中国激光, 2010, 37 (8): 1956, 网络出版: 2010-08-13
飞秒激光诱导Ni等离子体发射光谱的实验研究
Experimental Investigation on Emission Spectra of Femtosecond Laser-Induced Ni Plasmas
飞秒激光等离子体 时间分辨光谱 电子温度 斯塔克展宽和线移 femtosecond laser-induced plasmas time-resolved emission spectrum electron temperature Stark broadening and Stark shift
摘要
在大气环境下利用脉宽为30 fs,波长为800 nm的飞秒激光,测定了激光诱导Ni等离子体的时间分辨发射光谱。由测定的谱线相对强度得到了等离子体的电子温度以及电子温度的时间演化特性。同时,还测定了等离子体中Ni原子发射光谱线斯塔克展宽和斯塔克线移的时间演化特性。结果表明,当延时在110-610 ns范围内变化时,等离子体的电子温度变化范围为7500-4500 K,这与纳秒激光诱导等离子体的动力学特性有很大的不同。
Abstract
The time-resolved emission spectrum of laser induced Ni plasma is measured at atmospheric pressure using a femtosecond laser with pulse width of 30 fs and wavelength of 800 nm. The electron temperature of Ni plasmas and its temporal evolution are obtained through the relative intensity of Ni emission spectrum lines. In addition,the temporal evolution of Stark broadening and Stark shift of the spectrum lines are also obtained. It is shown that the electron temperature varies from 7500 to 4500 K when the time delay is in the range from 110 to 610 ns,which is different with the dynamic characteristics of nanosecond laser induced plasmas.
樊建梅, 姚关心, 张先燚, 季学韩, 郑荣儿, 崔执凤. 飞秒激光诱导Ni等离子体发射光谱的实验研究[J]. 中国激光, 2010, 37(8): 1956. Fan Jianmei, Yao Guanxin, Zhang Xianyi, Ji Xuehan, Zheng Rong′er, Cui Zhifeng. Experimental Investigation on Emission Spectra of Femtosecond Laser-Induced Ni Plasmas[J]. Chinese Journal of Lasers, 2010, 37(8): 1956.
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