Li Shuo, Liu Lei, Chen Rongzhang, Nelsen Bryan, Huang Xi, Lu Yongfeng, Chen Kevin
Department of Electrical and Computer Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA.
Rev Sci Instrum. 2016 Mar;87(3):033114. doi: 10.1063/1.4944856.
This paper reports the development of a compact and portable actively Q-switched Nd:YAG laser and its applications in laser-induced breakdown spectroscopy (LIBS). The laser was end-pumped by a vertical-cavity surface-emitting laser (VCSEL). The cavity lases at a wavelength of 1064 nm and produced pulses of 16 ns with a maximum pulse energy of 12.9 mJ. The laser exhibits a reliable performance in terms of pulse-to-pulse stability and timing jitter. The LIBS experiments were carried out using this laser on NIST standard alloy samples. Shot-to-shot LIBS signal stability, crater profile, time evolution of emission spectra, plasma electron density and temperature, and limits of detection were studied and reported in this paper. The test results demonstrate that the VCSEL-pumped solid-state laser is an effective and compact laser tool for laser remote sensing applications.
本文报道了一种紧凑便携的主动调Q Nd:YAG激光器的研制及其在激光诱导击穿光谱（LIBS）中的应用。该激光器由垂直腔面发射激光器（VCSEL）端面泵浦。该腔在1064 nm波长处激射，产生16 ns的脉冲，最大脉冲能量为12.9 mJ。该激光器在脉冲间稳定性和定时抖动方面表现出可靠的性能。利用该激光器对NIST标准合金样品进行了LIBS实验。本文研究并报道了LIBS信号逐次测量的稳定性、坑洼轮廓、发射光谱的时间演化、等离子体电子密度和温度以及检测限。测试结果表明，VCSEL泵浦的固态激光器是一种用于激光遥感应用的有效且紧凑的激光工具。
