Generation of a single-cycle pulse using a two-stage compressor and its temporal characterization using a tunnelling ionization method

Hwang, Sung In; Park, Seung Beom; Mun, Je Hoi; Cho, Wosik; Nam, Chang Hee; Kim, Kyung Taec

doi:10.1038/s41598-018-38220-z

Cited by 26 publications

(24 citation statements)

References 33 publications

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“…However, the experimental verification of the applicability for a broad wavelength range has not been demonstrated. TIPTOE has been tested only for single-cycle and few-cycle laser pulses in the wavelength range of 400–1000 nm 16,17 .…”

Section: Introductionmentioning

confidence: 99%

Temporal characterization of femtosecond laser pulses using tunneling ionization in the UV, visible, and mid-IR ranges

Cho

Hwang

Nam

et al. 2019

Sci Rep

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To generalize the applicability of the temporal characterization technique called “tunneling ionization with a perturbation for the time-domain observation of an electric field” (TIPTOE), the technique is examined in the multicycle regime over a broad wavelength range, from the UV to the IR range. The technique is rigorously analyzed first by solving the time-dependent Schrödinger equation. Then, experimental verification is demonstrated over an almost 5-octave wavelength range at 266, 1800, 4000 and 8000 nm by utilizing the same nonlinear medium – air. The experimentally obtained dispersion values of the materials used for the dispersion control show very good agreement with the ones calculated using the material dispersion data and the pulse duration results obtained for 1800 and 4000 nm agree well with the frequency-resolved optical gating measurements. The universality of TIPTOE arises from its phase-matching-free nature and its unprecedented broadband operation range.

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Section: Introductionmentioning

confidence: 99%

Temporal characterization of femtosecond laser pulses using tunneling ionization in the UV, visible, and mid-IR ranges

Cho

Hwang

Nam

et al. 2019

Sci Rep

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“…In addition, the absolute pump-probe time at the interaction point in the experiment, determined through a specific timing tool in SFX experiments, carries an uncertainty of 30-50 fs [64][65][66]. Development of hollow core fibers for ultrafast laser pulse generation [67][68][69] has enabled production of single-cycle pulses, with a duration of only a few femtoseconds, or attosecond half-cycle pulses [47,[70][71][72] that have also been used for ultrafast pump-probe spectroscopy experiments [73,74]. The implementation of such pulses in pumping sample at SFX experiments would improve the earliest observable time point after excitation.…”

Section: Discussionmentioning

confidence: 99%

Applications and Limits of Time-to-Energy Mapping of Protein Crystal Diffraction Using Energy-Chirped Polychromatic XFEL Pulses

et al. 2020

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A broadband energy-chirped hard X-ray pulse has been demonstrated at the SwissFEL (free electron laser) with up to 4% bandwidth. We consider the characteristic parameters for analyzing the time dependence of stationary protein diffraction with energy-chirped pulses. Depending on crystal mosaic spread, convergence, and recordable resolution, individual reflections are expected to spend at least ≈ 50 attoseconds and up to ≈ 8 femtoseconds in reflecting condition. Using parameters for a chirped XFEL pulse obtained from simulations of 4% bandwidth conditions, ray-tracing simulations have been carried out to demonstrate the temporal streaking across individual reflections and resolution ranges for protein crystal diffraction. Simulations performed at a higher chirp (10%) emphasize the importance of chirp magnitude that would allow increased observation statistics for the temporal separation of individual reflections for merging and structure determination. Finally, we consider the fundamental limitation for obtaining time-dependent observations using chirped pulse diffraction. We consider the maximum theoretical time resolution achievable to be on the order of 50–200 as from the instantaneous bandwidth of the chirped SASE pulse. We then assess the ability to propagate ultrafast optical pulses for pump-probe cross-correlation under characteristic conditions of material dispersion; in this regard, the limiting factors for time resolution scale with crystal thickness. Crystals that are below a few microns in size will be necessary for subfemtosecond time resolution.

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“…A novel approach called tunneling ionization with a perturbation for the time-domain observation of an electric-eld (TIPTOE) was recently demonstrated [9][10][11][12][13] . Unlike the conventional techniques, the TIPTOE method utilizes the extreme nonlinearity of ionization.…”

Section: Introductionmentioning

confidence: 99%

Reconstruction algorithm for tunneling ionization with a perturbation for the time-domain observation of an electric-field

Cho

Shin

Kim

2021

Preprint

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We present a reconstruction algorithm developed for the temporal characterization method called tunneling ionization with a perturbation for the time-domain observation of an electric field (TIPTOE). The reconstruction algorithm considers the high-order contribution of an additional laser pulse to ionization, enabling the use of an intense additional laser pulse. Therefore, the signal-to-noise ratio of the TIPTOE measurement is improved by at least one order of magnitude compared to the first-order approximation. In addition, the high-order contribution provides additional information regarding the pulse envelope. The reconstruction algorithm was tested with ionization yields obtained by solving the time-dependent Schrödinger equation. The optimal conditions for accurate reconstruction were analyzed. The reconstruction algorithm was also tested using experimental data obtained using few-cycle laser pulses. The reconstructed pulses obtained under different dispersion conditions exhibited good consistency. These results confirmed the validity and accuracy of the reconstruction process.

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Generation of a single-cycle pulse using a two-stage compressor and its temporal characterization using a tunnelling ionization method

Cited by 26 publications

References 33 publications

Temporal characterization of femtosecond laser pulses using tunneling ionization in the UV, visible, and mid-IR ranges

Temporal characterization of femtosecond laser pulses using tunneling ionization in the UV, visible, and mid-IR ranges

Applications and Limits of Time-to-Energy Mapping of Protein Crystal Diffraction Using Energy-Chirped Polychromatic XFEL Pulses

Reconstruction algorithm for tunneling ionization with a perturbation for the time-domain observation of an electric-field

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