摘要:
对偶极子光导天线空间功率合成中时间延迟的影响进行了分析。利用太赫兹时域光谱技术分别获取了34, 500, 1000 m偶极子光导天线的太赫兹时域光谱。采用数值模拟方法分析时间延迟对空间功率合成的影响。结果发现:在满足空间功率合成时域相干度60%的条件下，两个34, 500, 1000 m偶极子光导天线阵列的相对最大时间延迟分别为350.7, 467.6, 450.9 fs；三个34, 500, 1000 m偶极子光导天线阵列的相对最大时间延迟分别为191.1, 250.5, 267.2 fs；四个34, 500, 1000 m偶极子光导天线阵列的相对最大时间延迟分别为167, 200.4, 217.1 fs。试验结果表明，空间功率合成数值模拟仿真能为偶极子光导天线阵列的物理实验提供重要依据。
Abstract:
Time delay effect on optical dipole antennas space power synthesis is analyzed. Utilizing terahertz time-domain spectroscopy, we obtain terahertz time-domain spectrogram of 34, 500 and 1000 m optical dipole antenna separately. The time delay effect on space power synthesis is studied in numerical simulation. The result shows that, in the condition of 60% space power synthesis efficiency, the relatively biggest time delay of two arrays of 34, 500 and 1000 m optical dipole antenna is 350.7, 467.6, 450.9 fs, respectively, that for three arrays is 191.1, 250.5, 267.2 fs, respectively, and that for four arrays is 167, 200.4, 217.1 fs, respectively. The numerical simulation of space power synthesis can provide important basis for physical experiment of optical dipole antenna arrays.
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