Using a short-pulse diffraction-limited laser beam to probe filamentation of a random phase plate smoothed beam

2008 ◽  
Vol 79 (10) ◽  
pp. 10F551 ◽  
Author(s):  
J. L. Kline ◽  
D. S. Montgomery ◽  
K. A. Flippo ◽  
R. P. Johnson ◽  
H. A. Rose ◽  
...  
Keyword(s):  
Laser Beam ◽  
Short Pulse ◽  
Random Phase ◽  
Phase Plate

scholarly journals Implementation of a phase plate for the generation of homogeneous focal-spot intensity distributions at the high-energy short-pulse laser facility PHELIX

2019 ◽  
Vol 7 ◽  
Author(s):  
V. Bagnoud ◽  
J. Hornung ◽  
M. Afshari ◽  
U. Eisenbarth ◽  
C. Brabetz ◽  
...  
Keyword(s):  
Short Pulse ◽  
Random Phase ◽  
High Energy ◽  
Phase Plate ◽  
Work Related ◽  
Nanosecond Lasers ◽  
Short Pulse Laser ◽  
Laser Facility ◽  
Ultrashort Pulse Lasers ◽  
Phase Plates

We propose and demonstrate the use of random phase plates (RPPs) for high-energy sub-picosecond lasers. Contrarily to previous work related to nanosecond lasers, an RPP poses technical challenges with ultrashort-pulse lasers. Here, we implement the RPP near the beginning of the amplifier and image-relay it throughout the laser amplifier. With this, we obtain a uniform intensity distribution in the focus over an area 1600 times the diffraction limit. This method shows no significant drawbacks for the laser and it has been implemented at the PHELIX laser facility where it is now available for users.

Laser beam smoothing by rotating random phase plate

1998 ◽  
Author(s):  
Qiang Lin ◽  
Xiaoqing Jiang ◽  
Jingmin Zhu ◽  
Xuanhui Lu ◽  
Shaomin Wang
Keyword(s):  
Laser Beam ◽  
Random Phase ◽  
Phase Plate

Use of a random phase plate as a KrF laser beam homogenizer for thin film deposition applications

1999 ◽  
Vol 70 (4) ◽  
pp. 2116-2121 ◽  
Author(s):  
C. L. S. Lewis ◽  
I. Weaver ◽  
L. A. Doyle ◽  
G. W. Martin ◽  
T. Morrow ◽  
...  
Keyword(s):  
Thin Film ◽  
Laser Beam ◽  
Random Phase ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Phase Plate ◽  
Krf Laser ◽  
Beam Homogenizer

scholarly journals TRANSFORMATION CHARACTERISTICS OF LASER BEAM THROUGH A RANDOM PHASE PLATE

1999 ◽  
Vol 48 (10) ◽  
pp. 1891
Author(s):  
XIAO JUN ◽  
LV BAI-DA ◽  
ZHANG BIN
Keyword(s):  
Laser Beam ◽  
Random Phase ◽  
Phase Plate

Probing of a random phase object by a focused spatially modulated laser beam. Integral scanning method

1999 ◽  
Vol 25 (12) ◽  
pp. 971-973 ◽  
Author(s):  
V. P. Ryabukho ◽  
A. A. Chausskii ◽  
A. E. Grinevich
Keyword(s):  
Laser Beam ◽  
Random Phase ◽  
Phase Object ◽  
Scanning Method

scholarly journals Beam-smoothing effect in broad-band random-phase irradiation

1993 ◽  
Vol 11 (2) ◽  
pp. 385-390 ◽  
Author(s):  
I. Matsushima ◽  
Y. Owadano ◽  
Y. Matsumoto ◽  
I. Okuda ◽  
T. Tomie ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Optical System ◽  
Random Phase ◽  
Broad Band ◽  
Laser Fusion ◽  
Phase Plate ◽  
Smoothing Effect ◽  
Broad Bandwidth ◽  
A New Technique ◽  
Focusing Lens

A new technique to achieve smooth laser irradiation profiles on laser fusion targets is evaluated numerically and experimentally. In this technique, smoothing is obtained by using a spectral dispersing optic and a random-phase plate placed in front of a focusing lens employing the broad-bandwidth of KrF lasers. Experimental results and numerical calculations agree well, verifying that this simple optical system is effective for smooth irradiation on targets.

Laser wander effect in turbulence simulation system with random phase plate

2011 ◽  
Vol 23 (8) ◽  
pp. 2044-2036
Author(s):  
甘新基 Gan Xinji ◽  
郭劲 Guo Jin ◽  
徐抒岩 Xu Shuyan
Keyword(s):  
Random Phase ◽  
Simulation System ◽  
Phase Plate ◽  
Turbulence Simulation

scholarly journals Dynamics of UV short pulse laser-induced plasmas from a ceramic material “titanium carbide”: a hydrodynamical out of equilibrium investigation

2019 ◽  
Vol 37 (01) ◽  
pp. 86-100
Author(s):  
A. Ait Oumeziane ◽  
J-D. Parisse
Keyword(s):  
Laser Beam ◽  
Ceramic Material ◽  
Material Properties ◽  
Atmospheric Pressure ◽  
Short Pulse ◽  
Plume Expansion ◽  
Pure Material ◽  
Short Pulse Laser ◽  
Helium Gas ◽  
Ionization Rates

AbstractThe present work is motivated by the numerous applications of short lasers–ceramics interaction. It aims at applying a newly developed model to investigate the dynamic of laser-induced plasmas from a ceramic material into a helium gas under atmospheric pressure. To have a better understanding of the link between the material properties, the plume characteristics and its interaction with the laser beam, a thorough examination of the entire ablation processes is conducted. Comparison with the behavior of laser-induced plumes under the same conditions from a pure material is shown to have a key role in shedding the light on what monitors the plume expansion in the background environment. Plume temperatures, velocities, ionization rates as well as elemental composition have been presented and compared under carefully chosen relevant conditions. This study is of interest for laser matter applications depending on the induced plasmas dynamics and composition.

Design and analysis of a novel random phase plate for uniform illumination

1998 ◽  
Author(s):  
Zengshui Liu ◽  
Runwen Wang ◽  
Huijie Huang ◽  
Dunwu Lu
Keyword(s):  
Random Phase ◽  
Phase Plate ◽  
Uniform Illumination
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