Underwater acoustic wave generation by filamentation of terawatt ultrashort laser pulses

被引：30

作者：

Jukna, Vytautas ^{[1
]}

Jarnac, Amelie ^{[1
]}

Milian, Carles ^{[2
]}

Brelet, Yohann ^{[1
]}

Carbonnel, Jerome ^{[1
]}

Andre, Yves-Bernard ^{[1
]}

Guillermin, Regine ^{[3
]}

Sessarego, Jean-Pierre ^{[3
]}

Fattaccioli, Dominique ^{[4
]}

Mysyrowicz, Andre ^{[1
]}

Couairon, Arnaud ^{[2
]}

Houard, Aurelien ^{[1
]}

机构：

[1] Univ Paris Saclay, Ecole Polytech, ENSTA ParisTech, CNRS,LOA, F-91762 Palaiseau, France

[2] Univ Paris Saclay, Ecole Polytech, CNRS, Ctr Phys Theor, F-91128 Palaiseau, France

[3] CNRS, UPR 7051, Lab Mecan & Acoust, 4 Impasse Nikola Tesla,CS 40006, F-13453 Marseille 13, France

[4] DGA Tech Navales, Toulon, France

来源：

PHYSICAL REVIEW E | 2016年 / 93卷 / 06期

关键词：

FEMTOSECOND TIME SCALES; METASTABLE STATES; TRANSPARENT MEDIA; WATER; CAVITATION; ABSORPTION; NANOSECOND; THRESHOLDS; BREAKDOWN; BOUNDARY;

D O I：

10.1103/PhysRevE.93.063106

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Acoustic signals generated by filamentation of ultrashort terawatt laser pulses in water are characterized experimentally. Measurements reveal a strong influence of input pulse duration on the shape and intensity of the acoustic wave. Numerical simulations of the laser pulse nonlinear propagation and the subsequent water hydrodynamics and acoustic wave generation show that the strong acoustic emission is related to the mechanism of superfilamention in water. The elongated shape of the plasma volume where energy is deposited drives the far-field profile of the acoustic signal, which takes the form of a radially directed pressure wave with a single oscillation and a very broad spectrum.

引用

页数：10

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