Influence of phase and amplitude distortions of initial beam profile on the characteristics of filamentation domain

2019 ◽  
Author(s):  
D. V. Apeksimov ◽  
P. A. Babushkin ◽  
A. A. Zemlyanov ◽  
A. M. Kabanov ◽  
G. G. Matvienko ◽  
...  
Keyword(s):  
Beam Profile ◽  
Initial Beam

scholarly journals Evolution of rectangular and triangular initial beam profiles in positive Kerr local medium

2020 ◽  
Vol 1 (1) ◽  
pp. 13-17
Author(s):  
M. Hesami ◽  
M. Avazpour ◽  
M. M. Méndez Otero ◽  
J. Jesús Arriaga Rodríguez
Keyword(s):  
Initial Step ◽  
Beam Profile ◽  
Spatial Soliton ◽  
Kerr Medium ◽  
Third Order ◽  
Focusing Effect ◽  
Initial Beam ◽  
Self Focusing ◽  
Matlab Program ◽  
Local Medium

The hyperbolic secant (Sech) shape, as the initial beam profile, is the well-know profile that compensates the diffraction and self-focusing effect during propagation in Kerr medium, and evolves as the bright spatial soliton. The Sech beam can be confined in the Kerr medium andinduces its own waveguide. In this work, two initial beam profiles, rectangular and triangular functions, that are different than Sech profile, are considered, and the propagation of these beam profiles in third-order nonlinear (Kerr) medium is investigated. As a result, the initialbeam-width played an important role in confining the beam profiles in direction of propagation. In addition, the intensity profiles change to the Sech profile after some initial step of propagation. All the calculations and simulations have been done by the Split-Step numericalmethod with MATLAB program.

Development of x-ray beam profile monitor based on in-house grown crystal and application in electron beam imaging

2020 ◽  
Author(s):  
Mohit Tyagi ◽  
P. S. Sarkar ◽  
R. S. Sengar ◽  
Ashwani Kumar ◽  
Jagannath ◽  
...  
Keyword(s):  
Electron Beam ◽  
Grown Crystal ◽  
Beam Profile ◽  
X Ray ◽  
Beam Profile Monitor

scholarly journals Reply to “Comment on `Uniformization of the transverse beam profile by means of nonlinear focusing method’”

2008 ◽  
Vol 11 (3) ◽  
Author(s):  
Yosuke Yuri ◽  
Nobumasa Miyawaki ◽  
Tomihiro Kamiya ◽  
Watalu Yokota ◽  
Kazuo Arakawa ◽  
...  
Keyword(s):  
Beam Profile ◽  
Transverse Beam ◽  
Nonlinear Focusing

scholarly journals Shaping Beam Profiles Using Plastic Optical Fiber Tapers with Application to Ice Sensors

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2503
Author(s):  
Kostas Amoiropoulos ◽  
Georgia Kioselaki ◽  
Nikolaos Kourkoumelis ◽  
Aris Ikiades
Keyword(s):  
Fiber Optics ◽  
Optical Fibers ◽  
Laser Cooling ◽  
Detection Efficiency ◽  
Numerical Aperture ◽  
Beam Profile ◽  
Hollow Beam ◽  
Enhanced Sensitivity ◽  
Surface Irregularities ◽  
Plastic Optical Fibers

Using either bulk or fiber optics the profile of laser beams can be altered from Gaussian to top-hat or hollow beams allowing enhanced performance in applications like laser cooling, optical trapping, and fiber sensing. Here, we report a method based on multimode Plastic Optical Fibers (POF) long-tapers, to tweak the beam profile from near Gaussian to a hollow beam, by generating surface irregularities on the conical sections of the taper with a heat-and-pull technique. Furthermore, a cutback technique applied on long tapers expanded the output beam profile by more than twice the numerical aperture (NA) of the fiber. The enhanced sensitivity and detection efficiency of the extended profile was tested on a fiber optical ice sensor related to aviation safety.

Shaping the beam profile of a partially coherent beam by a phase aperture

2011 ◽  
Vol 284 (18) ◽  
pp. 4129-4135 ◽  
Author(s):  
Gaofeng Wu ◽  
Yangjian Cai ◽  
Jun Chen
Keyword(s):  
Coherent Beam ◽  
Beam Profile ◽  
Partially Coherent

A novel beam-profile monitor for storage rings

1993 ◽  
Vol 333 (2-3) ◽  
pp. 288-293 ◽  
Author(s):  
T. Quinteros ◽  
R. Schuch ◽  
M. Pajek ◽  
P. Sigray ◽  
H. Cederquist ◽  
...  
Keyword(s):  
Storage Rings ◽  
Beam Profile ◽  
Beam Profile Monitor
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