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All-optical frequency-resolved optical gating for isolated attosecond pulse reconstruction
Optics Letters ( IF 3.866 ) Pub Date : 2020-01-13 , DOI: 10.1364/ol.381188
Zhen Yang, Wei Cao, Xi Chen, Jie Zhang, Yunlong Mo, Huiyao Xu, Kang Mi, Qingbin Zhang, Pengfei Lan, and Peixiang Lu

We demonstrate an all-optical approach for precise characterization of attosecond extreme ultraviolet pulses. An isolated attosecond pulse is produced from high-order harmonics using an intense driving pulse with a proper gating technique. When a weak field is synchronized with the driver, it perturbs the harmonics generation process via altering the accumulated phase of the electron trajectories. The perturbed harmonic spectrum can be formulated as a convolution of the unperturbed dipole and a phase gate, implying the validity of complete reconstruction of isolated attosecond pulses using a conventional frequency-resolved optical gating method. This in situ measurement avoids the central momentum approximation assumed in the widely used attosecond streaking measurement, providing a simple and reliable metrology for an isolated attosecond pulse.
更新日期:2020-01-15

 

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