40 Gbit/s长途WDM系统及其应用前景

40Gbit/s波分复用(WDM)系统是未来技术发展的方向，也是目前技术研究的热点。本将首先分析40Gbit／sWDM系统所面临的关键技术问题，然后介绍美国PhotonEx公司已经商用化的40Gbit／s WDM系统及其主要技术特点，最后提出40Gbit/s WDM在我国的应用前景，包括应用场合及实现步骤等。     

飞秒白光超连续光谱及其频率选择

飞秒白光超连续光谱及其频率选择章若冰，程保，赵应侨，张伟力，王清月（天津大学精仪系，天津３０００７２）本文利用用蒸气泵浦的飞秒染料激光放大器产生了稳定的飞秒白光超连续谱，其超连续谱的范围从紫外一直到红外，超连续谱的泵浦光阈值低于１Ｗ。其实验装置由飞秒...     

高速光通信系统中的色散及其补偿技术

分析了高速光通信系统中色度色散和偏振模色散的影响，并对有关的色散补偿技术作了较详细的介绍。     

Influence of landfill structures on stabilization of fully recycled leachate

1 INTRODUCTIONWith rapid development of urbanization andpopulation growth, solid waste disposal has be-come extremely i mportant to i mprove the urbanenvironment[1]. Nowadays ,sanitary landfill is themost popularly adopted to dispose municipal solidwaste . However ,there exist some problems ,suchas large area of land occupied, pollution fromtheleachate and landfill gas , of which the leachate isone of the main reasons for the environmental pol-lution of the landfill[2]. Due to being compl…