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  • Optical control of transverse motion of ionization injected electrons in a laser plasma accelerator
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2021-01-18
    Jie Feng; Yifei Li; Jinguang Wang; Dazhang Li; Changqing Zhu; Junhao Tan; Xiaotao Geng; Feng Liu; Liming Chen

    We demonstrate an all-optical method for controlling the transverse motion of an ionization injected electron beam in a laser plasma accelerator by using the transversely asymmetrical plasma wakefield. The laser focus shape can control the distribution of a transversal wakefield. When the laser focus shape is changed from circular to slanted elliptical in the experiment, the electron beam profiles

    更新日期:2021-01-18
  • Highly efficient difference-frequency generation for mid-infrared pulses by passively synchronous seeding
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2021-01-13
    Kun Huang; Yinqi Wang; Jianan Fang; Huaixi Chen; Minghang Xu; Qiang Hao; Ming Yan; Heping Zeng

    We have proposed and experimentally demonstrated a novel scheme for efficient mid-infrared difference-frequency generation based on passively synchronized fiber lasers. The adoption of coincident seeding pulses in the nonlinear conversion process could substantially lower the pumping threshold for mid-infrared parametric emission. Consequently, a picosecond mid-infrared source at 3.1 μm was prepared

    更新日期:2021-01-13
  • Mandrel degradation model of combined fast and slow processes
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2021-01-08
    Yu Zhu; Zheng Liu; Famin Yu; Qiang Chen; Wei Feng; Zhanwen Zhang; Zhigang Wang

    In this paper, we report the study of degradation for a kind of ideal mandrel material called poly-α-methylstyrene based on theoretical and experimental methods. First-principles calculations reveal two types of process: depolymerization and hydrogen-transfer-induced chain scission. The energy barrier for the former (0.68–0.82 eV) is smaller than that for most of the latter (1.39–4.23 eV). More importantly

    更新日期:2021-01-08
  • Magnetic field annihilation and charged particle acceleration in ultra-relativistic laser plasmas
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2021-01-08
    Yan-Jun Gu; Sergei V. Bulanov

    Magnetic reconnection driven by laser plasma interactions attracts great interests in the recent decades. Motivated by the rapid development of the laser technology, the ultra strong magnetic field generated by the laser-plasma accelerated electrons provides unique environment to investigate the relativistic magnetic field annihilation and reconnection. It opens a new way for understanding relativistic

    更新日期:2021-01-08
  • Reflecting laser-driven shocks in diamond in the megabar pressure range
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2021-01-08
    K. Jakubowska; D. Mancelli; R. Benocci; J. Trela; I. Errea; A. S. Martynenko; P. Neumayer; O. Rosmej; B. Borm; A. Molineri; C. Verona; D. Cannatà; A. Aliverdiev; H. E. Roman; D. Batani

    In this work we present experimental results on the behavior of diamond at megabar pressure. The experiment was performed using the PHELIX facility at GSI in Germany to launch a planar shock into solid multi-layered diamond samples. The target design allows shock velocity in diamond and in two metal layers to be measured as well as the free surface velocity after shock breakout. As diagnostics, we

    更新日期:2021-01-08
  • A novel cleanliness control method for disk amplifiers
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-12-28
    Yangshuai Li; Bingyan Wang; Panzheng Zhang; Yanli Zhang; Yanfeng Zhang; Shenlei Zhou; Weixin Ma; Jianqiang Zhu

    As the key part for energy amplification of high-power laser systems, disk amplifiers must work in an extremely clean environment. Different from the traditional cleanliness control scheme of active intake and passive exhaust (AIPE), a new method of active exhaust and passive intake (AEPI) is proposed in this paper. Combined with computational fluid dynamics (CFD) technology, through the optimization

    更新日期:2020-12-28
  • Strong-field effects induced in the extreme ultraviolet domain
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-12-21
    I. Makos; I. Orfanos; E. Skantzakis; I. Liontos; P. Tzallas; A. Forembski; L. A. A. Nikolopoulos; D. Charalambidis

    Motivated by the achieved high intensities of novel extreme ultraviolet (XUV) radiation sources, such as free electron lasers and laser-driven high harmonic generation beamlines, we elaborate on their perspective in inducing observable strong field effects. The feasibility of extending such effects from the infrared and visible spectral regimes in the XUV domain is supported through numerically calculated

    更新日期:2020-12-21
  • Photonic crystal rod-based high-performance ultrafast fiber laser system
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-12-01
    Zhiguo Lv; Zhi Yang; Qianglong Li; Feng Li; Yishan Wang; Wei Zhao; Xiaojun Yang

    In this paper, we innovatively conduct a Porro prism-based beam pointing stability promotion technique research and realize a high-performance rod-type photonic crystal fiber-based chirped pulse amplification (CPA) system, mainly including a frequency-reduced all-fiber pre-amplification stage, photonic crystal rod-based main amplification stage, and 1600 lines/mm transmission grating-pair compressor

    更新日期:2020-12-18
  • Laser-induced damage thresholds of ultrathin targets and their constraint on laser contrast in laser-driven ion acceleration experiments
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-12-07
    Dahui Wang; Yinren Shou; Pengjie Wang; Jianbo Liu; Zhusong Mei; Zhengxuan Cao; Jianmin Zhang; Pengling Yang; Guobin Feng; Shiyou Chen; Yanying Zhao; Joerg Schreiber; Wenjun Ma

    Single-shot laser-induced damage threshold (LIDT) measurements of multi-type free-standing ultrathin foils were performed in a vacuum environment for 800 nm laser pulses with durations τ ranging from 50 fs to 200 ps. The results show that the laser damage threshold fluences (DTFs) of the ultrathin foils are significantly lower than those of corresponding bulk materials. Wide band gap dielectric targets

    更新日期:2020-12-18
  • A perspective on high photon flux nonclassical light and applications in nonlinear optics
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-12-07
    Th. Lamprou; I. Liontos; N. C. Papadakis; P. Tzallas

    Nonclassical light sources have a vital role in quantum optics as they offer a unique resource for studies in quantum technology. However, their applicability is restricted by their low intensity, while the development of new schemes producing intense nonclassical light is a challenging task. In this perspective article, we discuss potential schemes that could be used towards the development of high

    更新日期:2020-12-18
  • High-energy hybrid femtosecond laser system demonstrating 2 × 10 PW capability
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-12-15
    François Lureau; Guillaume Matras; Olivier Chalus; Christophe Derycke; Thomas Morbieu; Christophe Radier; Olivier Casagrande; Sébastien Laux; Sandrine Ricaud; Gilles Rey; Alain Pellegrina; Caroline Richard; Laurent Boudjemaa; Christophe Simon-Boisson; Andrei Baleanu; Romeo Banici; Andrei Gradinariu; Constantin Caldararu; Bertrand De Boisdeffre; Petru Ghenuche; Andrei Naziru; Georgios Kolliopoulos;

    We report on a two-arm hybrid high-power laser system (HPLS) able to deliver 2 × 10 PW femtosecond pulses, developed at the Bucharest-Magurele Extreme Light Infrastructure Nuclear Physics (ELI-NP) Facility. A hybrid front-end (FE) based on a Ti:sapphire chirped pulse amplifier and a picosecond optical parametric chirped pulse amplifier based on beta barium borate (BBO) crystals, with a cross-polarized

    更新日期:2020-12-18
  • Single-frequency and free-running operation of a single-pass pulsed Ho:YLF amplifier
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-11-11
    Yunpeng Wang; Youlun Ju; Tongyu Dai; Dong Yan; Baoquan Yao

    A single-frequency pulsed holmium-doped yttrium lithium fluoride (Ho:YLF) amplifier pumped by a Tm-doped fiber laser was demonstrated. The seed was an injection-seeded Q-switched Ho:YLF laser. The output energy from the single-frequency pulsed amplifier was 24.2 mJ, with a pulse width of 250 ns at a pulse repetition frequency (PRF) of 100 Hz. The energy stability during 30 min was improved to 1% after

    更新日期:2020-11-12
  • Asymmetric pulse effects on pair production in polarized electric fields
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-11-10
    Obulkasim Olugh; Zi-Liang Li; Bai-Song Xie

    Using the Dirac–Heisenberg–Wigner formalism, effects of the asymmetric pulse shape on the generation of electron-positron pairs in three typical polarized fields, i.e., linear, middle elliptical and circular fields, are investigated. Two kinds of asymmetries for the falling pulse length, short and elongated, are studied. We find that the interference effect disappears with the shorter pulse length

    更新日期:2020-11-12
  • Potential damage threats to downstream optics caused by Gaussian mitigation pits on rear KDP surface
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-11-04
    Hao Yang; Jian Cheng; Zhichao Liu; Qi Liu; Linjie Zhao; Chao Tan; Jian Wang; Mingjun Chen

    To determine whether a potassium dihydrogen phosphate (KDP) surface mitigated by micro-milling would potentially threaten downstream optics, we calculated the light-field modulation based on angular spectrum diffraction theory, and performed a laser damage test on downstream fused silica. The results showed that the downstream light intensification caused by a Gaussian mitigation pit of 800 μm width

    更新日期:2020-11-04
  • A Yb:KGW dual-crystal regenerative amplifier
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-10-26
    Huijun He; Jun Yu; Wentao Zhu; Xiaoyang Guo; Cangtao Zhou; Shuangchen Ruan

    This study develops a Yb:KGW dual-crystal based regenerative amplifier. The thermal lensing and gain-narrowing effects are compensated by the dual-crystal configuration. Sub-nanojoule pulses are amplified to 1.5 mJ with 9 nm spectral bandwidth and 1 kHz repetition rate using chirped pulse amplification technology. Consequently, 1.2 mJ pulses with a pulse duration of 227 fs are obtained after compression

    更新日期:2020-10-30
  • Generation of polarized particle beams at relativistic laser intensities
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-10-30
    Markus Büscher; Anna Hützen; Liangliang Ji; Andreas Lehrach

    The acceleration of polarized electrons, positrons, protons and ions in strong laser and plasma fields is a very attractive option for obtaining polarized beams in the multi-mega-electron volt range. Recently, there has been substantial progress in the understanding of the dominant mechanisms leading to high degrees of polarization, in the numerical modeling of these processes and in their experimental

    更新日期:2020-10-30
  • Gamma-ray generation from ultraintense laser-irradiated solid targets with preplasma
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-10-15
    Xiang-Bing Wang; Guang-Yue Hu; Zhi-Meng Zhang; Yu-Qiu Gu; Bin Zhao; Yang Zuo; Jian Zheng

    In the laser plasma interaction of quantum electrodynamics (QED)-dominated regime, γ-rays are generated due to synchrotron radiation from high-energy electrons traveling in a strong background electromagnetic field. With the aid of 2D particle-in-cell code including QED physics, we investigate the preplasma effect on the γ-ray generation during the interaction between an ultraintense laser pulse and

    更新日期:2020-10-16
  • Mid-infrared optical frequency comb in the 2.7–4.0 μm range via difference frequency generation from a compact laser system
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-10-07
    Lian Zhou; Yang Liu; Gehui Xie; Chenglin Gu; Zejiang Deng; Zhiwei Zhu; Cheng Ouyang; Zhong Zuo; Daping Luo; Bin Wu; Kunfeng Chen; Wenxue Li

    We report on the generation of a mid-infrared (mid-IR) frequency comb with a maximum average output power of 250 mW and tunability in the 2.7–4.0 μm region. The approach is based on a single-stage difference frequency generation (DFG) starting from a compact Yb-doped fiber laser system. The repetition rate of the near-infrared (NIR) comb is locked at 75 MHz. The phase noise of the repetition rate in

    更新日期:2020-10-07
  • Ultra-broadband all-OPCPA petawatt facility fully based on LBO
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-10-05
    Mario Galletti; Pedro Oliveira; Marco Galimberti; Munadi Ahmad; Giedre Archipovaite; Nicola Booth; Emerald Dilworth; Andy Frackiewicz; Trevor Winstone; Ian Musgrave; Cristina Hernandez-Gomez

    A petawatt facility fully based on noncollinear optical parametric chirped pulse amplification (NOPCPA) technology, Vulcan OPPEL (Vulcan OPCPA PEtawatt Laser), is presented. This system will be coupled with the existing hybrid-CPA/OPCPA VULCAN laser system (500 J, 500 fs beamline; 250 J, ns regime beamline) based on Nd:glass amplification. Its pulse duration (20 times shorter) combined with the system

    更新日期:2020-10-05
  • Greater than 2 kW all-passive fiber Raman amplifier with good beam quality
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-10-05
    Yizhu Chen; Tianfu Yao; Hu Xiao; Jinyong Leng; Pu Zhou

    We report a 2 kW all-fiberized Raman fiber amplifier with efficient brightness enhancement based on the graded-index fiber. The maximum power output reaches up to 2.034 kW centered at 1130 nm, with a conversion efficiency of 79.35% with respect to the injected pump power. To the best of our knowledge, this is the highest conversion efficiency obtained for any Raman laser system using graded-index fiber

    更新日期:2020-10-05
  • Ultra-broadband near-infrared NOPAs based on the nonlinear crystals BiBO and YCOB
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-09-21
    Mario Galletti; Hugo Pires; Victor Hariton; Joana Alves; Pedro Oliveira; Marco Galimberti; Gonçalo Figueira

    We evaluate and demonstrate ultra-broadband near-infrared noncollinear optical parametric amplification in two nonlinear crystals, bismuth borate (BiBO) and yttrium calcium oxyborate (YCOB), which are not commonly used for this application. The spectral bandwidth is of the microjoule level; the amplified signal is ≥ 200 nm, capable of supporting sub-10 fs pulses. These results, supported by numerical

    更新日期:2020-09-21
  • Spatiotemporal characterization of laser pulse amplification in double-pass active mirror geometry
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-09-18
    Tinghao Liu; Qiang Liu; Zhan Sui; Mali Gong; Xing Fu

    We present a spatiotemporal model of pulse amplification in the double-pass active mirror (AM) geometry. Three types of overlap condition are studied, and the spatiotemporal scaling under the four-pulse overlapping (4PO) condition is fully characterized for the first time, by mapping the temporal and spatial segments of beam to the instantaneous gain windows. Furthermore, the influence of spatiotemporal

    更新日期:2020-09-20
  • Decoupling of the position and angular errors in laser pointing with a neural network method
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-09-08
    Lei Xia; Yuanzhang Hu; Wenyu Chen; Xiaoguang Li

    In laser-pointing-related applications, when only the centroid of a laser spot is considered, then the position and angular errors of the laser beam are often coupled together. In this study, the decoupling of the position and angular errors is achieved from one single spot image by utilizing a neural network technique. In particular, the successful application of the neural network technique relies

    更新日期:2020-09-08
  • Clean source of soft X-ray radiation formed in supersonic Ar gas jets by high-contrast femtosecond laser pulses of relativistic intensity
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-06-25
    Maria Alkhimova; Sergey Ryazantsev; Igor Skobelev; Alexey Boldarev; Jie Feng; Xin Lu; Li-Ming Chen; Sergey Pikuz

    In this work, we optimized a clean, versatile, compact source of soft X-ray radiation $(E_{\text{x}\text{-}\text{ray}}\sim 3~\text{keV})$ with an yield per shot up to $7\times 10^{11}~\text{photons}/\text{shot}$ in a plasma generated by the interaction of high-contrast femtosecond laser pulses of relativistic intensity $(I_{\text{las}}\sim 10^{18}{-}10^{19}~\text{W}/\text{cm}^{2})$ with supersonic

    更新日期:2020-06-25
  • Efficient idler broadening via oppositely dual-chirped difference frequency generation
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-06-25
    Haizhe Zhong; Bin Hu; Saisai Hu; Shengying Dai; Ying Li; Dianyuan Fan

    Dual-chirped difference frequency generation (DFG) is an advantageous technique for generating the broadband mid-infrared (IR) idler wave, which is inaccessible by a population-inversion-based laser system. In principle, the generated idler wave may even suffer a spectrum broadening compared with the driving pulsed lasers if the pump and signal waves are oppositely chirped. However, broadband phase-matching

    更新日期:2020-06-25
  • 35 W continuous-wave Ho:YAG single-crystal fiber laser
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-06-23
    Yongguang Zhao; Li Wang; Weidong Chen; Jianlei Wang; Qingsong Song; Xiaodong Xu; Ying Liu; Deyuan Shen; Jun Xu; Xavier Mateos; Pavel Loiko; Zhengping Wang; Xinguang Xu; Uwe Griebner; Valentin Petrov

    We report on a high-power Ho:YAG single-crystal fiber (SCF) laser inband pumped by a high-brightness Tm-fiber laser at 1908 nm. The Ho:YAG SCF grown by the micro-pulling-down technique exhibits a propagation loss of $0.05\pm 0.005~\text{cm}^{-1}$ at $2.09~\unicode[STIX]{x03BC}\text{m}$ . A continuous-wave output power of 35.2 W is achieved with a slope efficiency of 42.7%, which is to the best of our

    更新日期:2020-06-23
  • Enhancement of the laser-driven proton source at PHELIX
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-06-22
    J. Hornung; Y. Zobus; P. Boller; C. Brabetz; U. Eisenbarth; T. Kühl; Zs. Major; J. B. Ohland; M. Zepf; B. Zielbauer; V. Bagnoud

    We present a study of laser-driven ion acceleration with micrometre and sub-micrometre thick targets, which focuses on the enhancement of the maximum proton energy and the total number of accelerated particles at the PHELIX facility. Using laser pulses with a nanosecond temporal contrast of up to $10^{-12}$ and an intensity of the order of $10^{20}~\text{W}/\text{cm}^{2}$ , proton energies up to 93 MeV

    更新日期:2020-06-22
  • Laser produced electromagnetic pulses: generation, detection and mitigation
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-06-09
    Fabrizio Consoli; Vladimir T. Tikhonchuk; Matthieu Bardon; Philip Bradford; David C. Carroll; Jakub Cikhardt; Mattia Cipriani; Robert J. Clarke; Thomas E. Cowan; Colin N. Danson; Riccardo De Angelis; Massimo De Marco; Jean-Luc Dubois; Bertrand Etchessahar; Alejandro Laso Garcia; David I. Hillier; Ales Honsa; Weiman Jiang; Viliam Kmetik; Josef Krása; Yutong Li; Frédéric Lubrano; Paul McKenna; Josefine

    This paper provides an up-to-date review of the problems related to the generation, detection and mitigation of strong electromagnetic pulses created in the interaction of high-power, high-energy laser pulses with different types of solid targets. It includes new experimental data obtained independently at several international laboratories. The mechanisms of electromagnetic field generation are analyzed

    更新日期:2020-06-09
  • Simultaneous observation of ultrafast electron and proton beams in TNSA
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-06-09
    Fabrizio Bisesto; Mario Galletti; Maria Pia Anania; Gemma Costa; Massimo Ferrario; Riccardo Pompili; Arie Zigler; Fabrizio Consoli; Mattia Cipriani; Martina Salvadori; Claudio Verona

    The interaction of ultra-intense high-power lasers with solid-state targets has been largely studied for the past 20 years as a future compact proton and ion source. Indeed, the huge potential established on the target surface by the escaping electrons provides accelerating gradients of TV/m. This process, called target normal sheath acceleration, involves a large number of phenomena and is very difficult

    更新日期:2020-06-09
  • Stimulated Raman scattering in a non-eigenmode regime
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-05-21
    Yao Zhao; Suming Weng; Zhengming Sheng; Jianqiang Zhu

    Stimulated Raman scattering (SRS) in plasma in a non-eigenmode regime is studied theoretically and numerically. Different from normal SRS with the eigen electrostatic mode excited, the non-eigenmode SRS is developed at plasma density $n_{e}>0.25n_{c}$ when the laser amplitude is larger than a certain threshold. To satisfy the phase-matching conditions of frequency and wavenumber, the excited electrostatic

    更新日期:2020-05-21
  • Pushing the boundaries of diode-pumped solid-state lasers for high-energy applications
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-05-20
    Saumyabrata Banerjee; Paul Mason; Jonathan Phillips; Jodie Smith; Thomas Butcher; Jacob Spear; Mariastefania De Vido; Gary Quinn; Danielle Clarke; Klaus Ertel; Cristina Hernandez-Gomez; Chris Edwards; John Collier

    We report on the successful demonstration of a 150 J nanosecond pulsed cryogenic gas cooled, diode-pumped multi-slab Yb:YAG laser operating at 1 Hz. To the best of our knowledge, this is the highest energy ever recorded for a diode-pumped laser system.

    更新日期:2020-05-20
  • Self-induced birefringence of white-light continuum generated by interaction of focused femtosecond laser pulses with fused silica
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-05-19
    J. Qian; G. D. Wang; K. Y. Lou; D. Y. Shen; Q. Fu; Q. Z. Zhao

    White-light continuum can be induced by the interaction of intense femtosecond laser pulses with condensed materials. By using two orthogonal polarizers, a self-induced birefringence of continuum is observed when focusing femtosecond laser pulses into bulk fused silica. That is, the generated white-light continuum is synchronously modulated anisotropically while propagating in fused silica. Time-resolved

    更新日期:2020-05-19
  • Improved stability of a compact vacuum-free laser-plasma X-ray source
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-05-08
    L. Martín; J. Benlliure; D. Cortina-Gil; J. Peñas; C. Ruiz

    We report the development of a stable high-average power X-ray source generated by the interaction of ultrashort laser pulses (35 fs, 1 mJ, 1 kHz) with a solid target in air. The achieved source stability, which is essential for the applications foreseen for these laser-driven plasma accelerators, is due to the combination of precise positioning of the target on focus and the development of a fast

    更新日期:2020-05-08
  • Tunable optical frequency comb from a compact and robust Er:fiber laser
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-05-07
    Zhiwei Zhu; Yang Liu; Daping Luo; Chenglin Gu; Lian Zhou; Gehui Xie; Zejiang Deng; Wenxue Li

    We report on a compact and robust self-referenced optical frequency comb with a tunable repetition rate, generated by an all-polarization-maintaining (PM) mode-locked Er-doped fiber laser. The spacing between comb teeth can be tuned above 300 kHz at a repetition rate of 101 MHz. The repetition rate and the carrier–envelope offset of the laser are stabilized separately, and the relative residual phase

    更新日期:2020-05-07
  • Generation mechanism of 100 MG magnetic fields in the interaction of ultra-intense laser pulse with nanostructured target
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-05-06
    J. M. Tian; H. B. Cai; W. S. Zhang; E. H. Zhang; B. Du; S. P. Zhu

    Experimental and simulation data [Moreau et al., Plasma Phys. Control. Fusion 62, 014013 (2019); Kaymak et al., Phys. Rev. Lett. 117, 035004 (2016)] indicate that self-generated magnetic fields play an important role in enhancing the flux and energy of relativistic electrons accelerated by ultra-intense laser pulse irradiation with nanostructured arrays. A fully relativistic analytical model for the

    更新日期:2020-05-06
  • Two-micron all-fiberized passively mode-locked fiber lasers with high-energy nanosecond pulse
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-04-29
    Meng Wang; Yijian Huang; Zongpeng Song; Jincheng Wei; Jihong Pei; Shuangchen Ruan

    We report on mode-locked thulium-doped fiber lasers with high-energy nanosecond pulses, relying on the transmission in a semiconductor saturable absorber (SESA) and a carbon nanotube (CNTs-PVA) film separately. A section of an SMF–MMF–SMF structure multimode interferometer with a transmission peak wavelength of ∼2003 nm was used as a wavelength selector to fix the laser wavelength. When the SESA acted

    更新日期:2020-04-29
  • Relativistic electron acceleration by surface plasma waves excited with high intensity laser pulses
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-04-29
    X. M. Zhu; R. Prasad; M. Swantusch; B. Aurand; A. A. Andreev; O. Willi; M. Cerchez

    The process of high energy electron acceleration along the surface of grating targets (GTs) that were irradiated by a relativistic, high-contrast laser pulse at an intensity $I=2.5\times 10^{20}~\text{W}/\text{cm}^{2}$ was studied. Our experimental results demonstrate that for a GT with a periodicity twice the laser wavelength, the surface electron flux is more intense for a laser incidence angle that

    更新日期:2020-04-29
  • High-power long-wave infrared laser based on polarization beam coupling technique
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-04-21
    Yingjie Shen; Chuanpeng Qian; Xiaoming Duan; Ruijun Lan

    We demonstrated a high-power long-wave infrared laser based on a polarization beam coupling technique. An average output power at $8.3~\unicode[STIX]{x03BC}\text{m}$ of 7.0 W was achieved at a maximum available pump power of 107.6 W, corresponding to an optical-to-optical conversion of 6.5%. The coupling efficiency of the polarization coupling system was calculated to be approximately 97.2%. With idler

    更新日期:2020-04-21
  • Thermal lens analysis in a diode-pumped 10 Hz 100 mJ Yb:YAG amplifier
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-04-21
    Victor Hariton; Celso Paiva João; Hugo Pires; Mario Galletti; Gonçalo Figueira

    We address the power scaling issue in end-pumped laser rod amplifiers by studying, experimentally and numerically, the magnitude of thermal lensing in a high-energy diode-pumped Yb:YAG crystal. The spatio-temporal temperature profile of the gain medium and the focal length of the induced thermal lens are determined numerically. The influence of the repetition rate and pumping power on the temperature

    更新日期:2020-04-21
  • High-efficiency 50 W burst-mode hundred picosecond green laser
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-01-31
    Ning Ma; Meng Chen; Ce Yang; Shang Lu; Xie Zhang; Xinbiao Du

    We report high-energy, high-efficiency second harmonic generation in a near-infrared all-solid-state burst-mode picosecond laser at a repetition rate of 1 kHz with four pulses per burst using a type-I noncritical phase-matching lithium triborate crystal. The pulses in each burst have the same time delay ( ${\sim}1~\text{ns}$ ), the same pulse duration ( ${\sim}100~\text{ps}$ ) and different relative

    更新日期:2020-04-20
  • Transport of ultraintense laser-driven relativistic electrons in dielectric targets
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-02-13
    X. H. Yang; C. Ren; H. Xu; Y. Y. Ma; F. Q. Shao

    Ultraintense laser-driven relativistic electrons provide a way of heating matter to high energy density states related to many applications. However, the transport of relativistic electrons in solid targets has not been understood well yet, especially in dielectric targets. We present the first detailed two-dimensional particle-in-cell simulations of relativistic electron transport in a silicon target

    更新日期:2020-04-20
  • Generation and imaging of a tunable ultrafast intensity-rotating optical field with a cycle down to femtosecond region
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-02-14
    Xuanke Zeng; Shuiqin Zheng; Yi Cai; Hongyu Wang; Xiaowei Lu; Honggeng Wang; Jingzhen Li; Weixin Xie; Shixiang Xu

    A tunable ultrafast intensity-rotating optical field is generated by overlapping a pair of 20 Hz, 800 nm chirped pulses with a Michelson interferometer (MI). Its rotating rate can be up to 10 trillion radians per second ( $\text{Trad}/\text{s}$ ), which can be flexibly tuned with a mirror in the MI. Besides, its fold rotational symmetry structure is also changeable by controlling the difference from

    更新日期:2020-04-20
  • The $1~\text{PW}/0.1~\text{Hz}$ laser beamline in SULF facility
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-02-14
    Zongxin Zhang; Fenxiang Wu; Jiabing Hu; Xiaojun Yang; Jiayan Gui; Penghua Ji; Xingyan Liu; Cheng Wang; Yanqi Liu; Xiaoming Lu; Yi Xu; Yuxin Leng; Ruxin Li; Zhizhan Xu

    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%

    更新日期:2020-04-20
  • Innovative education and training in high power laser plasmas (PowerLaPs) for plasma physics, high power laser matter interactions and high energy density physics: experimental diagnostics and simulations
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-02-18
    John Pasley; Georgia Andrianaki; Andreas Baroutsos; Dimitri Batani; Emmanouil P. Benis; Andrea Ciardi; Donna Cook; Vasilios Dimitriou; Brendan Dromey; Ioannis Fitilis; Giancarlo Gatti; Anastasios Grigoriadis; Marine Huault; Jose Antonio Pérez Hernández; Evaggelos Kaselouris; Ondrej Klimo; Michel Koenig; George Koundourakis; Milan Kucharik; Jiri Limpouch; Richard Liska; Carlos Salgado Lopez; Sophia

    The second and final year of the Erasmus Plus programme ‘Innovative Education and Training in high power laser plasmas’, otherwise known as PowerLaPs, is described. The PowerLaPs programme employs an innovative paradigm in that it is a multi-centre programme, where teaching takes place in five separate institutes with a range of different aims and styles of delivery. The ‘in-class’ time is limited

    更新日期:2020-04-20
  • Rapid growth of a long-seed KDP crystal
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-02-19
    Duanyang Chen; Bin Wang; Hu Wang; Xiangyu Zhu; Ziyuan Xu; Yuanan Zhao; Shenghao Wang; Kaizao Ni; Lili Zheng; Hui Zhang; Hongji Qi; Jianda Shao

    To reduce the seed length while maintaining the advantages of the cuboid KDP-type crystal, a long-seed KDP crystal with size $471~\text{mm}\times 480~\text{mm}\times 400~\text{mm}$ is rapidly grown. With almost the same high cutting efficiency to obtain third harmonic generation oriented samples, this long-seed KDP-type crystal can be grown with a shorter seed than that of the cuboid KDP-type crystal

    更新日期:2020-04-20
  • Hydrodynamic computational modelling and simulations of collisional shock waves in gas jet targets
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-03-23
    Stylianos Passalidis; Oliver C. Ettlinger; George S. Hicks; Nicholas P. Dover; Zulfikar Najmudin; Emmanouil P. Benis; Evaggelos Kaselouris; Nektarios A. Papadogiannis; Michael Tatarakis; Vasilis Dimitriou

    We study the optimization of collisionless shock acceleration of ions based on hydrodynamic modelling and simulations of collisional shock waves in gaseous targets. The models correspond to the specifications required for experiments with the $\text{CO}_{2}$ laser at the Accelerator Test Facility at Brookhaven National Laboratory and the Vulcan Petawatt system at Rutherford Appleton Laboratory. In

    更新日期:2020-04-20
  • Laser-system model for enhanced operational performance and flexibility on OMEGA EP
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-03-23
    M. J. Guardalben; M. Barczys; B. E. Kruschwitz; M. Spilatro; L. J. Waxer; E. M. Hill

    The development of laser performance models having real-time prediction capability for the OMEGA EP laser system has been essential in meeting requests from its user community for increasingly complex pulse shapes that span a wide range of energies. The laser operations model PSOPS provides rapid and accurate predictions of OMEGA EP laser-system performance in both forward and backward directions,

    更新日期:2020-04-20
  • Innovative education and training in high power laser plasmas (PowerLaPs) for plasma physics, high power laser matter interactions and high energy density physics: experimental diagnostics and simulations – CORRIGENDUM
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-03-31
    John Pasley; Georgia Andrianaki; Jon Imanol Apiñaniz; Andreas Baroutsos; Dimitri Batani; Emmanouil P. Benis; Andrea Ciardi; Donna Cook; Massimo de Marco; Vasilios Dimitriou; Brendan Dromey; Ioannis Fitilis; Giancarlo Gatti; Anastasios Grigoriadis; Marine Huault; Jose Antonio Pérez Hernández; Evaggelos Kaselouris; Ondrej Klimo; Michel Koenig; George Koundourakis; Milan Kucharik; Jiri Limpouch; Richard

    The second and final year of the Erasmus Plus programme ‘Innovative Education and Training in high power laser plasmas’, otherwise known as PowerLaPs, is described. The PowerLaPs programme employs an innovative paradigm in that it is a multi-centre programme, where teaching takes place in five separate institutes with a range of different aims and styles of delivery. The ‘in-class’ time is limited

    更新日期:2020-04-20
  • High-power operation of double-pass pumped Nd:YVO4 thin disk laser
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-04-01
    Wei Wang; Di Sun; Xiao Du; Jie Guo; Xiaoyan Liang

    A simple, compact, double-pass pumped Nd:YVO4 thin disk laser is demonstrated. Its continuous-wave performance with different Nd doping concentrations and thicknesses is investigated experimentally. The maximum output power of 17.7 W is achieved by employing a 0.5 at.% doped sample, corresponding to an optical-to-optical efficiency of 46% with respect to the absorbed pump power. In addition, a numerical

    更新日期:2020-04-20
  • Proton deflectometry of a capacitor coil target along two axes
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2020-04-02
    P. Bradford; M. P. Read; M. Ehret; L. Antonelli; M. Khan; N. Booth; K. Glize; D. Carroll; R. J. Clarke; R. Heathcote; S. Ryazantsev; S. Pikuz; C. Spindloe; J. D. Moody; B. B. Pollock; V. T. Tikhonchuk; C. P. Ridgers; J. J. Santos; N. C. Woolsey

    A developing application of laser-driven currents is the generation of magnetic fields of picosecond–nanosecond duration with magnitudes exceeding $B=10~\text{T}$ . Single-loop and helical coil targets can direct laser-driven discharge currents along wires to generate spatially uniform, quasi-static magnetic fields on the millimetre scale. Here, we present proton deflectometry across two axes of a

    更新日期:2020-04-20
  • All-optical $\unicode[STIX]{x1D707}^{-}$ acceleration in the laser wakefield
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2018-12-19
    F. Zhang; Z. G. Deng; L. Q. Shan; Z. M. Zhang; B. Bi; D. X. Liu; W. W. Wang; Z. Q. Yuan; C. Tian; S. Q. Yang; B. Zhang; Y. Q. Gu

    Muons produced by the Bethe–Heitler process from laser wakefield accelerated electrons interacting with high $Z$ materials have velocities close to the laser wakefield. It is possible to accelerate those muons with laser wakefield directly. Therefore for the first time we propose an all-optical ‘Generator and Booster’ scheme to accelerate the produced muons by another laser wakefield to supply a prompt

    更新日期:2018-12-19
  • Development of a 100 J, 10 Hz laser for compression experiments at the High Energy Density instrument at the European XFEL
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2018-12-19
    Paul Mason; Saumyabrata Banerjee; Jodie Smith; Thomas Butcher; Jonathan Phillips; Hauke Höppner; Dominik Möller; Klaus Ertel; Mariastefania De Vido; Ian Hollingham; Andrew Norton; Stephanie Tomlinson; Tinesimba Zata; Jorge Suarez Merchan; Chris Hooker; Mike Tyldesley; Toma Toncian; Cristina Hernandez-Gomez; Chris Edwards; John Collier

    In this paper we review the design and development of a 100 J, 10 Hz nanosecond pulsed laser, codenamed DiPOLE100X, being built at the Central Laser Facility (CLF). This 1 kW average power diode-pumped solid-state laser (DPSSL) is based on a master oscillator power amplifier (MOPA) design, which includes two cryogenic gas cooled amplifier stages based on DiPOLE multi-slab ceramic Yb:YAG amplifier technology

    更新日期:2018-12-19
  • Single-shot cross-correlator for pulse-contrast characterization of high peak-power lasers
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2018-12-18
    Jingui Ma; Peng Yuan; Jing Wang; Guoqiang Xie; Heyuan Zhu; Liejia Qian

    Pulse contrast is a crucial parameter of high peak-power lasers since the prepulse noise may disturb laser–plasma interactions. Contrast measurement is thus a prerequisite to tackle the contrast challenge in high peak-power lasers. This paper presents the progress review of single-shot cross-correlator (SSCC) for real-time contrast characterization. We begin with the key technologies that enable an

    更新日期:2018-12-18
  • Loss mechanism of all-fiber cascaded side pumping combiner
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2018-11-16
    Chengmin Lei; Zilun Chen; Yanran Gu; Hu Xiao; Jing Hou

    Compared with end pumping fiber combiner, one of the advantages for side pumping combiner is the unlimited pumping points, which means multi-point or cascaded side pumping can be realized. However, the loss mechanism of the cascaded structure is rarely discussed. In this paper, we present the numerical and experimental investigation about the loss mechanism of a two-stage-cascaded side pumping combiner

    更新日期:2018-11-16
  • High power all-fiberized and narrow-bandwidth MOPA system by tandem pumping strategy for thermally induced mode instability suppression
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2018-11-16
    Pengfei Ma; Hu Xiao; Daren Meng; Wei Liu; Rumao Tao; Jinyong Leng; Yanxing Ma; Rongtao Su; Pu Zhou; Zejin Liu

    An all-fiberized and narrow-bandwidth master oscillator power amplification (MOPA) system with record output power of 4 kW level and slope efficiency of 78% is demonstrated. Tandem pumping strategy is tentatively introduced into the narrow-bandwidth MOPA system for thermally induced mode instability (TMI) suppression. The stimulated Brillouin scattering (SBS) effect is balanced by simply using one-stage

    更新日期:2018-11-16
  • Suppression of amplitude modulation induced by polarization mode dispersion using a multi-degree-of-freedom fiber filter
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2018-10-23
    Rao Li; Youen Jiang; Zhi Qiao; Canhong Huang; Wei Fan; Xuechun Li; Zunqi Lin

    Polarization mode dispersion (PMD) in fibers for high-power lasers can induce significant frequency modulation to amplitude modulation (FM-to-AM) conversion. However, existing techniques are not sufficiently flexible to achieve efficient compensation for such FM-to-AM conversion. By analyzing the nonuniform transmission spectrum caused by PMD, we found that the large-scale envelope of the transmission

    更新日期:2018-10-23
  • In-band pumping avenue based high power superfluorescent fiber source with record power and near-diffraction-limited beam quality
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2018-08-15
    Jiangming Xu; Jun Ye; Hu Xiao; Jinyong Leng; Wei Liu; Pu Zhou

    High power superfluorescent fiber sources (SFSs), which could find wide applications in many fields such as middle infrared laser generation, Raman fiber laser pumping and spectral beam combination, have experienced a flourishing time in recent years for its unique properties, such as short coherence length and high temporal stability. The challenge for performance scalability of powerful SFS mainly

    更新日期:2018-08-15
  • 400 TW operation of Orion at ultra-high contrast
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2018-08-15
    Stefan Parker; Colin Danson; David Egan; Stephen Elsmere; Mark Girling; Ewan Harvey; David Hillier; Dianne Hussey; Stephen Masoero; James McLoughlin; Rory Penman; Paul Treadwell; David Winter; Nicholas Hopps

    The Orion facility at the Atomic Weapons Establishment in the United Kingdom has the capability to operate one of its two 500 J, 500 fs short-pulse petawatt beams at the second harmonic, the principal reason being to increase the temporal contrast of the pulse on target. This is achieved post-compression, using 3 mm thick type-1 potassium dihydrogen phosphate crystals. Since the beam diameter of the

    更新日期:2018-08-15
  • Monolithic high-average-power linearly polarized nanosecond pulsed fiber laser with near-diffraction-limited beam quality
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2018-07-16
    Long Huang; Pengfei Ma; Daren Meng; Lei Li; Rumao Tao; Rongtao Su; Yanxing Ma; Pu Zhou

    An all-fiberized high-average-power narrow linewidth ns pulsed laser with linear polarization is demonstrated. The laser system utilizes a typical master oscillator power amplifier (MOPA) configuration. The stimulated Brillouin scattering (SBS) is effectively suppressed due to the short fiber length and large mode area in the main amplifier, combined with the narrow pulse duration smaller than the

    更新日期:2018-07-16
  • Development and prospect of high-power $\text{Yb}^{3+}$ doped fibers
    High Power Laser Sci. Eng. (IF 2.606) Pub Date : 2018-07-11
    Yibo Wang; Gui Chen; Jinyan Li

    Ytterbium-doped fibers have become the optimum gain media of high-power fiber lasers thanks to a simple energy structure, which strongly reduces the excited state absorption, and a low quantum defect and a high optic–optic conversion efficiency, which means the low thermal load. In this paper, we take a review of the current state of the art in terms of $\text{Yb}^{3+}$ doped fibers for high-power

    更新日期:2018-07-11
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