Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-26T07:54:25.110Z Has data issue: false hasContentIssue false
  • English
  • Français

Study of stimulated Brillouin scattering in extended paraxial region

Published online by Cambridge University Press:  22 March 2012

Prerana Sharma ,
A.K. Bhardwaj  and
R.P. Sharma
Prerana Sharma*
Affiliation:
Physics Department, Ujjain Engineering College, Ujjain, India
A.K. Bhardwaj
Affiliation:
N. S. C. B. Government Post Graduate College, Biaora, India
R.P. Sharma
Affiliation:
Centre for Energy Studies, IIT, New Delhi, India
*
Address correspondence and reprint requests to: Prerana Sharma, Physics Department, Ujjain Engineering College, Ujjain, M. P. 465010, India. E-mail: preranaiitd@rediffmail.com
Get access Rights & Permissions [Opens in a new window]

Abstract

This communication presents a comparison of two cases to study the process of laser beam propagation and Stimulated Brillouin Scattering (SBS) in laser plasma interaction. These two cases are, with imposing the restriction of paraxial approximation on the laser beam and, relaxing this restriction up to a certain extent. In this work, the study done by Sharma et al. (2009) using paraxial approximation is extended by taking contribution of the off-axial rays in the laser beam profile. The spitted profile of the laser beam is obtained due to uneven focusing of the off-axial rays and its effect on localization of the ion acoustic wave (IAW) has been studied. Including the off-axial part of the laser beam semi-analytical solution of the nonlinear coupled IAW equation has been found and this is examined that off-axial part affects background densities. The nonlinear coupling between the laser beam and IAW is severely affected by modified profile of the laser beam. Further, it is investigated that the SBS is also influenced by this coupling process. Therefore, the reflectivity of SBS has been compared with and without contribution of off-axial rays. A notable change is found in the magnitude of SBS reflectivity in modified-paraxial case in comparison to the paraxial case.

Keywords

Ion acoustic waveOff-axial raysParaxial approximationStimulated Brillouin scattering
Type
Research Article
Information
Laser and Particle Beams , Volume 30 , Issue 2 , June 2012 , pp. 207 - 213
Copyright
Copyright © Cambridge University Press 2012

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Akhmanov, A.S., Sukhorukov, A.P. & Khokhlov, R.V. (1968). Self-focusing and diffraction of light in a nonlinear medium. Soviet. Phys. Usp. 10, 609–636.CrossRefGoogle Scholar
Badiei, Shahriar, Andersson Patrik, U. & Holmlid, Leif. (2010). Laser-driven nuclear fusion D + D in ultra-dense deuterium: MeV particles formed without ignition. Laser Part. Beams 28, 313–317.CrossRefGoogle Scholar
Badziak, J., Jaboski, S., Parys, P., Szydowski, A., Fuchs, J. & Mancic, A. (2010). Production of high-intensity proton fluxes by a 2 Nd:glass laser beam. Laser Part. Beams 28, 575–583.CrossRefGoogle Scholar
Baldis, H.A., Villeneuve, D.M., Fontaine, B. La., Enright, G.D., Labaune, C., Baton, S., Mounaix, Ph., Pesme, D., Casanova, M. & Rozmus, W. (1993). Stimulated Brillouin scattering in picoseconds time scale: Experiments and modeling. Phys. Fluids B 5, 3319–3327.CrossRefGoogle Scholar
Bari, M.A., Sheng, Z.M., Wang, W.M., Li, Y.T., Salahuddin, M., Nasim, M.H., Shabbir Naz, G., Gondal, M.A. & Zhang, J. (2010). Optimization for deuterium ion acceleration in foam targets by ultra-intense lasers. Laser Part. Beams 28, 333–341.CrossRefGoogle Scholar
Gao, W, Lu, Z.W., Wang, S.Y., He, W.M. & Hasi, W.L.J. (2010). Measurement of stimulated Brillouin scattering threshold by the optical limiting of pump output energy. Laser Part. Beams 28, 179–184.CrossRefGoogle Scholar
Hasi, W.L.J., Gong, S., Lu, Z.W., Lin, D.Y., He, W.M. & Fan, R.Q. (2008). Generation of plasma wave and third harmonic generation at ultra relativistic laser power. Laser Part. Beams 26, 511–516.CrossRefGoogle Scholar
Huller, S., Masson-Laborde, P.E., Pesme, D., Labaune, C. & Bandulet, H. (2008). Modeling of stimulated Brillouin scattering in expanding plasma. J. Phys. 112, 022031.Google Scholar
Kappe, P., Strasser, A. & Ostermeyer, M. (2007). Investigation of the impact of SBS- parameters and loss modulation on the mode locking of an SBS- laser oscillator. Laser Part. Beams 25, 107–116.CrossRefGoogle Scholar
Rozmus, W., Sharma, R.P., Samson, J.C. & Tighe, W. (1987). Nonlinear evolution of stimulated Raman scattering in homogeneous plasmas. Phys Fluids 30, 2181–2193.CrossRefGoogle Scholar
Sharma, R.P., Sharma, Prerana, Rajput, Shivani & Bhardwaj, A.K. (2009). Suppression of stimulated Brillouin scattering in laser beam hot spots. Laser Part. Beams 27, 619–627.CrossRefGoogle Scholar
Sharma, Prerana & Sharma, R.P. (2009). Suppression of stimulated Raman scattering due to localization of electron plasma wave in laser beam filaments. Phys. plasmas 16, 032301.CrossRefGoogle Scholar
Sharma, R.P., Sharma, Prerana & Chauhan, P.K. (2007). Effect of laser beam filamentation on plasma wave localization and electron heating. Phys. Plasmas 14, 103112.CrossRefGoogle Scholar
Starodub, A.N., Borisenko, N.G., Fronya, A.A., Merkuliev, Yu.A., Osipov, M.V., Puzyrev, V.N., Sahakyan, A.T., Vasin, B.L. & Yakushev, O.F. (2010). Aerogel foil plasma: Forward scattering, back scattering, and transmission of laser radiation. Laser Part. Beams 28, 371–375.CrossRefGoogle Scholar
Sodha, M.S., Ghatak, A.K. & Tripathi, V.K. (1976). Self focusing of laser beams in plasmas and semiconductors. Prog. Opt. E 3, 169–265.CrossRefGoogle Scholar
Wang, Y.L., Lu, Z.W., He, W.M., Zheng, Z.X. & Zhao, Y.H. (2009). A new measurement of stimulated Brillouin scattering phase conjugation fidelity for high pump energies. Laser Part. Beams 27, 297–302.CrossRefGoogle Scholar
Yang, X.H., Ma, YY., Shao, F.Q., Xu, H., Yu, M.Y., Gu, Y.Q., Yu, T.P., Yin, Y., Tian, C.L. & Kawata, S. (2010). Collimated proton beam generation from ultraintense laser-irradiated hole target. Laser Part. Beams 28, 319–325.CrossRefGoogle Scholar