爱立信支持南方电网构建光纤骨干网

近日，爱立信被南方电网选中建设其“十一五”黔电送粤500kV交流输变电工程配套的施秉至贤令山输变电光纤通信工程，以及滇南外送通道500kV交流输变电工程配套的光纤通信工程，为以上两个工程提供2．5Gbit／s光传输设备OMS1684，构建跨越云南、贵州、广东、广西四省的骨干传输网，总传输距离达5000余公里。目前这两个工程已经进入实施阶段，预计将于今年六月底完工。     

佛山市南海讯联信息有限公司——FTTH室内光缆

产品特点： 特种弯曲光纤，提供更大的带宽，增强网络传输特性； 两根平行FRP使光缆具有良好的抗压性能，保护光纤； 光缆结构简单，重量轻，实用性强； 独特的凹槽设计，易剥离，方便连续，简化安装和     

高精度快速可控光纤真延迟线实验研究

在相控阵雷达中使用光纤实时延迟技术,可实现大角度瞬时宽带扫描.利用半导体光放大器和法拉第旋转镜实现了快速切换的延迟线,此技术具有切换速度快,延迟精度高,输出功率恒定,偏振不相关等优点.实验结果表明,此结构能够实现1 ps的延时精度,误差不超过0.1 ps.     

TerraTec的“费斯”与“火龙”

TerraTec(德国坦克)最新推出的Phase(费斯)22是一款在功能上与MAYA44 Pro类似的专业音频产品，与MAYA44 Pro的相同之处是支持24bit／96kHz的音频回放，而且它们都带有S／PDIF输出接口。与MAYA44 Pro不同的是：Phase22带有24bit／l92kHz的音频输入、MIDI／O接口和S／PDIF输入接口，而MAYA44Pro要实现同样的功能则需要单独购买子卡；在输入/输出通道方面，Phase22是两进两出，而MAYA44 Pro支持四进四出，同时还带有光纤输出接口，而Phase22是不带的。     

MAYA44Pro高性价比专业音频接口

适台预算紧张的小型个人录音棚使用的MAYA44 Pro“一专多能”，它除了拥有24bit／96kHz的专业音频处理性能外，还拥有耳机功放，支持专业电容麦克风的12V幻象供电，除此之外还具有数字同轴和光纤输出接口，能满足入门级专业用户的全方位需要。     

工业用高功率光纤激光器

IPG光子日本株式会社现已开始出售IPG集团的各种型号工业用高功率光纤激光器。     

Distributed Optical Fiber Sensor for Multi-point Temperature Measurement

The distributed optical fiber sensing technology is overviewed, which is based on Raman scattering light theory. Basic operation principle, structure, system characteristics and signal processing are discussed. This structure and method of the signal processing possess of certain spatial resolution, hence will ensure the practicability of system.     

Experimental Research on Erbium-doped Superfluorescent Fiber Source

The effects of the variations in fiber length, fiber mirror reflectance on efficiency and output power are experimentally investigated for erbium-doped double pass backward superfluorescent fiber sources (SFSs). The influence of fiber length on mean wavelength stability (MWS) has also been demonstrated. By incorporating a short section of un-pumped erbium-doped fiber (EDF) at the output port, the pump power dependent on MWS becomes independent of pumped EDF length. This is a novel phenomenon that hasn‘t been reported up to now,and should be helpful to SFS fabrication and theory analysis. By using a fiber Michelson interferometer as spectrum slicing component,a multi-wavelength fiber source (MWFS) with ～20 channels (from 1542nm to 1559nm) is got. The MWFS has a channel spacing of ～0. 8 nm which satisfies ITUstandard. The intensity fluctuation among channels is less than 0.5dB,and the extinction ratio of all channels is above 14dB. This kind of MWFS should be useful to wavelength division multiplexing systems.     

激光技术与应用

工〔日〕住泽弘明侧闷7a卜口二夕又一加04,23(4)一131~136 2004060492微细加工用固体激光器=微捆加工用固体卜一了〔日)汕崎逮三彻.70卜口三夕又一2004,23(4)一137一140 2004060493工业用固体激光器的现状=产案用固体卜一廿刃现状〔日〕邓,屋辉座拐‘7o卜口二夕又一加04,23(4)一148一151 2004060494激光加工在重工业领域中的应用二重工案分野忆招汁石卜一廿加工刃通用(日〕石出孝均.7a卜口二夕又一2004,23(4)一153一159 2004060495利用激光产生等离子体的下一代光刻真空紫外乡丈?奋用协赴下次世代 2004060487用激光制作碳纳米管=卜一廿了7’…