常見例句雙語例句The pulse envelope we obtained is a hyperbolic secant function of time.所得脈沖包絡(luò)為時間的雙曲正割函數(shù)。With the development of few-cycle pulses (FCP), the phase shift of the optical carrier with respect to the pulse envelope becomes non-negligible.在本文中，我們從幾周期脈沖的載波相位出發(fā)，對超短光脈沖的一些基本問題進行了探討。And a theoretical model is established to expound the variation of pulse duration and the modulation on the pulse envelope similar to the diffraction characteristics in spatial domain.通過與光束的空間傳輸特性類比解析了光欄寬度變化引起的脈寬變化以及脈沖輪廓出現(xiàn)時間衍射調(diào)制現(xiàn)象； 返回 pulse envelope