The mobile ultrafast high energy laser facility - A new facility for high-intensity atmospheric laser propagation studies

Thul, Daniel; Bernath, Robert; Bodnar, Nathan; Kerrigan, Haley; Reyes, Danielle; Pena, Jessica; Roumayah, Patrick; Shah, Lawrence; Maukonen, D.; Bradford, Joshua; Baudelet, Matthieu; Fairchild, Shermineh Rostami; Richardson, Martin

doi:10.1016/j.optlaseng.2020.106519

Cited by 14 publications

(4 citation statements)

References 39 publications

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“…Laser filaments generated by ultrashort pulse (USP) lasers are ideal for many long range, outdoor applications. Filaments can deliver high intensities to kilometer scale distances 1 – 3 , propagate through turbulence 4 , and reform after interacting with aerosols 5 . These properties, among others, make filaments an excellent candidate for applications like microwave guiding 6 , 7 , white light LIDAR 8 , standoff laser induced breakdown spectroscopy (LIBS) 9 – 11 , cloud condensation 12 , 13 , and cloud cutting 14 .…”

Section: Introductionmentioning

confidence: 99%

Filamentation in low pressure conditions

Pena

Reyes

Richardson

2022

Sci Rep

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Filamentation is favorable for many long-range outdoor laser applications, some of which require propagation to or at high altitudes. Understanding how the filamentation process and filament properties are impacted by the low pressure conditions present at high altitudes is essential in designing effective applications. The scaling of filament preconditions with pressure is considered. An increase in critical power and decrease in transition numerical aperture (NA) is predicted to occur with a drop in pressure, indicating that nonlinear pulse propagation and filamentation at high altitudes requires higher energy and a longer assisted focal length than sea level filamentation. A summary of pressure-scaled filament properties is also presented. New simulations demonstrate filamentation at pressures as low as 0.0035 atm (38.5 km altitude) is possible.

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Section: Introductionmentioning

confidence: 99%

Filamentation in low pressure conditions

Pena

Reyes

Richardson

2022

Sci Rep

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“…These remote modifications to the air via filaments are ideal for atmospheric applications. [2][3][4][5][6] Therefore, the generation and evolution of the precursor species during filaments are essential to reveal the laser-induced molecular synthesis relating to atmospheric chemistry and filament application. Previous studies were mainly devoted to the discussion about the filament-induced atmospheric nitrogen chemistry.…”

Section: Introductionmentioning

confidence: 99%

Measurement of CO, HCN, and NO productions in atmospheric reaction induced by femtosecond laser filament

HUANG¹,

Zhang²,

Deng³

et al. 2022

Chinese Phys. B

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We have proved that the chemical reaction induced by femtosecond laser filament in the atmosphere produces CO, HCN and NO, and the production CO and HCN were observed for the first time. The concentrations of the products were measured by mid-infrared tunable laser absorption spectroscopy. In reduced pressure air, the decomposition of CO2 was enhanced by vibration excitation induced by laser filament, resulting in enhanced production of CO and HCN. At the same time, the generated CO and HCN from the atmosphere suffered rotation excitation induced by laser filament, enhancing their absorption spectra. We found NO, CO, and HCN accumulating to 134 ppm, 80 ppm, and 1.6 ppm in sealed air after sufficient reaction time. The atmospheric chemical reaction induced by laser filament opens up a way to change the air composition while maintaining environmental benefits.

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“…Одной из основных прикладных задач является развитие методов управления филаментации. При этом наряду с задачей управления началом филаментации, что может быть достигнуто на основе обычной фокусировки [3,4], стоит также задача контроля длины области филаментации и управления статистическими свойствами излучения, такими как статистическая дисперсия разброса цента тяжести светового пучка как в продольном, так и в поперечном направлении, интегральные размеры всего пучка (эффективный размер пучка) и размеры области филаментации.…”

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“…Теоретический анализ на данный момент развития теории представляется возможным провести лишь численными методами [1][2][3][4][5]. Наиболее полное теоретическое описание возможно на основе нестационарных моделей, в которых искомые световые поля заданы в пространстве и времени.…”

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Влияние Топологического Заряда Вихревого Светового Пучка Мощного Фемтосекундного Излучения На Статистические Характеристики Геометрии Области Филаментации В Турбулентной Атмосфере

Землянов¹,

Булыгин²

2022

XXVIII Международный Симпозиум «Оптика Атмосферы И Океана. Физика Атмосферы»

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На основе численного эксперимента рассмотрено влияние вида начального профиля на начало и окончания филаментации в турбулентной среде. Показано, что начало и длина филаментации в зависимости от начального профиля амплитуды лазерного пучка с увеличением топологического заряда может как отдаляться, так и приближаться, при этом длина филаментации уменьшается с ростом топологического заряда. Статистическая дисперсия разброса продольных границ филаментации с увеличением топологического заряда монотонно уменьшается, в свою очередь дисперсия поперечного разброса не имеет однозначной зависимости от величины топологического заряда.

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The mobile ultrafast high energy laser facility - A new facility for high-intensity atmospheric laser propagation studies

Cited by 14 publications

References 39 publications

Filamentation in low pressure conditions

Filamentation in low pressure conditions

Measurement of CO, HCN, and NO productions in atmospheric reaction induced by femtosecond laser filament

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