摘要：不少朋友家里都有家庭影院,许多都是一台大屏幕的平板电视,再搭配一个多声道功放以及环绕声音箱,不仅时尚,而且突显了性价比以及操作与安装的方便性。目前国内的许多影音大厂都推出了类似的家庭影院套装产品,而这个套装概念其实一早就在国外出现,而且国外也有不少优质的产品上市,特别是那些可以搭配平板电视使用的器材,要知道现在已经有越来越多的电视频道开通了多声道广播,以后看电视都可以欣赏到多声道的效果了。在扬声器设计与研发领域有着悠久历史的KEF,最近也推出了全新的家庭影院音箱套装,为了配合不同影音环境的需求,还一次过公布了KHT8005、KHT7005、KHT3005SE这三个型号,下面是详细介绍。

摘要：We demonstrate the use of photonic crystal fiber (PCF) joined in between two single mode fibers (SMF) as a concentration sensor. To realize this, one micrometer length PCF of hexagonal lattice is sandwiched between two SMF having one micrometer length each. To maximize the coupling between SMF and PCF, the core diameters are made equal. Then the output from a given input through this structure is analyzed with respect to different concentrations in the air holes of PCF using Finite Difference Time Domain (FDTD) method. It is found that the variation of electric field intensity at the output is linear with respect to concentration of alcohol.