Author Affiliations
Abstract
1 Department of Physics, Shanghai University, Shanghai 200444, China
2 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
3 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
An all-reflective self-referenced spectral interferometry based on the transient grating (TG) effect is proposed for single-shot measuring of the amplitude and phase of ultrashort pulses in a broadband spectral range. Except for a thin third-order nonlinear medium, which was used to generate the TG signal, no transmitted optics were used in the proposed device, and few-cycle pulses in a broad spectral range from deep UV to mid-IR can be characterized. With a homemade compact and alignment-free device, a 5.0 fs pulse at 800 nm corresponding to about two cycles and a 14.3 fs pulse at 1800 nm corresponding to less than three cycles were successfully characterized.
transient grating self-referenced spectral interferometry few-cycle laser pulses femtosecond laser pulses measurement Chinese Optics Letters
2020, 18(2): 021202
采用全量子非微扰散射理论,研究了周期量级微波频率激光脉冲中高激发里德堡态铷原子光电离的 不对称现象。发现了光电子角分布的不对称性,这一不对称性由电离过程中不同跃迁通道之间的干涉引起。 讨论了光电子角分布的不对称性对载波-包络(Carrier-envelope, CE)相位、脉冲宽度及光电子能量的依赖性,发现光电子角分布的不对称性随CE相位、脉冲宽度及光电子能量的 变化有显著变化。这一研究证实了最近的实验观测,为微波频率光学范畴内CE相位的测量及光电子角分布的控制提 供了一种有效的方法。
光谱学 光电离 非微扰全量子散射理论 周期量级激光脉冲 spectroscopy photoionization nonperturbative quantum scattering theory few-cycle laser pulses
