Formation and propagation of meter-scale laser filaments in water
Formation and propagation of meter-scale laser filaments in water
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DOI：
10.1063/1.4821447
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发表时间：
2013-09-16
影响因子：
4
通讯作者：
Ting, A.
中科院分区：
文献类型：
--
作者：
Helle, M. H.;Jones, T. G.;Ting, A.
我们报道了使用纳秒脉冲激光对米级水下光丝进行演示、表征和建模的过程。我们观察到P/P-Crit=1-5的单丝形成，其中P-Crit类似于水中的1 mW。我们使用变距离水管来表征激光脉冲的演化和细丝的形成。均匀半径为50+/-10微米的细丝持续了55厘米(>；35瑞利长度)。观察到并表征了显著的前向受激拉曼散射(高达60%)。对传播距离和传播半径的模拟结果与实验符合较好，并预测了峰值密度为1.5×10(18)cm(-3)的结构等离子体。
We report the demonstration, characterization, and modeling of meter-scale underwater optical filaments using a nanosecond pulsed laser. We observed single filament formation for P/P-CRIT = 1-5, where P-CRIT similar to 1 MW in water. We employed a variable distance water tube to characterize laser pulse evolution and filament formation. Filaments with uniform radius 50 +/- 10 mu m persisted for 55 cm (>35 Rayleigh lengths). Significant forward Stimulated Raman Scattering (up to 60%) was observed and characterized. Simulation results for propagation distances and radii were in agreement with experiment, and predict a structured plasma with peak density of 1.5 x 10(18) cm(-3).