共查询到16条相似文献,搜索用时 93 毫秒
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通过分析体全息光栅的读取过程,得到光折变晶体CuKNSBN的光电导在入射光强为5×104W/m2时的典型值为σph=3.01×10-10 A·m-2.实验得到光电导与入射光强是指数约为b=0.8的亚线性关系,从而得到满陷阱与空陷阱之密度比的定量表示式为(CCu+/CCu2+)=αIb-1.在观测的波长范围内,b随着波长缩短而增大. 相似文献
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BSO晶体的特性及其应用 总被引:2,自引:0,他引:2
本文概要地综述了Bi_(12)SiO_(20)(BSO)晶体的主要物理特性以及近几年来在实时全息术、斑纹干涉计量、光学信息处理等方面的应用和作者的一些实验结果。 相似文献
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The coupled-wave theory is extended to analyze the two-wave mixing interaction under an alternating electric field in a sillenite crystal. Within the undepleted pump beam approximation, an analytical expression which allows prediction of the phase, the polarization state, and the amplitude of the amplified beam is derived. It is shown that all these features usually oscillate. These predictions are confirmed by experiments 相似文献
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《Electron Devices, IEEE Transactions on》1984,31(1):101-104
The observed independence of mobility on surface conditions in InP:Fe fast photoconductivity devices is explained by inclusion of the Dember electric field resulting from unequal electron and hole mobilities. From the calculated electron-concentration distribution as a function of the distance normal to the device surface, we determine that the mean position of the electron concentration in InP lies more than one standard deviation below the surface for laser excitation of 780 nm and a high-injection ambipolar surface recombination velocity of 106cm/s. Results are presented for InP:Fe as a function of surface recombination velocity, and related results are presented for Si and for a material with equal hole and electron mobilities. 相似文献
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通过专用无源互调分析仪对微带传输线的无源互调(Passive Intermodulation,PIM)效应进行了初步实验研究. 在不同微波介质基材上设计并加工了特征阻抗为50 Ω的不同长度的微带传输线,通过专用无源互调分析仪进行PIM测试. 实验结果表明:输入载波功率每增加1 dB,三阶PIM产物功率增加约2.7 dB;三阶PIM产物有随载波频率增加而减小的趋势;微带传输线越长,则PIM产物功率越大;微波介质材料对PIM产物也有一定影响. 所得实验规律对高性能微波集成电路设计具有借鉴意义. 相似文献
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为了给空间光通信的瞄准捕获跟踪链路的设计提供参考,实验研究了强湍流区的大气闪烁时间平滑效应,并考虑大气闪烁和瞄准抖动误差,分析了空间光通信的跟瞄链路的强度起伏统计规律;在此基础上,分析了时间平滑对链路衰落起伏的改善作用.实验研究结果表明,随着曝光时间的增加,强湍流区的大气闪烁起伏幅度减小,当曝光时间达到几十毫秒时,强湍流区的大气闪烁起伏服从对数正态分布;在确保空间光通信系统的链路跟踪中断概率小于10-3以下,采用时间平滑可以使所需的衰落冗余减少15dB~20dB. 相似文献