25 Gbit/s无源光网络技术进展和实验研究

高清视频、虚拟现实等新业务的产生以及PON传输5G移动前传和回传信号的需求,要求PON能支持单波超过10 Gbit/s速率的传输.当线路速率超出10 Gbit/s时,色散和功率预算成为限制系统性能的主要因素.介绍了25 Gbit/s PON系统的研究进展和存在的问题,并对采用基于零色散附近的25 Gbit/s速率的EML、分别基于25 Gbit/s和10 Gbit/s速率的APD接收机进行了实验研究.实验结果表明,采用25 Gbit/s速率的APD,EML的发射光功率设置为+5 dBm,在没有光放大器的情况下,可以达到10 Gbit/s对称的吉比特无源光网络的32 dBm的N2级别的光功率预算.     

100Gbit/s技术及应用分析

100Gbit/s已成为目前高速光通信技术的研究焦点。本文分别从发展现状、关键技术、技术应用等方面分别对100Gbit/s进行了分析与探讨,并对100Gbit/s技术的后续发展的展望。     

400 Gbit／s技术及应用探讨

随着400 Gbit／s启动规模商用,400 Gbit/s传输技术成为业界关注热点。本文首先介绍了400 Gbit／s发展背景、400 Gbit／s标准化最新进展,在此基础上详细分析了400 Gbit／s关键技术及方案选择,最后对400 Gbit／s未来应用前景进行了展望。     

对波分复用系统扩容方式的探索

对在原有8/16×2.5 Gbit/s波分复用系统中增加或替换少量10 Git/s波道的扩容技术作了介绍,如波分复用终端设备改造方案,扩容工程所应用的技术及测试项目等。     

Diode multiplexer in the multi-Gbit/s range

A clocked multiplexer circuit was realised which provided 4.48 Gbit/s, 5 Gbit/s, and 7.84 Gbit/s output-pulse streams for p.c.m.-type input tributaries at 1.12 Gbit/s, 0.25 Gbit/s, and 1.12 Gbit/s, respectively. The circuit employed essentially ultra-broadband 180° hybrids, step-recovery diodes, and GaAs Schottky-barrier diodes. Output voltages up to 2 V were obtained across a load of 50 ?. The pulse width of the output pulses was approximately 100 ps.     

1.6 Tbit/s(40×40 Gbit/s)光通信传输系统

在国家自然科学基金网(NSFCNet)上已实现由400 km×10 Gbit/s传输链路直接升级的一路400 km×40 Gbit/s光传输实验的基础上,采用自行研制的40×40 Gbit/s载波抑制归零(CS-RZ)码多波长光发送源,进行了160 km的1.6 Tbit/s(40×40 Gbit/s)波分复用(WDM)光传输实验。实验结果表明,对于常规中短距离10 Gbit/s传输链路可以直接升级至40 Gbit/s。但是由于40 Gbit/s传输系统的色散容限小于60 ps/nm,而且传输光纤与色散补偿模块的色散斜率不匹配,要实现40通道40 Gbit/s的传输,必须对40个信道分别进行精细的色散补偿。这也说明,对于宽带的40 Gbit/s多波长系统,有必要优化设计或更新传输链路。     

支持40 Gbit/s路由器的传输技术研究

本文介绍了核心路由器40 Gbit/s高速接口的优点和传输系统为支持40 Gbit/s路由器所做的努力.例如40 Gbit/s WDM(波分复用)传输技术、40 Gbit/s IMUX(反向复用)技术等.在介绍这些技术的发展现状和优缺点的基础上,本文对40 Gbit/s传输技术的发展进行了预测.     

Applications of single and dual gate GaAs MESFETs for Gbit/s optical data transfer systems

Intrinsic large signal rise and fall times of less than 30 ps without charge storage demonstrate the potential of single and dual gate GaAs MESFETs for Gbit/s optical communication systems. The applications as signal regenerator, bit synchronizer, laser modulator, multiplexer, and demultiplexer are shown. Using only one dual gate GaAs MESFET clock and pulse shape regeneration as well as 1 Gbit/s laser modulation is performed. Bit synchronization is demonstrated up to 4 Gbit/s. 1 to 2 Gbit/s and 2 to 4 Gbit/s multiplexing as well as 2 to 1 Gbit/s demultiplexing with additional clock and pulse shape regeneration is shown using dual gate FETs. 2 to 4 Gbit/s multiplexing without clock regeneration is also accomplished using single gate GaAs MESFETs.     

OTN承载以太网业务方式的探讨

以太网技术的应用正在由局域网延伸到城域网甚至广域网中,相应的以太网带宽也逐渐增加,40 GE/100 GE标准都已在进行讨论.本文首先简单介绍了OTN技术,然后讨论并比较了已有GE/10 GE业务映射到0TN净荷中的可行方式及未来出现的40 GE/100 GE业务映射到OTN净荷中的可能方式.     

40 Gbit/s WDM系统在长途骨干网中的应用

随着业务的爆炸式增长,40 Gbit/s WDM(波分复用)系统已经在现有骨干网中大规模商用。文章分析了40 Gbit/s系统工程建设中的相关问题,包括40 Gbit/s系统的光纤选型、编码选择、40 Gbit/s系统中10 Gbit/s业务的解决方案、40 Gbit/s系统的OLP(光线路保护)和客户端解决方案。     

100Gbit/s 光波分复用系统商用的进一步考虑

Along with the emergence and maturity of 100Gbit/s technologies, numbers of trial and commercial 100Gbit/s Wavelength Division Multiplexing (WDM) systems have been established worldwide. The research- oriented lab tests of 100Gbit/s WDM systems were done by China Unicom in 2012. The 100Gbit/s technologies of polarization multi-plex-quadrature phase shift keying with co-herent detection from multiple vendors have been studied. There are some further issues to be specified before the commercial application of 100Gbit/s WDM system is implemented in large scale in backbone network, including optical performance parameters, optical performance monitoring of 100Gbit/s system, protection mechanism, selection of client interface and comprehensive Operation, Administration and Maintenance (OAM).     

2010年光网络热点及未来展望

2010年,在光通信领域,OTN组网技术、40Gbit/s和100 Gbit/s超高速技术以及10 Gbit/sPON等新兴技术取得了突破性的进展。未来几年,上述技术将继续成为光通信领域的发展重点。     

400Gbit/s光模块的技术浅析

随着IEEE 802.3ba标准的制定完成,100Gbit/s以太网技术已经得到验证并标准化。400Gbit/s以太网和OTN(光传输网)标准成为了下一步人们关注的焦点。文章基于现行100Gbit/s标准,讨论了双载波偏振复用的16QAM(正交幅度调制)、阵列相干探测等以太网和OTN的400Gbit/s光网络模块相关技术。     

10Gbit/s并行光收发模块在万兆以太网的应用

介绍了万兆以太网技术（10 gigabit ethernet technology) . 万兆以太网使用以太网结构实现10Gbit/s点对点传输，距离可达到40km，使以太网的应用从局域网扩展到城域网和广域网. 重点介绍了万兆以太网的功能结构、分层结构、物理传输介质和甚短距离（very short reach）网络传输的并行光传输系统在万兆以太网方面的应用.     

Photonic Technologies for Ultra-High-Speed Information Highways I. 40 Gbit/s TDM Components and Subsystems

The ACTS project HIGHWAY (AC067) addresses promising ultra-high speed optoelectronic components and system technologies for 40 Gbit/s time-division-multiplexed (TDM) transport systems. Advanced 40 Gbit/s TDM system lab demonstrators are to be realized and tested over installed field fiber testbeds. This paper reviews the current status of 40 Gbit/s TDM components and subsystem technologies achieved in HIGHWAY. The results of HIGHWAY 40 Gbit/s TDM systems and field tests will be reported in a subsequent paper.     

40Gbit/s高速光传输技术的应用与挑战

简要分析了40Gbit/s高速光传输技术的发展背景和应用现状 深入分析了对其面临的挑战,例如现网光纤PMD对其传输距离的限制,持续降低成本的挑战,与100Gbit/s的分工和竞争等 最后对其发展进行了展望。     

IP网中40 Gbit/s链路需求解决方案

本文阐述了IP网中40 Gbit/s链路需求的背景,介绍了40 Gbit/s关键技术,提出了IP网中40 Gbit/s链路应用解决方案.     

200Gbit/s PAM4光发射组件封装技术研究

针对200Gbit/s PAM4光收发模块的设计需求,提出了一种基于四阶脉冲幅度调制(PAM4)、数据传输速率达200Gbit/s的光发射组件封装方案。该封装内部集成了4路PAM4电/光转换通道,单通道数据传输速率为50Gbit/s。介绍了该200Gbit/s PAM4光发射组件的组成和技术难点,然后对其中的50Gbit/s数据传输通道进行了建模、仿真和优化,最后完成了样品的测试。测试结果表明:样品的单通道PAM4数据速率可达50Gbit/s,整体PAM4数据速率可达200Gbit/s,满足光收发模块的设计需求。     

2.5Gbit／s SDH系统用光接收模块研究

介绍了２．５Ｇｂｉｔ／ｓＳＤＨ光接收机设计原理，并研制出实用化的高灵敏度，大动态范围的２．５Ｇｂｉｔ／ｓＳＤＨ系统用光接收模块，光接口符合ＩＴＵ－Ｔ建议，Ｇ．９５７规范的要求，该模块已用于武汉邮电科学研究辽研制的２．５Ｇｂｉｔ／ｓＳＤＨ光传输系统中。     

160 Gbit/s full optical time-division demultiplexing using FWM ofSOA-array integrated on PLC

160 Gbit/s full time-division demultiplexing using a semiconductor optical amplifier hybrid integrated demultiplexer on a planar lightwave circuit is demonstrated. Error-free, demultiplexing from a 160 Gbit/s signal to eight-channel, 20 Gbit/s signals is successfully demonstrated