Enhanced Brillouin scattering of gaussian laser beam in collisional plasma: Moment theory approach

被引:20
|
作者
Walia, Keshav [1 ]
机构
[1] DAV Univ Jalandhar, Dept Phys, Jalandhar, Punjab, India
关键词
Self-focusing; collisional plasma; ion-acoustic wave; back-reflectivity; 2ND-HARMONIC GENERATION; DIFFRACTION; IGNITION; TARGET;
D O I
10.1142/S0218863514500118
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
In the present paper, enhanced Brillouin scattering of a gaussian laser beam in a collisional plasma has been investigated with the help of moment theory approach. The pump wave (omega(0), k(0)) interacts with pre-excited ion-acoustic wave (omega, k), thereby generating a back-scattered wave (omega(0) - omega, k(0) -k). As a specific case, back scattering for which k similar or equal to 2k(0) has been discussed. Due to nonuniform heating, collisional nonlinearity arises, which leads to redistribution of carriers. As a result background plasma density profile in a direction transverse to pump beam axis is modified. Consequently, the pump beam becomes self-focused and in turn leads focusing of ion-acoustic wave and back-scattered wave under appropriate conditions. It is further observed from the analysis that focusing of waves greatly enhances the SBS back-reflectivity.
引用
收藏
页数:16
相关论文
共 50 条
  • [1] EFFECT OF SELF-FOCUSING ON STIMULATED RAMAN SCATTERING BY A GAUSSIAN LASER BEAM IN COLLISIONAL PLASMA: MOMENT THEORY APPROACH
    Walia, Keshav
    Singh, Arvinder
    [J]. JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS, 2013, 22 (03)
  • [2] ENHANCED BRILLOUIN-SCATTERING OF A GAUSSIAN LASER-BEAM FROM A PLASMA
    SODHA, MS
    UMESH, G
    SHARMA, RP
    [J]. JOURNAL OF APPLIED PHYSICS, 1979, 50 (07) : 4678 - 4684
  • [3] Stimulated Brillouin Scattering of Gaussian Laser Beam in Relativistic Plasma
    Arvinder Singh
    Keshav Walia
    [J]. Journal of Fusion Energy, 2013, 32 : 355 - 361
  • [4] Stimulated Brillouin Scattering of Gaussian Laser Beam in Relativistic Plasma
    Singh, Arvinder
    Walia, Keshav
    [J]. JOURNAL OF FUSION ENERGY, 2013, 32 (03) : 355 - 361
  • [5] Self-focusing of Gaussian Laser Beam Through Collisional Plasmas: Moment Theory Approach
    Singh, Arvinder
    Walia, Keshav
    [J]. JOURNAL OF FUSION ENERGY, 2013, 32 (04) : 422 - 425
  • [6] Self-focusing of Gaussian Laser Beam Through Collisional Plasmas: Moment Theory Approach
    Arvinder Singh
    Keshav Walia
    [J]. Journal of Fusion Energy, 2013, 32 : 422 - 425
  • [7] Enhanced Raman Scattering of Elliptical Laser Beam in a Collisional Plasma
    Singh, A.
    Walia, K.
    [J]. CONTRIBUTIONS TO PLASMA PHYSICS, 2011, 51 (09) : 788 - 797
  • [8] Enhanced Raman scattering of a rippled laser beam in a magnetized collisional plasma
    Saini, NS
    Gill, TS
    [J]. LASER AND PARTICLE BEAMS, 2004, 22 (01) : 35 - 40
  • [9] Self-Focusing of Quadruple Gaussian Laser Beam in Relativistic Plasma using Moment Theory Approach
    Pathak, Nidhi
    Agarwal, P. C.
    Dhriti, K. M.
    Kaur, Sukhdeep
    Gill, T. S.
    [J]. 2019 WORKSHOP ON RECENT ADVANCES IN PHOTONICS (WRAP), 2019,
  • [10] Propagation characteristics of non-Gaussian laser beam in a plasma with density ramp using Moment Theory Approach
    Pathak, Nidhi
    Kaur, Paramjit
    Agrawal, P. C.
    Kaur, Sukhdeep
    [J]. ADVANCES IN BASIC SCIENCES (ICABS 2019), 2019, 2142