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Time-resolved dual-comb measurement of number density and temperature in a laser-induced plasma

机译:激光诱导等离子体中数密度和温度的时间分辨双梳测量

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We utilize time-resolved dual-comb spectroscopy to measure the temporal evolution of the population number densities and absorption excitation temperature of Fe in a laser-induced plasma. The spectra of three excited-state transitions of Fe around 533 nm are simultaneously measured at different time delays following laser ablation of a stainless steel sample. This Letter probes late-time behaviors of laser-induced ablation plumes during plasma cooling. The high spectral resolution and broad spectral coverage of the dual-comb technique, combined with the time-resolved measurement capability shown here, will aid in the characterization of laser induced plasmas, including species identification and molecule and particle formation that can occur at later times in the plasma evolution. (C) 2019 Optical Society of America
机译:我们利用时间分辨的双梳谱,测量激光诱导的等离子体中群体数量密度和Fe的吸收激发温度的时间演变。 在激光烧蚀的不锈钢样品之后,在不同的时间延迟在不同的时间延迟时同时测量3次激发态转变的光谱。 这封信在等离子体冷却过程中探测激光诱导的消融羽毛的后期行为。 双梳理技术的高光谱分辨率和广谱覆盖率与此处所示的时间分辨测量能力组合,将有助于激光诱导的等离子体的表征,包括物种鉴定和分子和颗粒形成,可以在后面的时间发生 在等离子体演变中。 (c)2019年光学学会

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