集成光收发芯片中激光器调制特性研究

文章从理论上研究了一种应用于光纤到户(FTTH)网络中的基于单片集成的双端口光收发芯片,结合器件的结构和参数分析了该产品的直接调制特性,计算了其驰豫振荡、增益抑制和频率啁啾,得到了该器件的直接调制频率限制和频率啁啾效应下的输出光场表达式,并通过仿真分析得出了高频直接调制频率啁啾下的输出光频谱.     

Low-cost and low-electromagnetic-interference packaging of optical transceiver modules

The low-cost and low-electromagnetic-interference (EMI) packaging of optical transceiver modules employing housings of plastic composites are developed and fabricated. Optical transceiver modules fabricated by the plastic composites with transmission rates of 1.25 and 2.5 Gb/s are tested to evaluate the electromagnetic (EM) shielding against emitted radiation from the plastic packaging. The results show that these packaged optical transceiver modules with their high shielding effectiveness (SE) are suitable for use in low-cost and low-EMI Gigabit Ethernet lightwave transmission systems. By comparison of cost, weight, and shielding performance for optical transceiver modules fabricated by the housings of nylon and liquid-crystal polymer with carbon fiber filler composites, woven continuous carbon fiber (WCCF), and nanoscale hollow carbon nanocapulses (HCNCs) epoxy composites, the WCCF composite shows lower cost, lighter weight, and higher EM shielding than the other types of composites. Future studies may develop the low-cost and low-EMI optical transceiver modules using nanoscale HCNCs that have the combination of excellent physical and mechanical properties, light weight, and thinness compared with the conventional fabrication techniques.     

EPON光收发模块的性能要求

文章针对EPON系统的各个技术特点，分别阐述了其对系统所用光收发模块的性能参数的要求，同时旬出了IEEE802.3ah对这些参数的建议，并对目前业内EPON光收发模块的研发现状和今后的发展方向做了一定的分析。     

低损耗聚合物互连光波导的制备及性能测试

对应用于宽带光互连的光印刷电路板(OPCB)制备技术进行了研究。作为光互连系统的传输介质,我们研究了互连光波导的性能。基于紫外光刻技术,在常规PCB基底上制备了聚合物光波导,研究了光波导的制备流程以及工艺参数;并且通过不断优化工艺参数,制备得到了低损耗的光波导;通过测试光波导的传输损耗以及眼图,分析了光波导的性能。光波导在850nm波长条件下的传输损耗可以达到0.13dB/cm,实现了10Gbit/s光通信信号的传输。     

小型化高集成宽带光收发组件

当前分立光子器件的体积和成本严重制约着微波光子技术在雷达系统中的应用。受限于当前的集成能力和材料体系,微波光子单片集成芯片短时间内难以实现工程应用。为满足雷达等应用场景对高集成微波光子器件的迫切需要,研制了一种新型小型化高集成光收发组件。该组件采用光电异构集成封装技术,将MZM调制器芯片、微波芯片、探测器芯片以及光环形器、波分复用器进行高度集成,单模块体积仅为85 mm×35 mm×10 mm,与传统MZM调制器体积相当。实验结果表明,其性能可与传统分立元器件相媲美。在6~18 GHz范围内,组件能够实现±1.5 dB的平坦度,上行能够实现18 dB以上的增益,下行能够实现?1 dB以上的增益,且链路噪声系数小于30 dB,平面化、小型化设计使其能够应用于相控阵雷达、电子战等多种应用场景,具有广阔的应用前景。     

Digitizing radio-over-fiber transceiver based on optical tunable encoder and optical codewords

Radio over fiber (RoF) is a very attractive and promising technology for wireless access networks, because of several advantages such as providing huge bandwidth, inherent immunity to electromagnetic interference and reduced power consumption. The analog RoF networks cannot be used for the transmission of radio signals over long lengths of fiber due to the distortions induced by dispersion and nonlinearity of the optical link. The digitized RoF communication presents an interesting alternative to circumvent the limitations of ARoF networks. In this paper, we propose an all-optical DRoF (Digital RoF) scheme based on the optical encoding technique and optical codewords instead of modulation techniques. The proposed scheme is composed of an all-optical sampler, an all-optical thresholder and an all-optical encoder. The proposed all-optical DRoF design is simulated by implementing its three main components using the simulation platform, Optisystem. We have also studied the capacity of the proposed encoding architecture in terms of the maximum number of chips that can be supported. Furthermore, ARoF, DRoF and the proposed all-optical DRoF systems are compared based on the minimum bit error rate, the maximum quality factor, and the complexity and implementation cost.     

国内研制出高速QSFP全光收发一体光缆

近日,中国科学院微电子研究所系统封装研究室研制出国内第一款全光QSFP收发一体光缆,其速率达到4×10Gbps,填补了国内空白。     

Fabrication of a stress-guiding optical fibre

The principle of stress guidance in optical fibres is described. An optimum-stress-guidance structure has been designed and fabricated using gas-phase etching. The fibre is the first to have truly single-polarisation operation for all V-values.     

基于SFP的OLT新型光收发模块的设计

在分析光收发一体化模块特点的基础上,提出了基于SFP的EPON系统OLT收发模块的实现方案,针对硬件实现中各部分的功能和具体需求给出了核心模块的具体实现模块,满足GE-PON ITU-T G.984规定的输出平均光功率和消光比的要求。在设计过程中采用技术成熟的芯片来完成设计,该设计在尺寸、性能上满足ITU-T G.984的要求。     

一种适用于塑料光纤局域网的收发器研究

提出了一种适用塑料光纤局域网的光纤收发器.收发器首先将输入的数据源进行CMI编码,再经过发送单元发送光信号;其次将接收到的光信号经过解码后送至光接收单元还原出原始数字序列.完成了仿真实验及实验室中与现有局域网中广泛使用的RJ-45接头的连接.实验证明该光纤收发器的可行性和有效性.     

Fe-C合金膜光纤腐蚀传感器的制作及性能研究

为了在光纤纤芯上制备更符合要求的Fe-C合金膜,取代了氢氟酸(HF)腐蚀包层的方法,选用刀笔去除光纤的涂覆层和包层;分别使用物理气相沉积离子溅射金及Fe-C合金、物理气相沉积真空蒸镀Fe-C合金、化学镀铜4种方法使纤芯表面金属化。经过对比分析,选择在金膜和铜膜上继续利用电镀方法沉积上不同厚度的Fe-C合金膜,进而进行腐蚀传感实验。最后利用新的实验数据记录方法,并通过实验中不同厚度的Fe-C合金膜表现出的传感特点,提出了一个腐蚀定量监测方案。结果表明,通过离子溅射金使纤芯金属化是一个相对较好的方法,这为Fe-C合金膜光纤腐蚀传感器的进一步发展开启了新思路。     

Fe-C合金膜光纤腐蚀传感器的制作及性能研究

为了在光纤纤芯上制备更符合要求的Fe-C合金膜,取代了氢氟酸(HF)腐蚀包层的方法,选用刀笔去除光纤的涂覆层和包层;分别使用物理气相沉积离子溅射金及Fe-C合金、物理气相沉积真空蒸镀Fe-C合金、化学镀铜4种方法使纤芯表面金属化.经过对比分析,选择在金膜和铜膜上继续利用电镀方法沉积上不同厚度的Fe-C合金膜,进而进行腐蚀传感实验.最后利用新的实验数据记录方法,并通过实验中不同厚度的Fe-C合金膜表现出的传感特点,提出了一个腐蚀定量监测方案.结果表明,通过离子溅射金使纤芯金属化是一个相对较好的方法,这为Fe-C合金膜光纤腐蚀传感器的进一步发展开启了新思路.     

Medium型Camera link视频光纤收发器设计

为了满足高清相机对光纤通道高带宽的要求,提出了一种基于FPGA的Medium型Camera link视频光纤传输方案.设计中利用DS90UH925Q/926Q芯片实现高速数据的串行/解串功能,FPGA中实现系统的总体控制以及对2路串行数据的光通道绑定.系统传输速率高达5.95Gb/s,误码率低于10-12,通道时延为250ns.     

一种多功能SFP光模块监测平台的设计与实现

设计并实现了-种SFP光模块实时监测平台,该平台可实时监测SFP光模块的温度、电压、激光器偏置电流以及发射和接收光功率等参量.该平台的应用简化了系统维护工作,提高了系统的可靠性.     

Fabrication of wire-grid polarizers and dependence of submillimeter-wave optical performance on pitch uniformity

We describe a device for fabricating high-precision free-standing grids of fine wire, suitable for use as polarizing elements for radiation at millimeter and submillimeter wavelengths. Computer control of the winding process makes changing grid parameters particularly convenient and flexible. We present measurements of the mechanical uniformity and of the optical performance of wire grid polarizers made with 25 μm and 10 μm diameter wire. The flexibility of computer control is exploited to introduce a known degree of randomness in the grid pitch (center-to-center wire spacing), allowing the dependence of polarizer quality on uniformity to be quantified. This information allows prediction of the fabrication tolerances required for polarizers to be used at very high frequencies.     

EPON中光收发终端注册的模块设计研究

在对EPON系统的组成、结构、工作原理、多点控制协议进行了介绍的基础上,阐述了ONU注册的过程以及注册过程中会出现的冲突问题及其解决办法,并分析注册过程特点,通过相应功能模块实现ONU注册。仿真结果进行分析表明,ONU能够快速准确的在OLT上实现注册。     

Fabrication and performance of low loss optical components made byion exchange in glass

Passive optical components made by photolithography with ion exchange in glass have been developed. The technology used to fabricate these components is described, and their performance characterization is discussed. It is shown that this technique produces highly uniform low-loss devices     

1773数据总线光收发器的设计与测试

文章介绍了一种能够独立传输MIL-STD-1773协议的光收发器.该系统采用全直流耦合,支持突发工作模式,具有接收灵敏度低(≤-20 dBm),动态范围大(≥10 dB),传输距离远等特点.文章重点介绍了系统的应用背景、设计方案、工作原理、控制电路设计、输出曲线分析以及测试得到的主要参数.