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  • Cambridge University Press (CUP)  (4)
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  • Cambridge University Press (CUP)  (4)
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  • 1
    Online Resource
    Online Resource
    Timing fluctuation correction for the front end of a 100-PW laser
    Cambridge University Press (CUP) ; 2023
    In:  High Power Laser Science and Engineering Vol. 11 ( 2023)
    Details
    In: High Power Laser Science and Engineering, Cambridge University Press (CUP), Vol. 11 ( 2023)
    Abstract: The development of high-intensity ultrafast laser facilities provides the possibility to create novel physical phenomena and matter states. The timing fluctuation of the laser pulses is crucial for pump–probe experiments, which is one of the vital means to observe the ultrafast dynamics driven by intense laser pulses. In this paper, we demonstrate the timing fluctuation characterization and control of the front end of a 100-PW laser that is composed of a high-contrast optical parametric amplifier (seed) and a 200-TW optical parametric chirped pulse amplifier (preamplifier). By combining the timing jitter measurement with a feedback system, the laser seed and preamplifier are synchronized to the reference with timing fluctuations of 1.82 and 4.48 fs, respectively. The timing system will be a key prerequisite for the stable operation of 100-PW laser facilities and provide the basis for potential pump–probe experiments performed on the laser.
    Type of Medium: Online Resource
    ISSN: 2095-4719 , 2052-3289
    URL: Article
    DOI: 10.1017/hpl.2023.41
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2023
    detail.hit.zdb_id: 2723155-0
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  • 2
    Online Resource
    Online Resource
    The laser beamline in SULF facility
    Cambridge University Press (CUP) ; 2020
    In:  High Power Laser Science and Engineering Vol. 8 ( 2020)
    Details
    In: High Power Laser Science and Engineering, Cambridge University Press (CUP), Vol. 8 ( 2020)
    Abstract: In this paper, we report the recent progress on the $1~\text{PW}/0.1~\text{Hz}$ laser beamline of Shanghai Superintense Ultrafast Laser Facility (SULF). The SULF-1 PW laser beamline is based on the double chirped pulse amplification (CPA) scheme, which can generate laser pulses of 50.8 J at 0.1 Hz after the final amplifier; the shot-to-shot energy fluctuation of the amplified pulse is as low as 1.2% (std). After compression, the pulse duration of 29.6 fs is achieved, which can support a maximal peak power of 1 PW. The contrast ratio at $-80~\text{ps}$ before main pulse is measured to be $2.5\times 10^{-11}$ . The focused peak intensity is improved by optimizing the angular dispersion in the grating compressor. The maximal focused peak intensity can reach $2.7\times 10^{19}~\text{W}/\text{cm}^{2}$ even with an $f/26.5$ off-axis parabolic mirror. The horizontal and vertical angular pointing fluctuations in 1 h are measured to be 1.89 and $2.45~\unicode[STIX]{x03BC}\text{rad}$ , respectively. The moderate repetition rate and the good stability are desirable characteristics for laser–matter interactions. The SULF-1 PW laser beamline is now in the phase of commissioning, and preliminary experiments of particle acceleration and secondary radiation under 300–400 TW/0.1 Hz laser condition have been implemented. The progress on the experiments and the daily stable operation of the laser demonstrate the availability of the SULF-1 PW beamline.
    Type of Medium: Online Resource
    ISSN: 2095-4719 , 2052-3289
    URL: Article
    DOI: 10.1017/hpl.2020.3
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2020
    detail.hit.zdb_id: 2723155-0
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  • 3
    Online Resource
    Online Resource
    Ultra-broadband pulse generation via hollow-core fiber compression and frequency doubling for ultra-intense lasers
    Cambridge University Press (CUP) ; 2023
    In:  High Power Laser Science and Engineering Vol. 11 ( 2023)
    Details
    In: High Power Laser Science and Engineering, Cambridge University Press (CUP), Vol. 11 ( 2023)
    Abstract: We demonstrate an ultra-broadband high temporal contrast infrared laser source based on cascaded optical parametric amplification, hollow-core fiber (HCF) and second harmonic generation processes. In this setup, the spectrum of an approximately 1.8 μm laser pulse has near 1 μm full bandwidth by employing an argon gas-filled HCF. Subsequently, after frequency doubling with cascaded crystals and dispersion compensation by a fused silica wedge pair, 9.6 fs (~3 cycles) and 150 μJ pulses centered at 910 nm with full bandwidth of over 300 nm can be generated. The energy stability of the output laser pulse is excellent with 0.8% (root mean square) over 20 min, and the temporal contrast is 〉 10 12 at –10 ps before the main pulse. The excellent temporal and spatial characteristics and stability make this laser able to be used as a good seed source for ultra-intense and ultrafast laser systems.
    Type of Medium: Online Resource
    ISSN: 2095-4719 , 2052-3289
    URL: Article
    DOI: 10.1017/hpl.2022.44
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2023
    detail.hit.zdb_id: 2723155-0
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  • 4
    Online Resource
    Online Resource
    Dispersion management for a 100 PW level laser using a mismatched-grating compressor
    Cambridge University Press (CUP) ; 2022
    In:  High Power Laser Science and Engineering Vol. 10 ( 2022)
    Details
    In: High Power Laser Science and Engineering, Cambridge University Press (CUP), Vol. 10 ( 2022)
    Abstract: We report dispersion management based on a mismatched-grating compressor for a 100 PW level laser, which utilizes optical parametric chirped pulse amplification and also features large chirped pulse duration and an ultra-broadband spectrum. The numerical calculation indicates that amplified pulses with 4 ns chirped pulse duration and 210 nm spectral bandwidth can be directly compressed to sub-13 fs, which is close to the Fourier-transform limit (FTL). More importantly, the tolerances of the mismatched-grating compressor to the misalignment of the stretcher, the error of the desired grating groove density and the variation of material dispersion are comprehensively analyzed, which is crucially important for its practical application. The results demonstrate that good tolerances and near-FTL compressed pulses can be achieved simultaneously, just by keeping a balance between the residual second-, third- and fourth-order dispersions in the laser system. This work can offer a meaningful guideline for the design and construction of 100 PW level lasers.
    Type of Medium: Online Resource
    ISSN: 2095-4719 , 2052-3289
    URL: Article
    DOI: 10.1017/hpl.2022.29
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2022
    detail.hit.zdb_id: 2723155-0
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