First HPLS Experiments at ELI-NP: Spectral Broadening in Thin Films

Ursescu, D.; Matei, Dan; Talposi, Maria; Iancu, Vicentiu; Aleksandrov, Veselin; Bleotu, Gabriel; Nazîru, Andrei; Tešileanu, O.; Roșu, Mădălin; Nakamiya, Y.; Cernaianu, Mihail; Boisdeffre, Bertrand De; Ene, Costin; Caragea, Mihai; Lazar, Alexandru C.; Kiss, Miklós; Masruri, Masruri; Caratas, Loredana; Toader, Adrian; Nistor, Dmitrii; Luta, Vlad; Tatulea, Bogdan; Popa, D.; Stan, Nicu; Jitsuno, Takahisa; Banici, Romeo; Baleanu, Andrei; Gradinariu, Andrei; Wheeler, Jonathan; Mourou, G.; Dancus, I.

doi:10.1364/ls.2020.lw5g.4

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…The glass wafers are carefully mounted within custom frames manufactured in-house at the Apollon facility. While the use of thin film polymers has been proposed as ideal for the TFC method the glass wafers represented readily available, standard stock materials that were pre-approved for vacuum compatibility within the LFA target chamber of the APOLLON laser facility [21,22] . The best examples of transmitted wavefront error for these standard wafers are on the order of (1.4 ± 0.2) λ for the 0.4 mm wafer and (1.0 ± 0.2) λ for the 0.3 mm wafer (λ @ 633 nm) as measured in the facility's optics metrology laboratory.…”

Section: Lfa Target Chambermentioning

confidence: 99%

Spectral broadening for multi-Joule pulse compression in the APOLLON Long Focal Area facility

Bleotu

Wheeler

Papadopoulos

et al. 2022

High Pow Laser Sci Eng

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Spectral-broadening of the Apollon PW-class laser pulses using a Thin Film Compression technique within the Long-Focal-Area interaction chamber of the APOLLON laser facility is reported, demonstrating the delivery of the full energy pulse to the target interaction area. The laser pulse at 7 J passing through large aperture, thin glass wafers is spectrally broadened to a bandwidth that is compatible with a 15 fs pulse, indicating also the possibility to achieve sub-10 fs pulses using 14 J. Placing the post-compressor near the interaction makes for an economical method to produce the shortest pulses by limiting the need for high damage, broadband optics close to the final target rather than throughout the entire laser transport system.

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Section: Lfa Target Chambermentioning

confidence: 99%

Spectral broadening for multi-Joule pulse compression in the APOLLON Long Focal Area facility

Bleotu

Wheeler

Papadopoulos

et al. 2022

High Pow Laser Sci Eng

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“…The bandwidth modifications are easier to observe on laser systems with a shorter initial pulse. Thus, the compression technique has been studied at the TW-scale at several of these laser systems, including CETAL, ALLS, PEARL, ELI-NP and CoReLS [13][14][15][16][17][18][19] , demonstrating up to fivefold pulse compression [20] , and even six-fold [21] . The technique was applied in producing betatron radiation from laser wakefield acceleration (LWFA) [22] , and the method is now being implemented on PW-scale laser systems [23,24] .…”

Section: Introductionmentioning

confidence: 99%

Post-compression of high-energy, sub-picosecond laser pulses

Bleotu

Wheeler²,

Mironov³

et al. 2023

High Pow Laser Sci Eng

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The post-compression technique based on self-phase modulation of high-energy pulses leads to an increase in achievable peak power and intensity. Typically, the pulses considered in experiments have been less than 100 fs in duration. Here, the method is applied to the ELFIE laser system at the LULI facility, for a pulse of 7 J energy and an initial measured duration of 350 fs. A 5 mm thick Fused Silica window and a 2 mm COP polymer were used as optical nonlinear materials. The 9 cm diameter pulse was spectrally broadened to a bandwidth corresponding to 124 fs Fourier-limited pulse duration, then it was partly post-compressed to 200 fs. After measuring the spatial spectra of the beam fluence, a uniform gain factor of 4 increase in the fluctuations over the studied range of frequencies is observed, due to small-scale self-focusing.

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First HPLS Experiments at ELI-NP: Spectral Broadening in Thin Films

Abstract: Following the completion of the installation and testing of the HPLS 2x10PW laser system at ELI-NP, prospective experiments related to spectral broadening in thin films for post-compression were performed at the HPLS 100TW output.

Cited by 2 publications

References 3 publications

Spectral broadening for multi-Joule pulse compression in the APOLLON Long Focal Area facility

Spectral broadening for multi-Joule pulse compression in the APOLLON Long Focal Area facility

Post-compression of high-energy, sub-picosecond laser pulses

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