工艺公差对阵列波导光栅波分复用器性能的影响

依据阵列波导光栅(AWG)的传输理论,分析了工艺公差对硅基聚合物AWG波分复用器性能的影响.分析结果表明,工艺公差将引起AWG传输光谱的漂移,并使串扰增大.为了实现AWG器件正常的解复用功能,我们对AWG工艺公差的累积和补偿效应进行了讨论.     

相位误差对AWG波分复用器非相邻通道串扰影响的分析

分析了工艺制作过程中引入的阵列波导相位误差以及由其所引起的非相邻通道间串扰性能的劣化,给出了相应的分析公式.利用该公式,可以简捷地分析所设计的AWG型器件的非相邻通道串扰水平,为优化AWG型器件的设计提供依据.     

相位误差对AWG波分复用器非相邻通道串扰影响的分析

分析了工艺制作过程中引入的阵列波导相位误差以及由其所引起的非相邻通道间串扰性能的劣化,给出了相应的分析公式.利用该公式,可以简捷地分析所设计的AWG型器件的非相邻通道串扰水平,为优化AWG型器件的设计提供依据.     

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...     

40通道100G间隔AWG的研制

本文利用BPM算法设计了40通道100G间隔的AWG,并利用PLC标准工艺制作了AWG器件.该器件的插入损耗为4 dB,相邻通道串扰为30 dB,非相邻通道串扰为38 dB,1 dB带宽为0.26 nm,实现了预先设计的目标.     

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.     

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.     

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.     

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.     

作波分复用AWG同频串扰的相关特性及理论研究

本文讨论了光信号在阵列波导光栅（AWG）中同频光电流串扰的自相关函数,从理论上探讨了同频串扰的自相关系数,研究了相关系数与同频串扰引起延时的关系,及同频串扰噪声功率和串扰的极化方向的关系,得到了相关系数R_F与AWG延时时间τ、记录值n之间的关系曲线.数值计算表明:串扰延时使AWG的传输信号存在负相关、弱相关、正相关,其串扰延时对记录长度的影响呈周期性变化.     

Interrogation of a Long-Period Grating Sensor by a Thermally Tunable Arrayed Waveguide Grating

An interrogation technique for a long-period grating (LPG) sensor is studied theoretically and experimentally. By employing a thermally tunable arrayed waveguide grating (AWG), the center wavelength of the LPG sensor is successfully measured using the linear temperature dependence of the AWG transmission wavelengths. Initial results show that the proposed interrogation technique can provide a resolution of 1 pm and interrogation range of 25 nm. Furthermore, this technique has the potential of being packaged into a low-cost and compact-size device.      

Analysis of Optical Singal Transmission Characteristics in AWG Multi/Demultiplexer with Electromagnetic Field Theory

Based on the electromagnetic field theory,the optical signal transmission characteristics in input/output waveguides,slab waveguides and arrayed waveguides of the arrayed waveguide grating(AWG) multi/demultiplexer are analyzed.The relationship between the physical parameters such as geometry sizes and relative refractive index in AWG multi/demultiplexer and the optical signal transmission characteristics are discussed.This theoretical study can be used for optimizing the design and improving the performance of the AWG multi/demultiplexer.     

Analysis of Optical Signal Transmission Characteristics in AWG Multi/Demultiplexer with Electromagnetic Field Theory

Based on the electromagnetic field theory, the optical signal transmission characteristics in input/output waveguides, slab waveguides and arrayed waveguides of the arrayed waveguide grating (AWG) multi/demultiplexer are analyzed. The relationship between the physical parameters such as geometry sizes and relative refractive index in AWG multi/demultiplexer and the optical signal transmission characteristics are discussed. This theoretical study can be used for optimizing the design and improving the performance of the AWG multi/demultiplexer.     

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     

Si纳米线阵列波导光栅制备

采用绝缘层上Si(SOI)材料设计制备了3×5纳米线阵列波导光栅(AWG),器件大小为110μm×100μm。利用简单传输法模拟了器件的传输谱,并采用二维时域有限差分(FDTD)模拟中心通道输出光场的稳态分布,模拟结果表明,器件的通道间隔为11 nm,通道间的串扰为18 dB。通过电子束曝光(EBL)和感应耦合等离子(ICP)刻蚀制备了所设计的器件,光输出谱测试分析表明,器件中心通道的片上损耗为9 dB,通道间隔为8.36～10.40 nm,中心输出通道的串扰为6 dB。在误差允许范围内,设计和测试的结果一致。     

Efficient Transmission Scheme for AWG-Based DWDM Millimeter-Wave Fiber-Radio Systems

We propose and demonstrate an upstream transmission scheme using a semiconductor optical amplifier (SOA) for arrayed waveguide grating (AWG)-based dense wavelength-division-multiplexed (DWDM) millimeter-wave fiber-radio systems and show improved link performance. In our scheme, unused optical carriers from the cyclic AWG in the downlink (DL) are tapped for uplink (UL) transmission. An SOA in conjunction with the AWG simultaneously amplifies the DL RF subcarriers and UL optical carrier, thus improving carrier-to-sideband ratio in the DL while also yielding an improved power budget for the UL. Our experimental results show that the proposed scheme can be a practical solution for future bidirectional wavelength interleaved DWDM transmission systems     

AWG插入损耗性能的分析和改善

阵列波导光栅(AWG)是实现密集波分复用(DWDM)光网络的理想器件，插入损耗是它的一个重要性能指标．文章在综述了多种减小AWG器件插入损耗方法的基础上，分析了如何使用楔形波导结构来降低模式失配所导致的耦合损耗．这种方法可以在不增加器件制作难度的同时大大降低AWG的插入损耗，并且适用于各种材料和结构的AWG器件设计。     

一种新颖结构紧凑的AWG器件

给出一种基于SOI材料结构紧凑的新颖AWG器件,它是将一个全内反射波导镜插入原波导阵列中间,并且利用全内反射时产生的相位差进行TE、TM模偏振补偿的方法,该器件具有尺寸小、制作工艺简单等特点.同时,给出一些实验结果,实验结果证实这种结构的AWG器件是可行的.     

基于阵列波导光栅的波分复用器件

阵列波导光栅波分复用 /解复用器有 N个输入端口和 N个输出端口 ,能同时传输 N2 路不同的光信号 ,除具有波分复用和解复用功能外 ,能灵活地与其它光器件组成多波长激光器、光路分插复用器、光路交叉连接器、波长路由器等波分复用器件 ,在光通信网络中有着广泛的应用前景。