Open AccessExperimental study on emission spectra of air plasma induced by femtosecond laser pulses
Author(s) -
Zhuqing Zhu,
Xiaolei Wang
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.085205
Subject(s) - wavelength , femtosecond , laser , spectral line , emission spectrum , materials science , optics , plasma , atomic physics , pulse (music) , physics , quantum mechanics , astronomy , detector
The emission spectra produced in ambient air with focused strong femtosecond laser pulses are studied experimentally. The results show the emission spectrum presents the short-wavelength continuum spectrum with stronger intensity(cutoff wavelength 340 nm) and long-wavelength line spectrum with less weak intensity(near 800 nm). A similar spectrum shape can be acquired with fixed pulse width 50 fs and adjustable laser pulse energy. When the pulse energy is 1 mJ and the pulse width increases from 50 fs to 1ps, the peak value of continuum spectrum located in 500 nm wavelength becomes strong and gradually presents the line spectrum characteristics.