A Comparison of Paraxial and Extended Paraxial Approach in Laser Propagation and Second Harmonic Generation

• Authors: P. Sharma
• Languages of publication: EN

Abstracts

EN

The propagation of laser beam in the plasma has been investigated for two cases, first with imposing the restriction of paraxial approximation on the beam profile, and second, relaxing the restriction on the profile up to a certain extent. The beam width parameter of the propagating laser beam has been compared for both the cases. Since the off-paraxial part of the beam affects background densities, consequently it will also influence the 2nd harmonic generation. Therefore, comparison of results has been done on the generated second harmonic, in the light of these two cases. A notable change is found in the magnitude of second harmonic yield in modified-paraxial case as compared to the paraxial case.

Keywords

EN

52.38.-r; 52.38.Hb; 52.38.Mf

Discipline

• 52.38.Mf: Laser ablation(see also 79.20.Ds, Laser-beam impact phenomena)
• 52.38.-r: Laser-plasma interactions(for plasma production and heating by laser beams, see 52.50.Jm)
• 52.38.Hb: Self-focussing, channeling, and filamentation in plasmas

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 1
• Pages: 122-127

Dates

published

2012-07

received

2011-12-07

(unknown)

2012-04-25

Contributors

author

P. Sharma

• Ujjain Engineering College, Ujjain (M.P.) - 465010, India

References

• 1. M.S. Sodha, A. Sharma, Phys. Plasmas 14, 044501 (2007)
• 2. S.A. Akhmanov, A.P. Sukhorukov, K.V. Khokhlov, Sov. Phys. Uspekhi 10, 609 (1968); also Usp. Fiz. Nauk 93, 19 (1967)
• 3. P. Sharma, S.T. Mahmud, M.K. Gupta, R.P. Sharma, IEEE Trans. Plasma Sci. 37, 2158 (2009)
• 4. R. Gupta, P. Sharma, P.K. Chauhan, M. Rafat, R.P. Sharma, Phys. Plasma 16, 043101 (2009)
• 5. R.P. Sharma, P. Sharma, P.K. Chauhan, Phys. Plasma 14, 103112 (2007)
• 6. P. Sharma, S.T. Mahmood, M.K. Gupta, R.P. Sharma, Phys. Plasma 15, 042105 (2008)
• 7. A. Pukhov, Z.-M. Sheng, J. Meyer-ter-Vehn, Phys. Plasma 6, 2847 (1999)
• 8. J.A. Stamper, R.H. Lehmberg, A. Schmitt, M.J. Herbst, F.C. Young, J.H. Gardner, S.P. Obenschain, Phys. Fluids 28, 2563 (1985)
• 9. J. Meyer, Y. Zhu, Phys. Fluids 30, 890 (1987)
• 10. M.S. Sodha, A.K. Ghatak, V.K. Tripathi, Prog. Opt. 13, 171 (1976a)

Identifiers

DOI

10.12693/APhysPolA.122.122