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

Bleotu, P.; Wheeler, Jonathan; Mironov, S. Yu.; Ginzburg, V.; Masruri, Masruri; Naziru, A.; Secareanu, R.; Ursescu, D.; Perez, F.; DeSousa, J.; Badarau, D.; Veuillot, E.; Audebert, P.; Khazanov, E.; G., Mourou,

doi:10.1017/hpl.2023.10

Cited by 9 publications

(2 citation statements)

References 45 publications

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“…The TFC method was successfully demonstrated in high-power laser systems. However, technological challenges currently limit the dimensions of the chirped mirrors used in TFC to sizes that can accommodate pulses in the near-PW range 31 , while the most practical implementations are at the 100 TW peak power level [32][33][34][35][36] . Reliability of the pulse duration and focal spot distortions are additional concerns for performing experiments.…”

Section: Introductionmentioning

confidence: 99%

Few-cycle, 100-TW-class laser pulses as efficient sources of nanocoulomb electron bunches and Bremsstrahlung

Horný,

Bleotu,

Ursescu

et al. 2024

Preprint

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The state-of-the-art ultrashort, few-cycle laser pulses recently have entered the regime of the 100 TW-class power and at 10 Hz repetition rate. We explore the potential of such pulses for efficient electron acceleration. The numerical modelling predicts that hundreds-MeV, nC-class electron bunches can be generated, transferring up to 58% of the laser pulse energy into electrons above 15 MeV. Furthermore, we exploit such electron bunches for the generation of a secondary source of hard X-ray Bremsstrahlung in a high-Z converter. The results suggest that up to 30% of the laser energy can be transformed into hard X-rays with energy above 10 keV. Such an exceptionally high conversion efficiency is achieved through increased laser-to-electron conversion due to the short duration of the laser pulse and the high energy of the accelerated electrons, where radiation losses in the converter significantly outweigh collisional losses. This Bremsstrahlung emitter could function as a generator of tertiary particles, including neutrons released through photonuclear reactions.

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Section: Introductionmentioning

confidence: 99%

Few-cycle, 100-TW-class laser pulses as efficient sources of nanocoulomb electron bunches and Bremsstrahlung

Horný,

Bleotu,

Ursescu

et al. 2024

Preprint

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“…The progress of modern high-power laser systems towards the generation of extreme fields, currently demonstrating up to 10 PW pulses [ 1 , 2 ] , has been impeded by one main challenge: the modest resistance to laser-induced optical damage of their constituent components. The threshold resistance is further stretched to the limits within post-compression techniques via thin film compression [ 3 ] , which have been successfully used to increase the peak power for different input laser pulse duration [ 4 , 5 ] and J-level energy [ 6 ] .…”

Section: Introductionmentioning

confidence: 99%

Exploring fs-laser irradiation damage subthreshold behavior of dielectric mirrors via electrical measurements

Bleotu,

Udrea,

Dumitru

et al. 2023

High Pow Laser Sci Eng

Self Cite

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With ultrafast laser systems reaching presently 10 PW peak power or operating at high repetition rates, research towards ensuring the long-term, trouble-free performance of all laser-exposed optical components is critical. Our work is focused on providing insight into the optical material behavior at fluences below the standardized laser-induced damage threshold (LIDT) value by implementing a simultaneous dual analysis of surface emitted particles using a Langmuir probe (LP) and the target current (TC). HfO 2 and ZrO 2 thin films deposited on fused silica substrates by pulsed laser deposition at various O 2 pressures for defect and stoichiometry control were irradiated by Gaussian, ultrashort laser pulses (800 nm, 10 Hz, 70 fs) in a wide range of fluences. Both TC and LP collected signals were in good agreement with the existing theoretical description of laser-matter interaction at an ultrashort time scale. Our approach for an in situ LIDT monitoring system provides measurable signals for below-threshold irradiation conditions that indicate the endurance limit of the optical surfaces in the single-shot energy scanning mode. The LIDT value extracted from the LP-TC system is in line with the multipulse statistical analysis done with ISO 21254-2:2011(E). The implementation of the LP and TC as on-shot diagnostic tools for optical components will have a significant impact on the reliability of next-generation ultrafast and high-power laser systems.

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Self-compression of laser pulses induced by asymmetric self-phase modulation aided by backward Raman scattering in periodic density-modulated plasma

Li,

Xue,

Wang

et al. 2024

Phys. Rev. E

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

Cited by 9 publications

References 45 publications

Few-cycle, 100-TW-class laser pulses as efficient sources of nanocoulomb electron bunches and Bremsstrahlung

Few-cycle, 100-TW-class laser pulses as efficient sources of nanocoulomb electron bunches and Bremsstrahlung

Exploring fs-laser irradiation damage subthreshold behavior of dielectric mirrors via electrical measurements

Self-compression of laser pulses induced by asymmetric self-phase modulation aided by backward Raman scattering in periodic density-modulated plasma

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