High Power Laser Science and Engineering最新文献_第6页

Phase imaging of irradiated foils at the OMEGA EP facility using phase-stepping X-ray Talbot–Lau deflectometry 使用步进x射线塔尔博特-劳偏转计的欧米茄EP设施辐照箔的相位成像

IF 4.8 1区物理与天体物理

High Power Laser Science and Engineering Pub Date : 2023-05-26 DOI: 10.1017/hpl.2023.44

G. Pérez-Callejo, V. Bouffetier, L. Ceurvorst, T. Goudal, S. Klein, D. Svyatskiy, M. Holec, P. Perez-Martin, K. Falk, A. Casner, T. Weber, G. Kagan, M. Valdivia

{"title":"Phase imaging of irradiated foils at the OMEGA EP facility using phase-stepping X-ray Talbot–Lau deflectometry","authors":"G. Pérez-Callejo, V. Bouffetier, L. Ceurvorst, T. Goudal, S. Klein, D. Svyatskiy, M. Holec, P. Perez-Martin, K. Falk, A. Casner, T. Weber, G. Kagan, M. Valdivia","doi":"10.1017/hpl.2023.44","DOIUrl":"https://doi.org/10.1017/hpl.2023.44","url":null,"abstract":"Abstract Diagnosing the evolution of laser-generated high energy density (HED) systems is fundamental to develop a correct understanding of the behavior of matter under extreme conditions. Talbot–Lau interferometry constitutes a promising tool, since it permits simultaneous single-shot X-ray radiography and phase-contrast imaging of dense plasmas. We present the results of an experiment at OMEGA EP that aims to probe the ablation front of a laser-irradiated foil using a Talbot–Lau X-ray interferometer. A polystyrene (CH) foil was irradiated by a laser of 133 J, 1 ns and probed with 8 keV laser-produced backlighter radiation from Cu foils driven by a short-pulse laser (153 J, 11 ps). The ablation front interferograms were processed in combination with a set of reference images obtained ex situ using phase-stepping. We managed to obtain attenuation and phase-shift images of a laser-irradiated foil for electron densities above \u0000${10}^{22};{mathrm{cm}}^{-3}$\u0000 . These results showcase the capabilities of Talbot–Lau X-ray diagnostic methods to diagnose HED laser-generated plasmas through high-resolution imaging.","PeriodicalId":54285,"journal":{"name":"High Power Laser Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90259210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

X-ray polarimetry and its application to strong-field quantum electrodynamics x射线偏振法及其在强场量子电动力学中的应用

IF 4.8 1区物理与天体物理

High Power Laser Science and Engineering Pub Date : 2023-05-25 DOI: 10.1017/hpl.2023.45

Qiqi Yu, Dirui Xu, B. Shen, T. Cowan, H. Schlenvoigt

引用次数: 1

Effect of subsurface impurity defects on laser damage resistance of beam splitter coatings 亚表面杂质缺陷对分束器涂层抗激光损伤性能的影响

IF 4.8 1区物理与天体物理

High Power Laser Science and Engineering Pub Date : 2023-05-25 DOI: 10.1017/hpl.2023.37

Wenyun Du, Meiping Zhu, Jun Shi, Tianbao Liu, Jian Sun, Kui Yi, J. Shao

{"title":"Effect of subsurface impurity defects on laser damage resistance of beam splitter coatings","authors":"Wenyun Du, Meiping Zhu, Jun Shi, Tianbao Liu, Jian Sun, Kui Yi, J. Shao","doi":"10.1017/hpl.2023.37","DOIUrl":"https://doi.org/10.1017/hpl.2023.37","url":null,"abstract":"Abstract The laser-induced damage threshold (LIDT) of plate laser beam splitter (PLBS) coatings is closely related to the subsurface absorption defects of the substrate. Herein, a two-step deposition temperature method is proposed to understand the effect of substrate subsurface impurity defects on the LIDT of PLBS coatings. Firstly, BK7 substrates are heat-treated at three different temperatures. The surface morphology and subsurface impurity defect distribution of the substrate before and after the heat treatment are compared. Then, a PLBS coating consisting of alternating HfO2–Al2O3 mixture and SiO2 layers is designed to achieve a beam-splitting ratio (transmittance to reflectance, s-polarized light) of approximately 50:50 at 1053 nm and an angle of incidence of 45°, and it is prepared under four different deposition processes. The experimental and simulation results show that the subsurface impurity defects of the substrate migrate to the surface and accumulate on the surface during the heat treatment, and become absorption defect sources or nodule defect seeds in the coating, reducing the LIDT of the coating. The higher the heat treatment temperature, the more evident the migration and accumulation of impurity defects. A lower deposition temperature (at which the coating can be fully oxidized) helps to improve the LIDT of the PLBS coating. When the deposition temperature is 140°C, the LIDT (s-polarized light, wavelength: 1064 nm, pulse width: 9 ns, incident angle: 45°) of the PLBS coating is 26.2 J/cm2, which is approximately 6.7 times that of the PLBS coating deposited at 200°C. We believe that the investigation into the laser damage mechanism of PLBS coatings will help to improve the LIDT of coatings with partial or high transmittance at laser wavelengths.","PeriodicalId":54285,"journal":{"name":"High Power Laser Science and Engineering","volume":"22 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78907791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Nonlinear chirped pulse amplification for a 100-W-class GHz femtosecond all-fiber laser system at 1.5 $unicode{x3bc}$ m 1.5 $unicode{x3bc}$ m下100 w级GHz飞秒全光纤激光系统的非线性啁啾脉冲放大

IF 4.8 1区物理与天体物理

High Power Laser Science and Engineering Pub Date : 2023-05-25 DOI: 10.1017/hpl.2023.36

Yixuan Fan, Hao Xiu, Wei Lin, Xuewen Chen, Xu Hu, Wenlong Wang, Junpeng Wen, Hao Tian, Molei Hao, Chiyi Wei, Luyi Wang, Xiaoming Wei, Zhong-zhu Yang

{"title":"Nonlinear chirped pulse amplification for a 100-W-class GHz femtosecond all-fiber laser system at 1.5 \u0000$unicode{x3bc}$\u0000 m","authors":"Yixuan Fan, Hao Xiu, Wei Lin, Xuewen Chen, Xu Hu, Wenlong Wang, Junpeng Wen, Hao Tian, Molei Hao, Chiyi Wei, Luyi Wang, Xiaoming Wei, Zhong-zhu Yang","doi":"10.1017/hpl.2023.36","DOIUrl":"https://doi.org/10.1017/hpl.2023.36","url":null,"abstract":"Abstract In this work, we present a high-power, high-repetition-rate, all-fiber femtosecond laser system operating at 1.5 \u0000$unicode{x3bc}$\u0000 m. This all-fiber laser system can deliver femtosecond pulses at a fundamental repetition rate of 10.6 GHz with an average output power of 106.4 W – the highest average power reported so far from an all-fiber femtosecond laser at 1.5 \u0000$unicode{x3bc}$\u0000 m, to the best of our knowledge. By utilizing the soliton-effect-based pulse compression effect with optimized pre-chirping dispersion, the amplified pulses are compressed to 239 fs in an all-fiber configuration. Empowered by such a high-power ultrafast fiber laser system, we further explore the nonlinear interaction among transverse modes LP01, LP11 and LP21 that are expected to potentially exist in fiber laser systems using large-mode-area fibers. The intermodal modulational instability is theoretically investigated and subsequently identified in our experiments. Such a high-power all-fiber ultrafast laser without bulky free-space optics is anticipated to be a promising laser source for applications that specifically require compact and robust operation.","PeriodicalId":54285,"journal":{"name":"High Power Laser Science and Engineering","volume":"85 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90252234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generation of a curved plasma channel from a discharged capillary for intense laser guiding 放电毛细管产生弯曲等离子体通道，用于强激光引导

IF 4.8 1区物理与天体物理

High Power Laser Science and Engineering Pub Date : 2023-05-25 DOI: 10.1017/hpl.2023.40

Jian-Long Li, Boyuan Li, X. Zhu, Zewu Bi, X. Wen, Lin Lu, Xiao-Hui Yuan, Feng Liu, Min Chen

{"title":"Generation of a curved plasma channel from a discharged capillary for intense laser guiding","authors":"Jian-Long Li, Boyuan Li, X. Zhu, Zewu Bi, X. Wen, Lin Lu, Xiao-Hui Yuan, Feng Liu, Min Chen","doi":"10.1017/hpl.2023.40","DOIUrl":"https://doi.org/10.1017/hpl.2023.40","url":null,"abstract":"Abstract Straight plasma channels are widely used to guide relativistic intense laser pulses over several Rayleigh lengths for laser wakefield acceleration. Recently, a curved plasma channel with gradually varied curvature was suggested to guide a fresh intense laser pulse and merge it into a straight channel for staged wakefield acceleration [Phys. Rev. Lett. 120, 154801 (2018)]. In this work, we report the generation of such a curved plasma channel from a discharged capillary. Both longitudinal and transverse density distributions of the plasma inside the channel were diagnosed by analyzing the discharging spectroscopy. Effects of the gas-filling mode, back pressure and discharging voltage on the plasma density distribution inside the specially designed capillary are studied. Experiments show that a longitudinally uniform and transversely parabolic plasma channel with a maximum channel depth of 47.5 μm and length of 3 cm can be produced, which is temporally stable enough for laser guiding. Using such a plasma channel, a laser pulse with duration of 30 fs has been successfully guided along the channel with the propagation direction bent by 10.4°.","PeriodicalId":54285,"journal":{"name":"High Power Laser Science and Engineering","volume":"8 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75246941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Inertial confinement fusion ignition achieved at the National Ignition Facility – an editorial 在国家点火装置上实现惯性约束聚变点火-一篇社论

IF 4.8 1区物理与天体物理

High Power Laser Science and Engineering Pub Date : 2023-04-27 DOI: 10.1017/hpl.2023.38

C. Danson, L. Gizzi

引用次数: 1

Monitoring and characterization of particle contamination in the pulse compression chamber of the OMEGA EP laser system 欧米茄EP激光系统脉冲压缩室中粒子污染的监测与表征

IF 4.8 1区物理与天体物理

High Power Laser Science and Engineering Pub Date : 2023-04-20 DOI: 10.1017/hpl.2023.34

B. Hoffman, N. Savidis, S. Demos

{"title":"Monitoring and characterization of particle contamination in the pulse compression chamber of the OMEGA EP laser system","authors":"B. Hoffman, N. Savidis, S. Demos","doi":"10.1017/hpl.2023.34","DOIUrl":"https://doi.org/10.1017/hpl.2023.34","url":null,"abstract":"Abstract The laser-damage performance of optics is known to be negatively affected by microscale particle contamination induced by the operational environment. This work investigates the properties of particles accumulating in various locations near critical optics inside the OMEGA EP grating compressor chamber during quarterly operational periods over a 2-year duration. The particles found were characterized using optical microscopy, scanning electron microscopy and energy dispersive X-ray spectroscopy. The analysis indicates significant concentrations of micrometer- to nanometer-scale particles inside the vacuum chamber, with higher values observed near the port leading to the OMEGA EP target chamber. The distribution of the chemical composition of these particles varies between collection periods. Although understanding of the mechanisms of particle generation and transport remains uncertain, the hypothesis is that this particle load represents a risk for contaminating the surfaces of high-value optics located inside the chamber, including the compression gratings and deformable mirrors, and therefore affecting their laser-damage resistance and overall operational lifetime.","PeriodicalId":54285,"journal":{"name":"High Power Laser Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89247178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Parametric amplification as a single-shot time-resolved off-harmonic probe for laser–matter interactions 参数放大作为激光-物质相互作用的单次时间分辨非谐波探头

IF 4.8 1区物理与天体物理

High Power Laser Science and Engineering Pub Date : 2023-04-16 DOI: 10.1017/hpl.2023.32

F. Grepl, M. Tryus, T. Chagovets, D. Margarone

引用次数: 0

High-power 1560 nm single-frequency erbium fiber amplifier core-pumped at 1480 nm – ERRATUM 高功率1560nm单频铒光纤放大器核心泵浦在1480nm -更正

IF 4.8 1区物理与天体物理

High Power Laser Science and Engineering Pub Date : 2023-04-11 DOI: 10.1017/hpl.2023.29

Xin Cheng, Zhiquan Lin, Xuezong Yang, Shuizhen Cui, Xin Zeng, Huawei Jiang, Yan Feng

引用次数: 0

Pulse repetition-rate effect on the intensity inside a femtosecond laser filament in air 脉冲重复率对空气中飞秒激光灯丝内部强度的影响

IF 4.8 1区物理与天体物理

High Power Laser Science and Engineering Pub Date : 2023-03-30 DOI: 10.1017/hpl.2023.31

Fukang Yin, J. Long, Yaoxiang Liu, Yingxia Wei, B. Zhu, Kainan Zhou, Tie-Jun Wang, Y. Leng, Ruxin Li

引用次数: 0