Design of a multi-channel free space optical interconnection component

A multi-channel free space optical interconnection component, fiber optic rotary joint, was designed using a Dove prism. When the Dove prism is rotated an angle of at around the longitudinal axis, the image rotates an angle of 2 at. The optical interconnection component consists of the signal transmission system, Dove prim and driving mechanism. The planetary gears are used to achieve the speed ratio of 2：l between the total optical interconnection component and the Dove prism. The Clenses are employed to couple different optical signals in the signal transmission system. The coupling loss between the receiving fiber of stationary part and the transmitting fiber of rotary part is measured.     

大内径离轴光纤旋转连接器的设计与实现

为了实现旋转系统之间的光信号耦合,设计了一 种新型的大内径离轴光纤旋转连接器。 将光纤准直器 和红外直角棱镜按照一定的规则排布在法兰盘上,使光信号能在较大离轴偏移量下保持持续 传输状态。分 析了影响离轴光信号传输耦合效率的主要因素,通过优化热扩芯光纤(TECF)准直器和红外直 角棱镜进一步减小了 离轴光纤旋转连接器的耦合损耗。研制的离轴光纤旋转连接器法兰盘内径为60mm, 内外法兰盘上的TECF准直器分别为16个, 并行光收发器实现串行光信号的收发。实验结果表明,本文的离轴光纤旋转 连接器在60RPM的转速和1.25Gbit/s的光信号 传输速率下最大插入损 耗为21.73 dB,可以满足旋转系统之间稳定传输光信号的要求。     

应用无线红外技术的光互连器件的设计

旋转连接器是一种自由空间动态光互连器件.文章中利用无线红外技术设计了双通道动态光互连器件,分析了该器件的设计原理,测试了在不同情况下器件的传输速率.实验表明:在不同操作系统的计算机之间测试了该旋转连接器的性能,发现数据传输速率与发射计算机的操作系统和接收计算机的操作系统有关.在同一操作系统下,Win2000操作系统数据传输速率最高,为1.437Mb/s.     

低耦合损耗的光电混合光纤旋转连接器

设计了一种光电混合光纤旋转连接器,能实现相对旋转的光信号在较大对准误差范围内低损耗连接.旋转状态下的自聚焦透镜准直光纤输出的光信号,并由PIN光电探测器将其转换为电信号,冉由激光器根据电信号再生出原始光信号继续在光纤通讯系统中传输.该光电混合光纤旋转连接器在离轴偏移量至520μm或对准倾斜角至0.5°时的附加耦合损耗为0.3 dB,而采用双自聚焦透镜的光纤旋转连接器要获得小于3 dB的插入损耗,其离轴偏移或倾斜角度必须小于100 μm和0.10°相比之下,本文设计的光纤旋转连接器能降低系统对机械加上及装配精度的要求,具有较高的实用价值.     

光纤旋转连接器的最新发展及其应用

光纤旋转连接器经过近30年的发展,技术上已经取得了很大的进步,并趋于成熟。对光纤旋转连接器的主要功能及其最新进展进行了综述,介绍了道威棱镜式、波分复用式和反射镜式3类多通道光纤连接器的原理、技术和特点,对3类系统进行了比较,列出各类连接器的优缺点。最后对光纤旋转连接器适用场合进行了简要介绍。     

混沌信号在色散光纤传输过程中的演化

研究了色散光纤混沌传输理论及混沌信号与色散光纤相互作用的物理机制;通过耦合激光混沌系统和色散光纤传输信道,提出了色散光纤混沌信号传输演化物理模型;提出混沌信号在色散光纤传输中的非线性演化频率啁啾和公式;着重分析光纤色散对激光混沌信号传输与演化的作用,色散能够展宽混沌信号脉冲,但不影响混沌信号的形状;色散能够改变混沌信号每个频谱分量相位,但不影响混沌信号频谱形状;色散能够改变混沌信号光场慢变场分量的变化,但不改变混沌信号包络时变特性,也不影响混沌信号脉冲的功率分布和场强分布;色散能够改变混沌吸引子在相空间整体旋转角度并使其旋转角度随光纤传输长度而发生改变,但不改变混沌吸引子在相空间中的内部结构.最后数值模拟了混沌信号在光纤传输过程中的相位、场慢变部分分量以及混沌吸引子等演化形式等.     

异地综合试验互联网络技术研究

文中以民用飞机电子系统的试验互联体系为例，介绍了一种试验互联网络设计技术。针对在大型复杂电子系统研发过程中，分布式试验设施之间测试信号传输需满足传输时延和品质保真的要求，采用基于光纤互联网络的多电信号适配技术，通过核心部件光纤交换机和信号中继转换装置构建了可级联扩展的试验互联网络体系。根据对原型系统的测试分析表明，在确保信号传输品质的情况下，在500 m传输范围内试验互联网络对典型信号的延时一般不超过60 μs     

光纤旋转连接器在雷达系统中的应用

随着雷达技术的不断发展,光电组合式汇流环将逐步代替传统电汇流环。由于光电组合汇流环在性能上和结构上结合了电汇流环和光纤旋转连接器的优点,如结构坚固、可靠性高、耐恶劣环境、抗电磁辐射、数据传输量大、传输速度快、信号损耗小等,同时减少了系统互连用的电缆数量,所以是雷达信号传输的一个新的发展方向。本文对光纤旋转连接器做了介绍,并和电汇流环进行了对比分析,接着对光纤旋转连接器的安装、光纤旋转连接器雷达信号的传输方案进行了介绍。     

有旋转连接的双层光互连网络设计与分析

设计一个具有旋转连接功能的双层并行光互连网络。顶层为数字路由结点(DRN)和光网络接口卡(ONIC)组成的星型网,吞吐率大于10Gbps;底层为ONIC连接而成的环形网,峰值传输速率1．056Gbps。光纤旋转连接器(FORJ)的引入增加了网络的灵活性和使用范围。该网络的最大吞吐速率为8．448Gbps;环网内平均延迟2195ns,环网间平均延迟4713ns,误码率小于10^-14;结点机之间的链路长度最大可达5．46km。     

Optical fiber interconnection for the scalable parallel computingsystem

In this paper, we discuss the optical fiber interconnection technologies applied in the two types of parallel processing systems: 1) a backplane interconnection in a parallel processor array system and 2) a computing cluster network. We have set up a parallel processor array system using optical fiber to make point-to-point interconnection between processor elements and are developing a low-cost virtual parallel optical fiber interconnection link (VPOFLink) complying with peripheral component interconnect (PCI) local bus specifications for the computing cluster. VPOFLink is integrated with the popular PCI bus interface in order to make the link hold the same bandwidth as that of the PCI bus. It was fabricated as an available peripheral device that can been inserted into the bus slots of commercial computers directly and can operate under the control of PCI bus. Also in this paper, we demonstrate the optical fiber link for a ring network and the architecture of the ring network     

Optoelectronic Package Having Low-Loss Optical Waveguide Hole With Core–Clad Structure for Chip-to-Chip Interconnection

We have developed optoelectronic packages having optical waveguide holes with core–clad structures for chip-to-chip optical interconnection within computer systems. A rate of 10-Gb/s/ch chip-to-chip optical signal transmission has been demonstrated. The optoelectronic package we have developed consists of two guide pins and four-channel optical waveguide holes. The two guide pins are used to align an optical fiber connector with an optical device. The optical waveguide holes are used to transmit optical signals vertically through the optoelectronic package. Using the optical waveguide holes in the optoelectronic package, and high-quality signal transmission has been achieved.      

对称光学结构的双光信道旋连接装置

本文介绍了双光信道旋转连接器的实现方法,提出了实现双信道互连的对称光学系统结构和基于这种光学结构的双光信道旋转连接器。详细分析了这种光学结构的设计原理,并对光路进行了计算和分析,指出了它在中间环节需要旋转耦合连接的仪器设备中的应用前景。     

基于光纤通道的IEEE1394光信号传输系统设计

应IEEE1394同光纤通道总线的互联需求,设计了一种基于光纤通道的IEEE1394光信号传输系统。该系统以基于现场可编程逻辑阵列(FPGA)设计的协议映射模块为核心,实现了将IEEE1394信号通过光纤通道进行传输的功能。仿真结果表明,该系统能达到1.062 5 Gb/s的工作速率。     

双光路全光纤电流互感器的研究

为了使光纤电流互感器具有快速、准确地测量出电流值的能力,本文在分析法拉第电磁感应效应的偏振调制型全光纤电流互感器的基础上引入双光路检测法,将光纤中输出的线偏振光分成振动方向相互垂直、传播方向成一定夹角的两束光。经光信号转换器转换成电信号后系统对其进行放大、滤波处理后得到无噪正弦波信号,结合TMS320F28335测试平台对输出的两路信号进行同步采集、解调,通过运算求出法拉第旋转角,并拟合法拉第旋角与参考电流值得出两者关系式,最终使测量系统能够在高压环境下快速、准确地测量电流值。由此可见,本系统适用于高压环境下对大电流进行检测。     

双光楔可控扫描一维轨迹分析

根据几何光学和光的标量衍射理论,对双光楔的折射特性进行了数学分析.研究发现,以相反旋向相同转速旋转的双光楔对光的折射作用等效于一个折射角随2个光楔转角变化的单光楔.在此基础上,对通过双光楔的光束在像面上的衍射光场分布作了理论分析,得到了在夫琅禾费衍射下,光束经转动双光楔在像平面上的衍射光斑随时间变化的规律,从而为一维扫描的可控操作提供了理论指导.     

并行计算机系统的光WDM互连链路

光波分复用 (WDM)互连接是并行计算机系统克服“电子瓶颈”的可行方案 ,光纤传输的特性可使大容量、低时延、低误码率传输的并行计算机互连成为现实。探讨了并行计算机光WDM互连的一种结构 ,分析研究了其中的关键技术 ,并设计了一个实验系统。分析和实验表明采用光WDM互连可以实现超大容量的并行计算机系统     

入射角度对光器件特性的影响

文中对光信号的入射角度与光器件特性进行了研究。通过实验与理论相结合的方法对波长1550nm传输速率为2．5Gbls的光信号分别以不同入射角度进入型号G652长度为1000KM单模光纤的FA端面所引起的色散以及回波损耗进行了探讨。通过改变激光的入射角度,在输出端得到光信号的总色散系数,同时在输入端得到光信号的回损值。结果表N8度角入射时,光信号在G652单模光纤制作的光纤阵列传输时总色散系数能达到最小,回波损耗值能达到最大,为光通信研究,尤其是大规模推广FTTH光纤到户工程应用起到了重要作用。在光器件研发业务、PLC光器件研磨生产业务以及AWG,DWDM—PON光器件的测试业务等方面奠定了结实的理论基础,对光纤传输、光器件的发展有着积极的促进作用。     

Optical beam direction compensating system for board-to-board freespace optical interconnection in high-capacity ATM switch

In interconnections between bookshelf-assembled asynchronous transfer mode (ATM) switch boards, a large number of micro-optical signal beams can be optically interconnected by a beam direction compensating system using a vertical cavity surface emitting laser, an x-y beam positioning sensor and a beam deflector made of an adjustable liquid prism. This beam direction compensating system can suppress the decrease in coupling efficiency between transmitters and receivers to no more than 15%, even if boards are inserted and extracted repeatedly, and are shocked repeatedly at a high intensity of 100 G. The compensation is very fast (20 ms). Furthermore, various optical interconnections necessary for ATM switching networks can be achieved by beam deflectors of a liquid crystal microprism array. In this preliminary study, we fabricate no more than eight-channel optical interconnections. However, since one surface emitting laser diode can have many channels in a small area (64 channels per 4 mm²) and the aperture of this adjustable liquid prism is wide (28 mm in diameter) and uniform, a huge number of optical interconnection channels is possible using this system     

Confocal Image 3D Surface Measurement with Optical Fiber Plate

A whole-field 3D surface measurement system for semiconductor wafer inspection is described. The system consists of an optical fiber plate, which can split the light beam into N2 subbeams to realize the whole-field inspection. A special prism is used to separate the illumination light and signal light. This setup is characterized by high precision,high speed and simple structure.     

A True Time Delay Beamforming System Incorporating a Wavelength Tunable Optical Phase-Lock Loop

A true time delay (TTD) beamforming system incorporating a wavelength tunable optical phase-lock loop (OPLL) module is proposed and experimentally demonstrated. In the proposed system, instead of using a high-frequency intensity modulator to modulate the optical carrier with an RF signal, we use two laser diodes (LDs) that are phase locked to generate an RF signal, which is then sent to a fiber Bragg grating (FBG) prism to produce different time delays. Since no optical intensity modulator is used, the system can operate at much higher frequencies with a reduced cost. In addition, the use of only two wavelengths eliminates the power-penalty problem caused by chromatic dispersion. In the proposed approach, the wavelengths from the two LDs are phase-locked using a frequency-discriminator-aided OPLL. A TTD beamforming system, using the OPLL in combination with an FBG prism to achieve tunable time delays, is investigated. Experimental time-delay results are provided.