共查询到18条相似文献,搜索用时 171 毫秒
1.
1×N信道聚合物微环谐振器电光开关阵列的开关特性 总被引:1,自引:1,他引:0
利用耦合模理论、电光调制理论和微环谐振理论,提出了一个完善合理的聚合物微环谐振器电光开关阵列模型.该器件由1条水平信道、N条竖直信道和N个微环构成,在微环上施加不同方式的驱动电压,可以实现N+1条信道的开关功能.以1×8信道结构为例,在1 550 nm谐振波长下对该器件进行了优化设计和模拟分析.其结果是:微环波导芯的截面尺寸为1.7×1.7 μm2,波导芯与电极间的缓冲层厚度为2.5 μm,电极厚度为0.2 μm,微环半径为13.76 μm,微环与信道间的耦合间距为0.14 μm,输出光谱的3 dB带宽约为0.05 nm,开关电压约为12.6 V,插入损耗约为0.67~1.26 dB,串扰小于-20 dB,开关时间约为11.35 ps. 相似文献
2.
聚合物微环谐振器电光开关阵列的优化与模拟 总被引:1,自引:0,他引:1
利用耦合模理论、电光调制理论和微环谐振理论,提出了一个聚合物微环谐振器电光开关阵列的模型.该器件由N-1个微环和N条平行信道构成,在微环上施加不同方式的驱动电压,可以实现N条信道的开关功能.以7微环8信道结构为例,在1550 nm谐振波长下对该器件进行了优化和模拟.结果表明,微环波导芯的截面尺寸为1.7μm×1.7μm,波导芯与电极间的缓冲层厚度为2.5 μm,电极厚度为0.2μm,微环半径为13.76 μm,微环与信道间的耦合间距为0.14μm,输出光谱的3 dB带宽约为0.05 nm,开关电压约为8.1 V左右,插入损耗约为0.23~4.6 dB,串扰小于-20 dB. 相似文献
3.
利用耦合模理论、电光调制理论和微环谐振理论,提出了一个完善合理的聚合物微环谐振器电光开关阵列模型.该器件由1条水平信道、N条竖直信道和N个微环构成,在微环上施加不同方式的驱动电压,可以实现N+1条信道的开关功能.以1×8信道结构为例,在1 550 nm谐振波长下对该器件进行了优化设计和模拟分析.其结果是:微环波导芯的截面尺寸为1.7×1.7 μm2,波导芯与电极间的缓冲层厚度为2.5 μm,电极厚度为0.2 μm,微环半径为13.76 μm,微环与信道间的耦合间距为0.14 μm,输出光谱的3 dB带宽约为0.05 nm,开关电压约为12.6 V,插入损耗约为0.67~1.26 dB,串扰小于-20 dB,开关时间约为11.35 ps. 相似文献
4.
聚合物微环电光开关的模拟和优化 总被引:5,自引:4,他引:1
利用耦合模理论、电光调制理论和微环谐振理论,提出一个完善合理的聚合物微环电光开关的器件模型,并给出了可用以分析微环谐振过程的光强传递函数,据此在谐振波长1 550 nm下对该器件进行了模拟和优化.结果表明:微环波导芯截面尺寸为1.8×1.8 μm2,波导芯与电极间的限制层厚度为1.1 μm,电极厚度为0.15 μm,微环半径为15.2 μm,微环与信道间的耦合间距为0.16 μm,光绕微环转300 圈即可形成稳定的谐振状态,此时的谐振时间约为147.4 ps.不加电压时,下信道的插入损耗约为0.8 dB,上信道的串扰约为-26 dB;当取工作电压等于19.7 V为开关电压时,上信道的插入损耗约为0.34 dB,下信道的串扰约为-20 dB. 相似文献
5.
利用两组串联五环谐振器以及它们与两信道波导的交叉耦合作用,优化设计并模拟了一种超低串扰2×2新型聚合物电光开关.为了表征器件的输出光功率特性,给出了器件结构、分析理论和相关公式.为了在下行端口(drop端口)得到箱型光谱响应以及极低的串扰和插入损耗,优化了微环谐振级数和耦合间距.对器件输出光功率和输出光谱的模拟分析结果显示,器件交叉和直通态间的切换电压为4V,交叉和直通态下两端口间的串扰分别为-66dB和-54.7dB,插入损耗分别为2.34dB和0.24dB.在1GHz方波信号作用下,器件drop端口的上升和下降时间分别为15ps和90ps.由于聚合物微环的弯曲半径仅为19.45μm,因此该器件具有超紧凑的尺寸,其长度和宽度仅为0.407mm,约为马赫-曾德尔干涉仪或者定向耦合器等一般结构聚合物电光开关长度的1/10.依赖于小的封装尺寸和极低的串扰,该器件可以高密度地集成在光电子芯片上,在光片上网络中光信号的控制方面具有潜在的应用. 相似文献
6.
利用耦合模理论、电光调制理论和微环谐振理论,提出一个聚合物串联耦合双环电光开关器件模型,在1.55 μm谐振波长下对该器件进行了模拟和优化.结果为:微环波导芯截面尺寸为1.6×1.6 μm2,波导芯与电极间的限制层厚度为1.6 μm,电极厚度为0.15 μm,微环半径为15.2 μm,微环与信道间的耦合间距为0.14 μm,微环与微环间的耦合间距为0.6 μm,输出光谱的3 dB带宽约为0.06 nm,开关电压约为6 V左右,插入损耗约为2.2 dB,串扰约为-20 dB.所设计的双环电光开关较单环型电光开关不仅输出光谱更加平坦陡峭,非谐振光更弱,而且开关电压更低. 相似文献
7.
针对两节独立反相集总电极聚合物Y型耦合器电光开关响应速度慢的问题,通过对该器件两节电光区的波导进行推挽极化,设计了一种无偏置行波电极高速电光开关.为了获得低的驱动电压、良好的阻抗匹配和光波与微波间较小的折射率失配,对电极参数做了设计和优化.通过对施加的方波开关信号做傅里叶变换并结合行波传输线理论,给出了一种用于建模和表征器件高频响应的解析分析法.对该器件的数值计算结果表明,在1 550nm中心工作波长下,其3dB状态电压为0 V,开关电压为2.68V,上分支状态电压和下分支状态电压分别为-1.34V和+1.34V,器件的插入损耗和串扰分别小于3.55和-30dB,10%~90%上升时间和下降时间均为3.90ps,截止开关频率可达128.2GHz. 相似文献
8.
9.
10.
聚合物定向耦合电光开关的模拟和优化 总被引:1,自引:1,他引:0
阐述了定向耦合电光开关的基本结构及工作原理,利用耦合模理论和电光调制理论,在1 550 nm波长下,对器件的结构参量进行了优化,并对其传输光谱、开关电压、插入损耗、串扰等特性进行了分析.模拟过程中,考虑了因金属电极和聚合物材料引起的模式损耗.器件的结构参量优化值为:波导芯截面尺寸为1.7×1.7 μm2,波导芯与电极间的限制层厚度为1.5 μm、电极厚度为0.15 μm,波导间的耦合间距为2.0 μm,相应的耦合长度为2 926 μm.模拟结果表明,本文所设计的器件在开关转换电压0和17.4 V下,在1 534到1 565 nm的波长范围内,器件的插入损耗小于0.16 dB,串扰小于-20 dB,耦合区在2 734~3 120 μm范围内,器件的插入损耗小于0.22 dB,串扰小于-20 dB. 相似文献
11.
Qian-Qian Luo Chuan-Tao Zheng Lei Liang Chun-Sheng Ma Da-Ming Zhang 《Fiber and Integrated Optics》2013,32(3):187-208
Abstract The self-imaging theory is improved for designing a polymer multimode interference Mach–Zehnder interferometer electro-optic switch. The electro-optic overlap factor is enhanced from 0.6510 to 0.9658 through adopting an embedded coplanar waveguide electrode. Considering the mode dispersion effect, formulations of time-domain response are derived, and switching characteristics are analyzed. The total device length is about 7.175 mm, the switching voltage is 2.622 V, and the switching time is 29.90 ps. The lightwave 3-dB bandwidth is 20 nm, the insertion loss is less than 2.70 dB, and the crosstalk under cross and bar states are less than ?55 dB and ?45 dB, respectively. 相似文献
12.
13.
Analysis of polymer electro-optic microring resonator switches 总被引:1,自引:0,他引:1
The structure and the principle for the polymer electro-optic microring resonator (MRR) switch are proposed as well as the transfer functions. The structural parameters are optimized; the transmission characteristics are analyzed including the output power, switching time, switching voltage, insertion loss, and crosstalk. When the operation voltage is 0 V, the insertion loss and crosstalk are ∼1.2 and −20.2 dB, respectively; when the operation voltage is 10.0 V, those are ∼0.35 and −20.0 dB, respectively. Furthermore, a novel method is presented for analyzing time-domain response of the device and the switching time is determined to be ∼10.71 ps. These results indicate the favorable switching functions of the designed device. 相似文献
14.
数值模拟二维间隙表面等离子波导传输特性 总被引:2,自引:2,他引:0
利用表面等离子激元的新颖特性,设计了二维间隙表面等离子波导.以这种结构为基础通过变形和组合形成90°直角弯曲波导、T型光功率分配器和光开光,采用时域有限差分法研究了它们的传输特性.结果表明:不同于介质光波导的弯曲损耗来自于辐射泄漏,90°直角弯曲间隙表面等离子波导的能量损耗主要来自于金属中的欧姆热损耗.在间隙达到40 nm以上后,当直行段的长度适当时,弯曲段的透射率较相同长度的直波导的透射率要大.T型光功率分配器在两输出波导的间隙宽度比达到0.6及以上时,不同于传统介质波导的分光原则,能量主要沿等效折射率较小的输出臂流出.当两输入光的相位反相时,T型光开关处于输出截止的状态,当两输入光的相位同相时,T型光开关处于输出导通的状态.所有波导间隙均小于衍射极限,实现了超衍射极限传播,可用于未来了超大规模集成光路中. 相似文献
15.
Fast Integrated Electro-Optical Switch and Beam Deflector Based on Nematic Liquid Crystal Waveguides
L. Sirleto L. Petti P. Mormile G. C. Righini G. Abbate 《Fiber and Integrated Optics》2002,21(6):435-449
In this paper, the design, the realization, and the experimental characterization of an integrated electro-optical switch and a beam deflector, both based on planar nematic liquid crystal (NLC) waveguides, are reported.
In order to test such devices, a particular waveguide structure consisting of a three-stage device, having a thin nematic LC film as the middle stage and two glass waveguides as the other stages, has been designed and realized. The electro-optical behavior and the response time have been studied for different configurations for both TE and TM polarized light. By a proper choice of the material parameters and because of the presence of an additional constant bias voltage, we got response time in the microsecond range. The experimental results obtained are very promising in the frame of integrated electro-optical devices, even if the effect underlying the results is not yet understood and probably needs some deeper research into liquid crystal physics and surface interactions. 相似文献
In order to test such devices, a particular waveguide structure consisting of a three-stage device, having a thin nematic LC film as the middle stage and two glass waveguides as the other stages, has been designed and realized. The electro-optical behavior and the response time have been studied for different configurations for both TE and TM polarized light. By a proper choice of the material parameters and because of the presence of an additional constant bias voltage, we got response time in the microsecond range. The experimental results obtained are very promising in the frame of integrated electro-optical devices, even if the effect underlying the results is not yet understood and probably needs some deeper research into liquid crystal physics and surface interactions. 相似文献
16.
An Easily Operating Polymer 1×4 Optical Waveguide Switch Matrix Based on Vertical Couplers 下载免费PDF全文
Kaixin Chen Pak L Chu Hau Ping Chan Kin S. Chiang 《中国物理快报》2007,24(6):1728-1730
A three-dimensional (3D) polymer thermo-optic (TO) 1 × 4 waveguide switch matrix based on vertical couplers is demonstrated. It consists of four basic 3D switch units and because of its 3D structure, its construction is compact, only 9 mm in length; moreover, the control logic of the entire switch is very simple, the light signal can be easily switched to any output port by operating only a single switch unit. The finished devices exhibit a switching extinction ratio greater than 21 dB for all of four output ports and the crosstalk between two adjacent output ports is lower than -19 dB. The rise time and the fall time of the switch matrix are 0.8ms and 1.4ms, respectively. The required electrical power to initiate the switching function for M1 switching units is about 50mW. 相似文献
17.
Fast Integrated Electro-Optical Switch and Beam Deflector Based on Nematic Liquid Crystal Waveguides
L. Sirleto L. Petti P. Mormile G. C. Righini G. Abbate 《Fiber and Integrated Optics》2013,32(6):435-449
In this paper, the design, the realization, and the experimental characterization of an integrated electro-optical switch and a beam deflector, both based on planar nematic liquid crystal (NLC) waveguides, are reported. In order to test such devices, a particular waveguide structure consisting of a three-stage device, having a thin nematic LC film as the middle stage and two glass waveguides as the other stages, has been designed and realized. The electro-optical behavior and the response time have been studied for different configurations for both TE and TM polarized light. By a proper choice of the material parameters and because of the presence of an additional constant bias voltage, we got response time in the microsecond range. The experimental results obtained are very promising in the frame of integrated electro-optical devices, even if the effect underlying the results is not yet understood and probably needs some deeper research into liquid crystal physics and surface interactions. 相似文献