A novel method to adjust the spatio-temporal superposition between two femtosecond laser pulses
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Corresponding author:
HU Bi-tao, hubt@lzu.edu.cn
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Received Date:
2012-07-10
Accepted Date:
2012-09-25
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Abstract
To achieve accurate spatio-temporal superposition between two femtosecond laser pulses,a CCD imaging system was used to adjust the spatial superposition of both the beams and an energy meter was applied to measure the core energy of the probe pulses so that the temporal separation between the pulses could be adjusted.The dependence of the core energy on the time delay and the corresponding plasma fluorescence distribution were obtained.The experimental result proves that this method can achieve a higher time accuracy(femtosecond scale) than the traditional method,even when the crossing angle between the two femtosecond laser beams is vertical.
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References
[1]
|
LIU W J,LI H J,QU Sh L,et al.Femtosecond pulse compre-ssion in external cavity[J].Laser Technology,2007,31(6):665-667(in Chinese). |
[2]
|
SHI L P,LI W X,WANG Y D,et al.Generation of high-density electrons based on plasma grating induced Bragg diffraction in air[J].Physics Review Letters,2011,107(9):095004. |
[3]
|
YIN F,TAO X Y.Acceleration of relativistic electrons in Gaussian laser electromagnetic field[J].Laser Technology,2011,35(3):384-387(in Chinese). |
[4]
|
CHIN S L,HOSSEINI S A,LIU W,et al.The propagation of powerful femtosecond laser pulses in optical media:physics,applications,and new challenges[J].Canadian Journal of Physics,2005,83(9):863-905. |
[5]
|
SHENG Z M,ZHANG J,UMSTADTER D.Plasma density gratings induced by intersecting laser pulses in underdense plasmas[J].Journal of Applied Physics,2003,B77(6/7):673-680. |
[6]
|
CORKUM P B,ROLLAND C.Supercontinuum generation in gases[J].Physics Review Letters,1986,57(18):2268-2271. |
[7]
|
NIBBERING E T J,CURLEY P F,GRILLON G,et al.Conical emission from self-guided femtosecond pulses in air[J].Optics Letters,1996,21(1):62-65. |
[8]
|
STRICKLAND D,MOUROU G.Compression of amplified chirped optical pulses[J].Optics Communications,1985,56(3):219-221. |
[9]
|
LIU X L,SUN Sh H,REN Zh G,et al.Micro-displacement measurement system of pulse equivalent and return difference of a stepping motor[J].Laser Technology,2011,35(5):603-605(in Chinese). |
[10]
|
KASPARIAN J,SAUERBREY R,CHIN S L.The critical laser intensity of self-guided light filaments in air[J].Journal of Applied Physics,2000,B71(6):877-879. |
[11]
|
KOSAREVA O G,LIU W,PANOV N A,et al.Can we reach very high intensity in air with femtosecond PW laser pulses[J].Laser Physics,2009,19(8):1776-1792. |
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Proportional views
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