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.     

17×17信道光谱响应平坦化的聚合物阵列波导光栅的研制

选用氟化聚芳醚FPE聚合物材料,设计并制备出了17×17信道光谱响应平坦化阵列波导光栅（AWG）波分复用器.实验测试结果表明,器件的中心波长为1550.83nm,波长间隔为0.8nm,3dB带宽约为0.476nm,插入损耗为13-15dB,串扰低于-21dB.     

17×17信道光谱响应平坦化的聚合物阵列波导光栅的研制

选用氟化聚芳醚FPE聚合物材料,设计并制备出了17×17信道光谱响应平坦化阵列波导光栅(AWG)波分复用器.实验测试结果表明,器件的中心波长为1550.83nm,波长间隔为0.8nm,3dB带宽约为0.476nm,插入损耗为13～15dB,串扰低于-21dB.     

17×17信道光谱响应平坦化的聚合物阵列波导光栅的研制

选用氟化聚芳醚FPE聚合物材料,设计并制备出了17×17信道光谱响应平坦化阵列波导光栅（AWG）波分复用器. 实验测试结果表明,器件的中心波长为1550.83nm,波长间隔为0.8nm, 3dB带宽约为0.476nm,插入损耗为13~15dB,串扰低于-21dB.     

用于单片集成的InP阵列波导光栅设计和制备

InP 阵列波导光栅(AWG)是InP 基单片多波长转换器中的重要单元。采用深脊型波导结构,设计了一种10通道、通道间隔200GHZ(1.6nm)的偏振无关型InP基阵列波导光栅。采用外延技术、光刻、感应耦合等离子体刻蚀技术等在实验室制造出了这种AWG。经过测试,插入损耗约为-8dB,串扰小于-17dB,中心通道和旁边通道的通道均匀性基本上在3dB左右。     

一种减小聚合物阵列波导光栅光谱漂移的有效方法

报道了一种在工艺制作过程中减小聚合物阵列波导光栅(AWG)器件光谱漂移的有效方法,通过调整波导芯层的旋涂转速来控制芯层的厚度进而可以有效地减小器件的光谱漂移.AWG器件的设计中心波长为1550.918 nm,制作的AWG器件的实际中心波长为1550.85 nm,即利用该方法使传输光谱的漂移减小到0.07nm,远远小于波长间隔0.8 nm,改善了器件的解复用功能.     

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.     

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。     

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...     

The role of photomask resolution on the performance ofarrayed-waveguide grating devices

The crosstalk performance of an arrayed-waveguide grating (AWG) multiplexer or demultiplexer is primarily caused by random optical phase errors introduced in the arrayed waveguides. Because the layout of waveguides on a wafer is patterned via photomask through the photolithography process, the resolution of a photomask has a direct influence on the phase errors of an AWG. The paper presents a theoretical analysis on the phase error caused by photomask resolution and other basic design parameters. Both calculation and measurement results show that a high-resolution photomask (better than 25 nm) is a critical requirement to produce low-crosstalk (less than -30 dB) AWG demultiplexers. We also investigate the effect of nonideal power distribution in the arrayed waveguides because it contributes considerable phase errors when material impurity is not well controlled during wafer fabrication. Basic criteria of power profile truncation, number of grating waveguides, and material index variation are also summarized     

Eight-channel flat spectral response arrayed-waveguide multiplexer with asymmetrical Mach-Zehnder filters

An eight-channel flat spectral response arrayed-waveguide grating (AWG) multiplexer with asymmetrical Mach-Zehnder filters has been fabricated on the planar lightwave circuit (PLC). The monotonic spectral loss characteristics of AWG have been canceled by the opposite spectral response in the asymmetric MZ filter. The 1.5 dB bandwidth of 141 GHz and 3 dB bandwidth of 159 GHz are obtained for the 200 GHz channel spacing. The 1.5 dB bandwidth becomes 1.8 times wider than that of the conventional AWG. Crosstalks to neighboring and all other channels are less than -24 dB and the on-chip insertion losses range from 7.0 to 7.4 dB, respectively.     

New design for low-loss star couplers and arrayed waveguide gratingdevices

We propose a new loss reduction method in star couplers employing UV-written tapers that replace the free propagation region in the conventional star couplers and apply them to an arrayed waveguide grating (AWG) device. The insertion loss of the new AWG device can be reduced to 0.31 dB, which is about 0.7 dB lower than that of the AWG without UV-written tapered waveguides     

工艺误差对AWG串扰特性的影响

分析了阵列波导光栅器件的制作过程中引入的各种工艺误差。对波导尺寸误差、折射率误差以及长度误差进行了等效,并计算了位相误差和振幅误差的方差。最后分析了位相误差和振幅误差对阵列波导光栅的频谱特性尤其是相邻通道间的串扰特性的影响。     

Improve Channel Uniformity of an Si-Nanowire AWG Demultiplexer by Using Dual-Tapered Auxiliary Waveguides

Dual-tapered auxiliary waveguides at the exit of the waveguide array are introduced to improve the channel uniformity of an Si-nanowire-based arrayed waveguide grating (AWG) demultiplexer. By using a hybrid simulation method, the dual-tapered auxiliary waveguides of the AWG demultiplexer are optimized reliably and efficiently. A 12-channel AWG demultiplexer is designed as an example, and a small nonuniformity (< 0.5 dB) is achieved.     

Design and Analysis of 4×4 Arrayed Waveguide Grating Multiplexer

The operation principle of an arrayed waveguide grating(AWG) multiplexer is introduced and the 4×4 AWG with following design parameters is discussed in detail, such as the choice of wavelength, the neighboring arrayed waveguide distance ΔL, the channel frequency interval Δf, and the free spectral range. The structure of 4×4 AWG is designed and the result of stimulated test is also given. Analysis shows that the 4×4 AWG is characterized by a wide dynamic range, low crosstalk, better spectrum properties, and a compact structure.     

Low-loss fibre-pigtailed 256 channel arrayed-waveguide gratingmultiplexer using cascaded laterally-tapered waveguides

A fibre-pigtailed 25 GHz-spacing 256 channel arrayed-waveguide grating (AWG) module has been fabricated. The module was composed of an AWG chip with a Δ of 1.5%, a fan-out planar lightwave circuit (PLC) with a A of 0.75%, an input fibre and two 128 fibre arrays. To improve the coupling loss of the 256 output fibres, a new PLC-fibre connection using cascaded laterally-tapered waveguides was developed. The fibre-pigtailing loss is reduced to only 1.1 dB and a multiplexer with a low insertion loss of 1.9-3.9 dB is realised