In order to study the methods to enhance the efficacy of electrodeless lamp,volt-ampere characteristics,illuminance and emission spectrum have been investigated in home-built electrodeless lamp experimental system wit...In order to study the methods to enhance the efficacy of electrodeless lamp,volt-ampere characteristics,illuminance and emission spectrum have been investigated in home-built electrodeless lamp experimental system with an electrodeless lamp in shape like QL 85 lamp.The results show that lamp current increases as lamp voltage increases in non-discharge,the current decreases first and then increases as the voltage increases in discharge.The illuminance of electrodeless lamp increases linearly with discharge power increasing,and it decreases linearly with power decreasing.The emission spectrum is different for different bulb and lighting time.The spectrum of Ar 811.5 nm,76.5 nm,750.4 nm and Hg 313.2 nm decrease with lighting time.While the intensity of Hg 407.8 nm increases with lighting time.展开更多
The laset of Er^(3+)ion has had people’s attention because of its excellent properties and application.So we grew out crystal of ZnWO_(4):Er and measured its absorption,excitation and emission spectra.We can see from...The laset of Er^(3+)ion has had people’s attention because of its excellent properties and application.So we grew out crystal of ZnWO_(4):Er and measured its absorption,excitation and emission spectra.We can see from the absorption spectrum that the absorption of Erion in ZnWO_(4)crystal centers on two bands with peaks at 379nm and 522nm wavelength resPectively,for which the excitation light energy can be absorbed effectively.展开更多
基金Project Supported by National Natural Science Foundation of China(50477005)China Postdoctoral Science Foundation (20100480255)Basic Research Foundation of Tsinghua University(JCpy2005053,20092000399,20102000442)
文摘In order to study the methods to enhance the efficacy of electrodeless lamp,volt-ampere characteristics,illuminance and emission spectrum have been investigated in home-built electrodeless lamp experimental system with an electrodeless lamp in shape like QL 85 lamp.The results show that lamp current increases as lamp voltage increases in non-discharge,the current decreases first and then increases as the voltage increases in discharge.The illuminance of electrodeless lamp increases linearly with discharge power increasing,and it decreases linearly with power decreasing.The emission spectrum is different for different bulb and lighting time.The spectrum of Ar 811.5 nm,76.5 nm,750.4 nm and Hg 313.2 nm decrease with lighting time.While the intensity of Hg 407.8 nm increases with lighting time.
文摘The laset of Er^(3+)ion has had people’s attention because of its excellent properties and application.So we grew out crystal of ZnWO_(4):Er and measured its absorption,excitation and emission spectra.We can see from the absorption spectrum that the absorption of Erion in ZnWO_(4)crystal centers on two bands with peaks at 379nm and 522nm wavelength resPectively,for which the excitation light energy can be absorbed effectively.
