州 310027
2 中国科学院物理研究所, 北京 100080
描述了主链含过渡金属(Pd或Ni)的多炔聚合物的三阶非线性光学特性。通过四波混频(DFWM)实验，发现其具有高的三阶非线性光学系数，得到｜x(3)｜≌3×10-13 esu，分子超极化率y≌5×10-31 esu，并且在可见和红外区域有较小的吸收系数，这使之成为一种具有许多潜在用途的非线性光学新材料。
有机聚合物 三阶非线性光学系数 四波混频(DFWM)
