Higher-order laser beam scintillation in weakly turbulent marine atmospheric medium

2016 ◽  
Vol 33 (4) ◽  
pp. 758 ◽  
Author(s):  
Yahya Baykal
Keyword(s):  
Laser Beam ◽  
Higher Order

scholarly journals Expansion of the Laser Beam Wavefront in Terms of Zernike Polynomials in the Problem of Turbulence Testing

2021 ◽  
Vol 11 (24) ◽  
pp. 12112
Author(s):  
Alexey Rukosuev ◽  
Alexander Nikitin ◽  
Vadim Belousov ◽  
Julia Sheldakova ◽  
Vladimir Toporovsky ◽  
...  
Keyword(s):  
Spectral Analysis ◽  
Laser Radiation ◽  
Laser Beam ◽  
Standard Procedure ◽  
Higher Order ◽  
High Order ◽  
Zernike Polynomials ◽  
Taylor’S Hypothesis ◽  
Zernike Modes ◽  
Low Order

The results of a study of the wavefront distortions of laser radiation caused by artificial turbulence obtained in laboratory conditions using a fan heater are presented. Decomposition of the wavefront in terms of Zernike polynomials is a standard procedure that traditionally is used to investigate the set of existing aberrations. In addition, the spectral analysis of the wavefront dynamics makes it possible to estimate the fraction of the energy distributed between different Zernike modes. It is shown that the fraction of energy related to the low-order polynomials is higher compared to the high-order polynomials. Also, one of the consequences of Taylor’s hypothesis is confirmed—low-order aberrations are slower compared to the higher-order ones.

Higher-order paraxial theory of the propagation of ring rippled laser beam in plasma: Relativistic ponderomotive regime

2015 ◽  
Vol 22 (5) ◽  
pp. 052116 ◽  
Author(s):  
Gunjan Purohit ◽  
Priyanka Rawat ◽  
Prashant Chauhan ◽  
Saleh T. Mahmoud
Keyword(s):  
Laser Beam ◽  
Higher Order

Propagation of ellipitic Gaussian laser beam in a higher order non-linear medium

Optik ◽  
2004 ◽  
Vol 115 (11-12) ◽  
pp. 493-498 ◽  
Author(s):  
Tarsem Singh Gill ◽  
Nareshpal Singh Saini ◽  
S.S. Kaul ◽  
Arvinder Singh
Keyword(s):  
Laser Beam ◽  
Higher Order ◽  
Gaussian Laser Beam ◽  
Linear Medium ◽  
Non Linear

scholarly journals Stimulated Raman scattering of ultra intense hollow Gaussian beam in relativistic plasma

2015 ◽  
Vol 33 (3) ◽  
pp. 489-498 ◽  
Author(s):  
Prerana Sharma
Keyword(s):  
Raman Scattering ◽  
Laser Beam ◽  
Gaussian Beam ◽  
Plasma Wave ◽  
Stimulated Raman Scattering ◽  
Collisionless Plasma ◽  
Vital Role ◽  
Higher Order ◽  
Gaussian Laser Beam ◽  
Stimulated Raman

AbstractEffect of relativistic nonlinearity on stimulated Raman scattering (SRS) of laser beam propagating carrying null intensity in center [hollow Gaussian beam (HGB)] is studied in collisionless plasma. The construction of the equations is done employing the fluid theory which is developed with partial differential equation and Maxwell's equations. The phenomenon of SRS is shown along with the excitation of seed plasma wave considering relativistic nonlinearity. The power of plasma wave is observed for higher order of HGB. The Raman back reflectivity is studied numerically for various orders of hollow Gaussian laser beam (HGLB) and the numerical analysis shows that these parameters play vital role on reflectivity characteristics. It is observed that the Raman back reflectivity is less for the higher order of HGLB.

Higher-order CO_2 laser beam spot size and depth of focus determined

1981 ◽  
Vol 20 (11) ◽  
pp. 1933 ◽  
Author(s):  
James T. Luxon ◽  
David E. Parker
Keyword(s):  
Laser Beam ◽  
Spot Size ◽  
Higher Order ◽  
Depth Of Focus ◽  
Beam Spot ◽  
Beam Spot Size
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