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将在时间和空间上为高斯型的超短脉冲分解成不同时间频率的高斯光束．详细地分析了其远场由于时空耦合引起的光谱频移、波前弯曲等复杂的时空特征。
The time and space Gaussian ultrashort pulses are decomposed into Gaussian beams with different time and frequency. The complicated spatio-temporal features such as spectral shift and wavefront bending caused by the far-field coupling are analyzed in detail.