Spectral and Temporal Properties of 1ωo, 2ωo and 3/2ωo Emission from Laser-Produced Plasmas

  • R. Dragila
  • B. Luther-Davies
  • R. A. Maddever


This paper summarises the results of an extensive study of the spectral and temporal properties of emission from laser-produced plasmas at the fundamental (1ωo), second harmonic (2ωo), and three-halves harmonic (3/2ωo). Some of the results have been presented in detail in recent publications1,2. In the experiments short pulses (20–400psec) of 1.053 μm radiation from a Nd:glass laser were focussed to high intensity (1014 – 1017W/cm2) using an F=l lens onto planar targets of glass, aluminium or lead. The observation of two common features of the spectra at all frequencies motivated this work. Firstly it was found that all time integrated spectra contain apparently random spectral modulations with the spectral width of these modulations simply reflecting the resolution of the recording system. Fourier analysis of the spectral envelope demonstrated that the modulations had the characteristic of “pink noise”, that is the power spectrum of the modulations decayed smoothly to high modulation frequencies. A consequence of this characteristic is that if the recording system has poor spectral resolution, there will be a distinct impression that the spectra consists of a few well defined spectral peaks. However, as the resolution is improved, it will be found that these apparently well defined peaks develop more and more substructure and eventually become unrecognisable.


Laser Intensity Heating Radiation Stimulate Brillouin Scattering Streak Camera Burst Duration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. 1.
    R. Dragila, R.A.M. Maddever, and B. Luther-Davies, Phys. Rev. A, 36, 5292 (1987).CrossRefGoogle Scholar
  2. 2.
    R.A.M. Maddever, B. Luther-Davies, and R. Dragila, accepted in Phys. Rev. A.Google Scholar
  3. 3.
    N.E. Andreev, V.P. Silin, and G.L. Stenchikov, Zh. Eksp. Teor. Fiz. 78, 1396 (1980); [Sov. Phys. JETP 51, 703 (1980)]Google Scholar
  4. N.E. Andreev, G. Auer, K. Baumgartel, and K. Sauer, Phys. Fluids 24, 1492 (1981).CrossRefMATHGoogle Scholar
  5. 4.
    K. Baumgartel and K. Sauer, Phys. Rev. A 26, 3031 (1982)CrossRefGoogle Scholar
  6. C.J. Randall and J.R. Albritton, in Laser Program Annual Report, Lawrence Livermore National Laboratory UCRL-50021-82, 3–45 (1982).Google Scholar
  7. 5.
    T.J.H. Pattikangas and R.R.E. Salomaa, unpublished.Google Scholar
  8. 6.
    N.S. Erokhin, S.S. Moiseev, and V.V. Mukhin, Nucl. Fus. 14, 333 (1974)CrossRefGoogle Scholar
  9. L.M. Gorbunov and A.N. Polyanchev, Zh. Eksp. Theor. Fiz. 74, 552 (1978); [Sov. Phys. JETP 47, 290 (1978)].Google Scholar
  10. 7.
    V.V. Kurin, Fiz. Plazmy 10, 418 (1984); [Sov. J. Plasma Phys. 10, 245 (1984)].Google Scholar
  11. 8.
    V.V. Kurin and G.V Permitin, Fiz. Plazmy 8, 365 (1982); [Sov. J. Plasma Phys. 8, 207 (1982)].Google Scholar
  12. 9.
    V.V. Kurin and G.V. Permitin, Fiz. Plazmy 5, 1084 (1979); [Sov. J. Plasma Phys. 5, 607 (1979)].Google Scholar
  13. 10.
    R._L. Bryer, in Nonlinear Optics, (P. G. Harper and B. S. Wherrett, Eds.) Academic Press (London 1977), p.47.Google Scholar
  14. 11.
    H. Sugai, R. Hatakeyama, K. Saeki, and M. Inutake, Phys. Fluids 19, 1753 (1976).CrossRefGoogle Scholar
  15. 12.
    W.M. Manheimer, Phys. Fluids 20, 265 (1977).CrossRefGoogle Scholar
  16. 13.
    M.D.J. Burgess, R. Dragila, B. Luther-Davies, K.A. Nugent, and G.J. Tallents, Laser Interaction and Related Plasma Phenomena, (HJ. Schwarz and H. Hora, Eds.) Plenum, (N.Y. and London 1984), Vol.6, p. 461.Google Scholar
  17. 14.
    P.A. Jaanimagi, G.D. Enright, and M.C. Richardson, IEEE Trans. Plasma Sci. PS-7, 166 (1979).CrossRefGoogle Scholar
  18. 15.
    V.Yu. Baranov, M.F. Kanevskiy, S.M. Kozochkin, D.D. Malyuta, Yu.A. Satov, and A.P. Streltsov, unpublished.Google Scholar
  19. 16.
    Zunqi Lin, O. Willi, R.G. Evans, and J. Szechi, Rutherford Laboratory Report RL-82-106 (1982).Google Scholar
  20. 17.
    E. McGoldrick and S.M.L. Sim, Opt. Comm. 40, 433 (1982).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1991

Authors and Affiliations

  • R. Dragila
    • 1
  • B. Luther-Davies
    • 1
  • R. A. Maddever
    • 1
  1. 1.Laser Physics Centre, Research School of Physical SciencesThe Australian National UniversityCanberraAustralia

Personalised recommendations