Bit error rate performance for wavelength conversion at 20 Gbit/s

Wavelength conversion at 20 Gbit/s, to longer and shorter wavelength, is achieved using cross gain-compression in a semiconductor optical amplifier. Quantitative performance is assessed from the bit error rate data at 20 Gbit/s, for the first time for any wavelength conversion scheme. For conversion of 10 nm to a shorter wavelength, the penalty is 2.6 dB     

Bit error rate measurements of 14000 km 5 Gbit/s fibre-amplifier transmission system using circulating loop

An experimental technique was developed for measuring bit error rates in multi-thousand kilometre fibre amplifier systems using a circulating loop. A transmission distance of 14300 km at 5 Gbit/s and 21000 km at 2.4 Gbit/s was achieved using a nonreturn-to-zero pseudorandom data pattern. The bit rate distance product of the 5 Gbit/s result was 71 Tbit km/s.<>     

Experimental demonstration of 2.5 Gbit/s transmission with 1 mpolymer optical backplane

An optical backplane for high-speed data transmission was experimentally examined. The transmission of 2.5 Gbit/s per channel over a 1 m multimode polymer waveguide is demonstrated     

2.5Gb/s SDH/SONET指针处理器芯片实现

提出了一种2.5Gb/s同步光纤网络SDH/SONET中指针处理器芯片实现结构.指针处理器执行指针解释、通路开销性能监测功能,产生新的与系统时钟同步的STM/STS帧.指针解释模块对输入STM/STS通道的H1/H2指针进行解释,支持48通道的指针解释和每个通道的通路开销监测.采用4路总线流水线结构,77.76MHz的系统时钟,即可实时处理2.5Gb/s的SDH/SONET数据.采用TSMC 0.13μm工艺流片,技术指标符合ITU-T标准.     

2.5Gb/s SDH/SONET通路终结芯片设计

设计了一种2.5Gb/s同步光纤网络SDH/SONET中通路终结处理器芯片.采用双向4路总线流水线结构,77.76MHz的系统时钟,可实时处理2.5Gb/s的SDH/SONET数据,终结处理后输出TUG-3/VTG信号.包括通道告警、信号失效检测、性能监测和通道跟踪等.支持STS-48/STM-16、4路STS-12/STM-4和4路STS-3/STM-1的处理.     

Monolithic demodulator for high sensitivity 2.5 Gbit/s CPFSKreceiver

A completely monolithic quadrature demodulator for an optical heterodyne CPFSK receiver is reported for the first time. The demodulator is realised as a GaAs MMIC and operates up to 2.5 Gbit/s at an intermediate frequency of 9.8 GHz, yielding a receiver sensitivity of -42.5 dBm     

2.5Gb/s SDH/SONET传送开销处理器芯片实现

设计了一种2.5Gb/s同步光纤网络SDH/SONET中传送开销处理器芯片.采用双向4路总线流水线结构,77.76MHz的系统时钟,即可实时处理2.5Gb/s的SDH/SONET数据.支持STM-16、4路STM-4和STM-1的再生段开销和复用段开销处理以及STS-48、4路STS-12和STS-3的段开销和线路开销处理.采用TSMC 0.13μm工艺流片,电路规模约48万门,技术指标符合ITU-T标准.     

2.5 Gb/s SDH/SONET低阶支路处理器芯片设计

设计了2.5 6b/s SDH/SONET的低阶支路处理器芯片,单片实现STS-48/STM-16的低阶支路终结,包括低阶容器的通道监控,混合VT1.5/TU-11和VT2/TU-12容器的终结,V1/V2指针解释,虚级联数据的提取,开销字节的提取和处理,BIP-2检测,RDI/REI在发送方向的环回,VT/TU级的保护倒换等.采用TSMC 0.13 μm CMOS工艺流片成功,电路规模约12.6万门.满足光纤通信传输要求,并成功用于光纤通信设备.     

2.5 Gbit/s multifunctional CMOS transceiver for chip-to-chip optical link

A novel multifunctional transceiver for chip-to-chip optical interconnects operating at 2.5 Gbit/s is proposed, which shares a common block between a receiver and a transmitter. This transceiver provides four conversion functions - electrical-to-optical, optical-to-optical, optical-to-electrical, and electrical-to-electrical - depending on the selection switch on a single chip. The whole chip integrated in 0.18 /spl mu/m CMOS occupies an area measuring 0.82/spl times/0.82 mm/sup 2/.     

Over 300 km CPFSK transmission experiment using 67 photon/bit sensitivity receiver at 2.5 Gbit/s

A nonrepeated fibre transmission experiment over 308 km of conventional optical fibre is reported at 2.5 Gbit/s in a CPFSK heterodyne detection system. The system has a sensitivity of -46.7 dBm or 67 photons/bit at 10/sup -9/ BER and has the maximum allowable attenuation of 55.1 dB without an optical amplifier.<>     

2.5 Gbit/s transmission of spectrum-sliced fibre amplifier lightsource channels over 200 km of dispersion-shifted fibre

Transmission of 2.5 Gbit/s spectrum-sliced fibre amplifier light source channels over 200 km of dispersion-shifted fibre (DSF) has been achieved, the highest bit-rate distance product 500 Gbit/s km using incoherent light sources reported to our knowledge. The total power penalty was as low as 0.2 dB for the 1.8 nm bandwidth channel centred at the zero-dispersion wavelength of DSF     

G.652光纤上的2.5Gbit／s色散受限系统

本文根据色散受限中继段长度的计算，对实际工程中１５５０ｎｍ波长２．５Ｇｂｉｔ／ｓ系统进行计算比较得出啁啾声引起的色散不容忽视，它使２．５Ｇｂｉｔ／ｓ成为色散受限系统。对１３１０ｎｍ波长６２２Ｍｂｉｔ／ｓ系统，当使用多纵模激光器时，往往也会成为色散受限系统。     

WDM光传输系统2.5Gbit／s光发送模块研究

本文介绍了作者设计，调试的２．５Ｇｂｉｔ／ｓ光发送模块的工作原理、关键技术、典型性能参数，该模块通过控制激光器温度来稳定其中心波长，为波分复用系统的应用提供了具备稳定中心波长特性的光源。     

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。     

Over 350 km CPFSK repeaterless transmission at 2.5 Gbit/s employing high-output power erbium-doped fibre amplifiers

A 351.4 km CPFSK repeaterless transmission at 2.5 Gbit/s is described, which uses a newly developed post amplifier consisting of two erbium-doped fibres. Amplifier output power of +18.8 dBm and a maximum allowable attenuation as high as 63.8 dB in the optical link were achieved.<>     

2 Gbit/s and 2.4 Gbit/s optical transmission field trial over a 32 km installed route

High-speed optical data transmission at 2Gbit/s and 2.4 Gbit/s has been demonstrated for the first time over an installed fibre-optic cable. Error-free transmission with operating margins of 15.8 dB and 12 dB over 10?9 BER was achieved over a 32 km route. The systems featured a 1.5 ?m DFB laser, Ge APD transimpedance receivers and full regeneration.     

3711 km, 4×2.5 Gbit/s WDM transmission over installed RIOJAsubmarine cable system

WDM transmission over a 3711 km installed optically amplified submarine cable system is reported. They also show the implication of varying the repeater output power by means of a proprietary supervisory system resulting in optimised system performance     

2.5 Gbit/s, 10073 km straight line transmission system experiment using 199 Er-doped fibre amplifiers

A 2.5 Gbit/s, 50 km span straight line transmission over 10000 km using 199 Er-doped fibre amplifiers was successfully demonstrated. The simultaneous transmission of supervisory control and response signals was also confirmed.<>     

2.5 Gbit/s光孤子的产生及外调制

采用半导体的增益开关法成功地产生了２．５Ｇｂｉｔ／ｓ的孤子光脉冲并对其进行了外调制。对经过调制的孤子光脉冲进行了检测，分析了实验原理及结果。