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.     

激光显示业期望新光源

在饱受经济萧条之苦后，激光业正翘首期望激光显示市场的繁荣。虽然美国很多一流的激光显示公司已离开这个行业，但从2003年国际激光显示会议上却不难看出这一行业已出现复苏迹象。     

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’…     

DV夜景拍摄技巧

城市的夜仿佛比白天更具有活力，闪烁的霓虹、游走的人群、移动的车流、各种建筑的灯光等等，这一切组成城市美丽的夜景。要想用DV记录下这些夜景，却不是那么容易的事情，这一方面是由于DV本身的特性所决定，所拍摄的和我们所看到还是有一定的差别。因此，用DV拍摄夜景不同于白天拍摄，需要使用更多的技巧，这样才能留住这些美丽的瞬间。