利用光丝诱导荧光光谱测量单质碘升华过程
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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341.6nm(D→X~1Σ_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。
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 341.6nm(the D→X~1Σ_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.
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 341.6nm(the D→X~1Σ_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.
引文
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[24]Bernhardt J,Liu W,Théberge F,et al.Spectroscopic analysis of femtosecond laser plasma filament in air[J].Optics Communications,2008,281(5):1268-1274.
[25]Wang T J,Xu H L,Daigle J,et al.Water vapor concentration measurement in air using filament-induced fluorescence spectroscopy[J].Optics Letters,2012,37(10):1706-1708.
[2]Liang Yanjun.Applications of hypervalent iodine reagents in the synthesis methodology of heterocycles[D].Changchun:Changchun University of Science&Technology,2012:10-16.梁艳君.高碘化合物在杂环合成方法学中的应用[D].长春:长春理工大学,2012:10-16.
[3]Xu H L,Cheng Y,Chin S L,et al.Femtosecond laser ionization and fragmentation of molecules for environmental sensing[J].Laser&Photonics Reviews,2015,9(3):275-293.
[4]Xu H L,Sun H B.Femtosecond laser 3Dfabrication of whispering-gallery-mode microcavities[J].Science China Physics,Mechanics&Astronomy,2015,58(11):114202.
[5]Sheetz K E,Squier J.Ultrfast optics:Imaging and manipulating biological systems[J].Journal of Applied Physics,2009,105(5):051101.
[6]Pan Huaihai,Wang Zhuo,Fan Wenzhong,et al.Superhydrophobic titanium surface micro/nanostructures induced by femtosecond laser[J].Chinese J Lasers,2016,43(8):0802002.泮怀海,王卓,范文中,等.飞秒激光诱导超疏水钛表面微纳结构[J].中国激光,2016,43(8):0802002.
[7]Liu Shuang,Tang Wenlong,Cheng Guanghua.Er3+:water-freefluorotellurite glass waveguides written by femtosecond laser[J].Acta Optica Sinica,2015,35(4):0413001.刘爽,唐文龙,程光华.飞秒激光在掺Er3+无水"氟碲酸盐玻璃中写入光波导[J].光学学报,2015,35(4):0413001.
[8]Chin S L,Wang T J,Marceau C,et al.Advances in intense femtosecond laser filamentation in air[J].Laser Physics,2011,22(1):1-53.
[9]Couairon A,Mysyrowicz A.Femtosecond filamentation in transparent media[J].Physics Reports,2007,441(2-4):47-189.
[10]Berge L,Skupin S,Nuter R,et al.Ultrashort filaments of light in weakly ionized,optically transparent media[J].Reports on Progress Physics,2007,70(10):1633-1713.
[11]Kaparian J,Rodríguez M,Méjean G,et al.White-light filaments for atmospheric analysis[J].Science,2003,301(5629):61-64.
[12]Xu H L,Chin S L.Femtosecond laser filamentation for atmospheric sensing[J].Sensors,2011,11(1):32-53.
[13]Xu H L,Kamali Y,Marceau C,et al.Simultaneous detection and identification of multigas pollutants using filamentinduced nonlinear spectroscopy[J].Applied Physics Letters,2007,90(10):101106.
[14]Kasparian J,Ackermann R,AndréY B,et al.Progress towards lightning control using lasers[J].Journal of the European Optical Society Rapid Publications,2008,3(8):08035.
[15]Li H L,Xu H L,Yang B S,et al.Sensing combustion intermediates by femtosecond filament excitation[J].Optics Letters,2013,38(8):1250-1252.
[16]Chu W,Li H,Ni J,et al.Lasing action induced by femtosecond laser filamentation in ethanol flame for combustion diagnosis[J].Applied Physics Letters,2014,104(9):091106.
[17]Luo Q,Liu W,Chin S L.Lasing action in air induced by ultra-fast laser filamentation[J].Applied Physics B,2003,76(3):337-340.
[18]Yao J,Zeng B,Xu H,et al.High-brightness switchable multiwavelength remote laser in air[J].Physical Review A,2011,84(5):051802.
[19]Dogariu A,Michael J B,Scully M O,et al.High-gain backward lasing in air[J].Science,2011,331(6016):442-445.
[20]Wei X Y,Tu Z W,Liu C,et al.Differentiation of positional isomers of propyl alcohols using filament-induced fluorescence[J].Chinese Physics Letters,2016,33(5):054201.
[21]Pearse R W B,Gaydon A G.The identification of molecular spectra[M].London:Chapman and Hall,1976:187-188.
[22]Xu H L,Azarm A,Bernhardt J,et al.The mechanism of nitrogen fluorescence inside a femtosecond laser filament in air[J].Chemical Physics,2009,360(1):171-175.
[23]Xu H L,Li R X,Chin S L.Photoemission mechanisms of methane in intense laser fields[J].Chinese Optics Letters,2015,13(7):070007.
[24]Bernhardt J,Liu W,Théberge F,et al.Spectroscopic analysis of femtosecond laser plasma filament in air[J].Optics Communications,2008,281(5):1268-1274.
[25]Wang T J,Xu H L,Daigle J,et al.Water vapor concentration measurement in air using filament-induced fluorescence spectroscopy[J].Optics Letters,2012,37(10):1706-1708.