Open AccessUltrabroadband continuum spectrum generated in Ar gas
Author(s) -
Liping Zhang,
Haining Li,
Hong Wang,
Xian Liang,
Liang’en Ding
Publication year - 2008
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.57.904
Subject(s) - supercontinuum , optics , physics , pulse (music) , chirp , wavelength , pulse duration , femtosecond , filamentation , materials science , laser , photonic crystal fiber , detector
We observed the supercontinuum in Ar during the propagation of a femtosecond pulse with wavelength of 800nmrepetition rate of 10Hz and pulse duration of 30fs. We studied the supercontinuum when changing the chirp of the pulsepulse energypressure in the cell and the focal length to find the optimal conditions. And we observed the steady broadest supercontinuum extending up to 200nm with the pulse of 20mJ energe29×104fs2 chirps when the focal length was 500mm and the pressure of the cell was 23×105Pa. We measured the far-field pattern of the continuum and found the divergence angle of the white light to be 31mrad.