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We have studied
the asymmetric behavior of the polarization beats in a four-level system when the pump
beams have either narrowband or broadband linewidth, we attribute this asymmetry to the
shift of the zero time delay which is due to the dispersion of the optical components. 相似文献
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采用多量子阱器件的无线光通信差拍接收方案研究 总被引:2,自引:0,他引:2
研究一种采用光折变多量子阱器件的无线光通信自差拍接收方案。与寻常相干接收方案相比,省去了中频跟踪电子系统;与量子阱器件零拍方案相比,采用中频窄带滤波器,提高了接收端机的输出信噪比。理论上研究了自差拍相干接收方案,从其物理机制出发,结合信噪比分析,探讨了影响相干接收方案的主要因素。建立了该方案的实验系统,并开展了有意义的实验研究。理论分析及实验结果表明,该方案对激光大气传输所引起的诸多不利影响皆有一定的抑制作用,因而有可能应用于卫星地面激光通信和地面无线光通信系统。 相似文献
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Energy Quantization and Probability Density of Electron in Intense-Field-Atom Interactions 下载免费PDF全文
We find that, due to the quantum correlation between the electron and the field, the electronic energy becomes quantized also, manifesting the particle aspect of light in the electron-light interaction. The probability amplitude of finding electron with a given energy is given by a generalized Bessel function, which can be represented as a coherent superposition of contributions from a few electronic quantum trajectories. This concept is illustrated by comparing the spectral density of the electron with the laser assisted recombination spectrum. 相似文献
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