中国激光, 2017, 44 (4): 0411001, 网络出版: 2017-04-10
利用光丝诱导荧光光谱测量单质碘升华过程
Detection of Iodine Sublimation by Filament-Induced Fluorescence Spectroscopy
光谱学 飞秒激光 光丝 碘升华 诱导荧光 特征光谱 spectroscopy femtosecond laser filament iodine sublimation induced fluorescence characteristic spectrum
摘要
利用飞秒激光大气成丝高强激光诱导荧光非线性光谱对碘单质升华过程进行了研究。研究结果发现飞秒光丝可诱导升华到空气中的碘分子产生清晰特征荧光谱。通过监测碘分子在341.6 nm(D→X1Σ+g跃迁)处的荧光谱线, 利用时间分辨测量方法观察到碘分子荧光强度随着加热温度以及测量位置与固态碘样品距离的变化而明显变化, 展示了光丝诱导荧光光谱技术应用于物态变化规律探索的可行性。
Abstract
We experimentally investigate the iodine sublimation process using nonlinear spectroscopy induced by high-intensity femtosecond laser filamentation in air. It is demonstrated that femtosecond laser filament can induce clean characteristic fluorescence emission of sublimated iodine molecules in air. By monitoring the fluorescence of the molecular iodine at 341.6 nm (the D→X1Σ+g transition), we observe by time-resolved measurements that the fluorescence signal varies as functions of the heating temperature and the distance from the measurement position to the solid iodine sample, showing the possibility of exploring the matter phase transform with femtosecond filament induced fluorescence spectroscopy.
涂志伟, 魏祥野, 刘畅, 李贺龙, 李爱武, 徐淮良. 利用光丝诱导荧光光谱测量单质碘升华过程[J]. 中国激光, 2017, 44(4): 0411001. Tu Zhiwei, Wei Xiangye, Liu Chang, Li Helong, Li Aiwu, Xu Huailiang. Detection of Iodine Sublimation by Filament-Induced Fluorescence Spectroscopy[J]. Chinese Journal of Lasers, 2017, 44(4): 0411001.