基于绝缘体上硅材料的25通道200 GHz的阵列波导光栅

报道了基于绝缘体上硅材料的25通道、信道间隔200 GHz的阵列波导光栅, 分别优化了输入波导/输出波导/阵列波导间的最小间距 (Δxi/Δxo/d) , 及其自由传播区和阵列波导之间边界结构 (W2/L2/L3) .实验结果表明, 该阵列波导光栅的插入损耗为5～7 dB, 串扰为13～15 dB, 该阵列波导光栅的性能得到有效提升.同时也提出了减小插损与串扰的进一步优化方案.     

基于绝缘体上硅材料的25通道200 GHz的阵列波导光栅（英文）

报道了基于绝缘体上硅材料的25通道、信道间隔200 GHz的阵列波导光栅,分别优化了输入波导/输出波导/阵列波导间的最小间距(Δx_i/Δx_o/d),及其自由传播区和阵列波导之间边界结构(W_2/L_2/L_3).实验结果表明,该阵列波导光栅的插入损耗为5～7 dB,串扰为13～15 dB,该阵列波导光栅的性能得到有效提升.同时也提出了减小插损与串扰的进一步优化方案.     

聚合物阵列波导光栅波分复用器带宽平坦化分析

提出了一种阵列波导光栅(AWG)波分复用器带宽平坦化的有效方法。在常规型阵列波导器件中,把相邻奇数阵列波导长度差减少增量,并把相邻偶数阵列波导长度差增加相同的增量,即可获得平坦的箱形波谱响应。对17×17信道聚合物AWG波分复用器的模拟结果表明,箱形波谱响应的3 dB带宽约为0.49 nm,每条输出信道的串扰皆低于-28 dB。     

阵列波导光栅设计参数对串扰特性的影响

从理论上研究了设计参数对阵列波导光栅串扰的影响. 通过分析波导V值、波导阵列间距、罗兰圆输出端波导间距和阵列波导数目等设计参数对各个信道输出场的影响,研究了这些设计参数对阵列波导光栅串扰性能的影响.研究表明:增大V值、输出端波导间距和阵列波导的数目能够减小串扰;输出端波导间距和阵列波导数目增大到一定程度后,再增加时对减小串扰没有明显效果;为了保证单模传输,V值不能超过某上限值. 设计了一个16波长的阵列波导光栅,并用BPM方法进行数值模拟.由于BPM方法不能模拟大的角度变化,我们将阵列波导光栅的模拟分成两个部分:输入输出罗兰圆的模拟和波导阵列的计算.由于光波在阵列波导中的传播对串扰的影响只是在相位上,因此直接的数值模拟只模拟输入输出罗兰圆,而波导阵列的作用用一个相移来代替,并将其加入输入输出罗兰圆的模拟中.为了减少计算时间,只是在需要定量模拟的方面使用了密集网格,而在模拟各参数对串扰的定性影响时使用了较疏的网格.模拟结果与理论分析相符良好.(PD11)     

聚合物阵列波导光栅波分复用器传输特性分析

针对一种中心波长为 1.5 5μm、波长间隔为 1.6 nm的聚合物阵列波导光栅波分复用器 ,对其功率分布、分波波谱、自由光谱区 (FSR)、衍射效率、串扰等进行了详细的分析 .并对波导芯尺寸、相邻阵列波导间距、衍射级数、阵列波导数等参量进行了优化 ,得到了器件实际设计所需要的相应的参数值 ,从而达到优化器件设计的目的     

聚合物阵列波导光栅波分复用器传输特性分析

针对一种中心波长为1.55μm、波长间隔为1.6nm的聚合物阵列波导光栅波分复用器,对其功率分布、分波波谱、自由光谱区(FSR)、衍射效率、串扰等进行了详细的分析.并对波导芯尺寸、相邻阵列波导间距、衍射级数、阵列波导数等参量进行了优化,得到了器件实际设计所需要的相应的参数值,从而达到优化器件设计的目的.     

聚合物阵列波导光栅波分复用器传输特性分析

针对一种中心波长为1.55μm、波长间隔为1.6nm的聚合物阵列波导光栅波分复用器,对其功率分布、分波波谱、自由光谱区(FSR)、衍射效率、串扰等进行了详细的分析.并对波导芯尺寸、相邻阵列波导间距、衍射级数、阵列波导数等参量进行了优化,得到了器件实际设计所需要的相应的参数值,从而达到优化器件设计的目的.     

阵列波导光栅复用/解复用器光栅孔径对器件性能影响的数值分析

阵列波导光栅复用 /解复用器中波导光栅孔径是器件重要的结构参数 .波导光栅孔径数值有限 ,部分光场将因未被耦合进而损失掉 .同时引起输出波导接收端焦场变形 ,增加了器件串扰 .本文详细分析和计算了由于波导光栅孔径有限引起的光场损耗和信号串扰 ,选择适当孔径参数可使其引入的信号损耗和串扰降到足够低 ,以优化设计器件     

阵列波导光栅复用/解复用器光栅孔径对器件性能影响的数值分析

阵列波导光栅复用/解复用器中波导光栅孔径是器件重要的结构参数.波导光栅孔径数值有限,部分光场将因未被耦合进而损失掉.同时引起输出波导接收端焦场变形,增加了器件串扰.本文详细分析和计算了由于波导光栅孔径有限引起的光场损耗和信号串扰,选择适当孔径参数可使其引入的信号损耗和串扰降到足够低,以优化设计器件.     

硅基二氧化硅阵列波导光栅相位误差数值分析

采用传输函数法对硅基二氧化硅阵列波导光栅(AWG)的相位系统误差和随机误差进行了详细的分析.系统误差的模拟结果表明阵列波导的有效折射率和相邻阵列波导长度差ΔL的偏移将会对使中心波长λ0偏离设计值,平板波导有效折射率、阵列波导的间距、罗兰圆聚焦长度R的偏移会使通道间隔偏离设计值.随机误差的模拟结果表明相邻阵列波导长度差、阵列波导中芯区折射率、芯区宽度、芯区厚度的随机波动对AWG的串扰影响较大,而波导上、下包层折射率的波动对AWG串扰影响较小.     

10-GHz-spaced 1010-channel tandem AWG filter consisting of oneprimary and ten secondary AWGs

A very large channel-count arrayed waveguide grating (AWG) filter with more than 1000 channels is described. It was achieved by cascading a 1-THz-spaced flat-top 1×10 AWG as a primary filter and ten 10-GHz-spaced 1×160 AWGs as secondary filters in a tandem configuration. We achieved good adjacent and accumulated channel crosstalk values ranging from -32 to -25 dB and from -24 and -18 dB, respectively     

Aberration theory of arrayed waveguide grating

The general aberration theory of arrayed waveguide grating (AWG) is proposed in this paper. The derived conclusions can be applied to any symmetrical AWGs. With the aberration theory, the spectral response can be optimized. Some performances of an AWG, for example, crosstalk and channel number, are expected to be improved by reducing the aberrations. A common AWG with the Rowland geometry has low aberrations for the absence of the second-order aberration. To further reduce the aberrations, nonstandard AWGs are considered. The AWG based on three stigmatic points is proved to have a perfect performance     

Arrayed waveguide gratings for wavelength routing

Wavelength routing can be performed in the optical domain for both long-haul and passive optical networks. Arrayed waveguide gratings (AWGs) can perform wavelength routing for a large number of optical channels and provide a high level of functionality on an integrated chip. The AWG guides light on a planar lightwave circuit into an array of waveguides that provide dispersion to separate the different wavelengths of light. Routing functions can be performed on individual wavelengths. With this technology, optical cross-connects, optical add/drop multiplexers, and passive optical routers have been demonstrated. Performance issues-such as insertion loss, polarization dependence, passband shape, passband position, crosstalk, and temperature dependence-are being addressed so that AWGs will be practical for deployment into systems     

基于阵列波导光栅的单纤三重波分复用器

利用阵列波导光栅实现单纤三重波分复用器是一种具有很多优点的方法.ITU G.983标准规定了无源光网络的三个波长为1310,1490和1550nm,由于这三个波长的间距相差很大,光谱范围也大,用普通的AWG设计方法不能达到理想的效果.文中提出了一种基于阵列波导光栅的单纤三重波分复用器的新型设计,利用衍射光栅的频谱周期性,使离第二、三波长较远的第一波长工作在不同的衍射级次,并将第一波长映射到与第二、三波长形成几乎等间距信道的第四波长,从而减小了对光栅自由光谱范围的要求,同时使对应这三个工作信道的输入/输出波导几乎等间距,解决了传统设计方法导致的衍射级次小、器件尺寸大、制作困难等问题.     

Arrayed-waveguide grating with branched outputs for simultaneousmultichannel monitoring purposes

We propose an arrayed-waveguide grating (AWG) that has branched output waveguides for simultaneous multichannel monitoring purposes. The transmittances of two adjacent branched output waveguides are slightly different from each other. Thus, we can obtain crossover wavelengths, where the transmittances of adjacent output waveguides are the same with much smaller insertion losses than those of conventional AWGs. As a result, the proposed device can accurately monitor wavelength-division-multiplexed channel wavelengths in the presence of the amplified-spontaneous-emission noise     

氟化聚合物光谱响应平坦化阵列波导光栅的优化设计和制备

本文基于阵列波导光栅(AWG)的传输理论,利用含氟聚合物(PFS-co-GMA)共聚物材料,对17×17信道光谱响应平坦化AWG波分复用器进行了参数优化.由于在聚合物阵列波导光栅器件的制备过程中,选用了反应离子刻蚀(RIE)工艺和蒸汽回溶技术,形成的梯形截面波导芯,使AWG传输的光产生相位移,导致传输光谱移动,引起串扰...     

17×17 硅基聚合物信道箱形光谱阵列波导光栅的制备

Arrayed waveguide grating (AWG) is a key device in wavelength-division multiplexing (WDM) system, and the flat spectral response of the AWG device is required. In this paper, the RIE process has been improved. By using the steam- redissolution technique, the insertion loss and the crosstalk have been reduced. Experimental results show that the central wavelength is 1550.86nm, and 3-dB bandwidth is about 0.478 nm, insertion loss is 10.5 dB, crosstalk is about –22 dB. The insertion loss of an AWG device is reduced by about 3 dB for the central channel and 4.5 dB for the edge channels, and the crosstalk is reduced by 2.5 dB after the steam- redissolution.     

Fabrication of 17 × 17 polymer/Si arrayed waveguide grating with flat spectral response using steam-redissolution technique

Arrayed waveguide grating (AWG) is a key device in the wavelength-division multiplexing (WDM) system, and the flat spectral response of the AWG device is required. In this paper, the RIE process has been improved. By using the steam-redissolution technique, the insertion loss and the crosstalk have been reduced. Experimental results show that the central wavelength is 1550.86 nm, the channel spectral response flatness is about 1.5 dB, 3-dB bandwidth is about 0.478 nm, insertion loss is 10.5 dB, and crosstalk is about-22 dB. The insertion loss of an AWG device is reduced by about 3 dB for the central channel and 4.5 dB for the edge channels, and the crosstalk is reduced by 2.5 dB after the steam- redissolution.     

Design and fabrication of 25-channel 200 GHz AWG based on Si nanowire waveguides

A 25-channel 200 GHz arrayed waveguide grating (AWG) based on Si nanowire waveguides is designed, simulated and fabricated. Transfer function method is used in the simulation and error analysis of AWG with width fluctuations. The 25-channel 200 GHz AWG exhibits central channel insertion loss of 6.7 dB, crosstalk of ?13 dB, and central wavelength of 1 560.55 nm. The error analysis can explain the experimental results of 25-channel 200 GHz AWG well. By using deep ultraviolet lithography (DUV) and inductively coupled plasma etching (ICP) technologies, the devices are fabricated on silicon-on-insulator (SOI) substrate. This work has been supported by the National Key Research and Development Program of China (No.2016YFB0402504), and the National Natural Science Foundation of China (Nos.61435013 and 61405188). E-mail:zhangjiashun@semi.ac.cn      

箱型光谱响应聚合物阵列波导光栅的研制

通过减少奇数阵列波导的芯宽度,同时增加偶数阵列波导的芯宽度的技术,构造了箱型光谱. 选用氟化聚芳醚FPE聚合物材料,设计并制备了17×17信道箱型光谱响应阵列波导光栅（AWG）波分复用器. 测试结果表明,器件的中心波长为1550.87nm,波长间隔为0.8nm, 3dB带宽约为0.476nm,串扰低于-21dB,插入损耗为13~15dB.