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当脉冲宽度可与光学振荡周期比拟时,超短脉冲将会呈现出很多新的性质.利用数值模拟的方法研究了超短辛格高斯脉冲的脉冲能量和脉冲的时间重心.结果表明:超短辛格高斯脉冲的能量和脉冲时间重心将会在很大程度上依赖于绝对相位的变化.绝对相位分别为nπ,(2n+π)/2时,脉冲能量达到最大和最小值;绝对相位为(2n+π)/4时,脉冲能量不会改变;绝对相位分别为(4n+3π)/4,(4n+π)/4时,脉冲时间重心的漂移达到最大和最小值;绝对相位为nπ/2时,脉冲时间重心不发生漂移.
When the pulse width can be compared with the period of optical oscillation, the ultrashort pulse will show a lot of new properties. The pulse energy and pulse center of gravity of the ultrashigh SinghGaussian pulse are studied by numerical simulation. The results show that ultrashort pulse The energy and the center of gravity of the Singh-Gaussian pulse will depend strongly on the change of absolute phase, with the maximum and minimum pulse energies at the absolute phase of nπ, (2n + π) / 2, respectively; the absolute phase is (4n + 3π) / 4, (4n + π) / 4, the drift of the center of gravity of the pulse time reaches the maximum and the minimum; the absolute phase is nπ / 2, the pulse center of gravity does not drift.