scholarly journals Hundred-Joule-level, nanosecond-pulse Nd:glass laser system with high spatiotemporal beam quality

2016 ◽  
Vol 4 ◽  
Author(s):  
Sensen Li ◽  
Yulei Wang ◽  
Zhiwei Lu ◽  
Lei Ding ◽  
Yi Chen ◽  
...  
Keyword(s):  
Pulse Width ◽  
Frequency Conversion ◽  
Beam Quality ◽  
Laser System ◽  
Energy Output ◽  
Level Energy ◽  
Beam Diameter ◽  
System Operating ◽  
Nd:Glass Laser

A 100-J-level Nd:glass laser system in nanosecond-scale pulse width has been constructed to perform as a standard source of high-fluence-laser science experiments. The laser system, operating with typical pulse durations of 3–5 ns and beam diameter 60 mm, employs a sequence of successive rod amplifiers to achieve 100-J-level energy at 1053 nm at 3 ns. The frequency conversion can provide energy of 50-J level at 351 nm. In addition to the high stability of the energy output, the most valuable of the laser system is the high spatiotemporal beam quality of the output, which contains the uniform square pulse waveform, the uniform flat-top spatial fluence distribution and the uniform flat-top wavefront.

scholarly journals 1178 J, 527 nm near diffraction limited laser based on a complete closed-loop adaptive optics controlled off-axis multi-pass amplification laser system

2021 ◽  
Vol 9 ◽  
Author(s):  
Deen Wang ◽  
Xin Zhang ◽  
Wanjun Dai ◽  
Ying Yang ◽  
Xuewei Deng ◽  
...  
Keyword(s):  
Laser Beam ◽  
Adaptive Optics ◽  
Closed Loop ◽  
Focal Spot ◽  
Beam Quality ◽  
Laser System ◽  
Diffraction Limit ◽  
Kdp Crystal ◽  
Main Amplifier

Abstract A 1178 J near diffraction limited 527 nm laser is realized in a complete closed-loop adaptive optics (AO) controlled off-axis multi-pass amplification laser system. Generated from a fiber laser and amplified by the pre-amplifier and the main amplifier, a 1053 nm laser beam with the energy of 1900 J is obtained and converted into a 527 nm laser beam by a KDP crystal with 62% conversion efficiency, 1178 J and beam quality of 7.93 times the diffraction limit (DL). By using a complete closed-loop AO configuration, the static and dynamic wavefront distortions of the laser system are measured and compensated. After correction, the diameter of the circle enclosing 80% energy is improved remarkably from 7.93DL to 1.29DL. The focal spot is highly concentrated and the 1178 J, 527 nm near diffraction limited laser is achieved.

scholarly journals Frequency doubling of multi-terawatt picosecond pulses

1999 ◽  
Vol 17 (2) ◽  
pp. 281-286 ◽  
Author(s):  
D. NEELY ◽  
C.N. DANSON ◽  
R. ALLOTT ◽  
F. AMIRANOFF ◽  
J.L. COLLIER ◽  
...  
Keyword(s):  
Beam Quality ◽  
Laser System ◽  
Frequency Doubling ◽  
Crystal Thickness ◽  
Small Aperture ◽  
Picosecond Pulses ◽  
Large Aperture ◽  
Spot Quality

The frequency-doubling efficiency and resultant focal spot quality of a large aperture (140 × 89 mm) subpicosecond, chirped pulse amplified (CPA) 1054-nm beam for laser–matter interaction studies has been investigated using the Vulcan Nd:glass laser system (Danson et al. 1998). The effect of B-integral on the CPA beam quality was studied and is shown not to be the dominant cause of the observed frequency-doubled beam break-up. Conversion efficiency tests were carried out on small aperture KDP (type 1) crystals at a range of incident intensities up to 3 × 1011 W/cm2 giving the optimum crystal thickness for pulses in the 0.3–3 ps region. A large-aperture frequency-doubled beam was commissioned and delivered pulses of over 10 TW onto target for an electron acceleration experiment.

High-stability, high-beam-quality, and pulse-width-tunable 1319  nm laser system for VISAR applications in high-power laser facilities

2020 ◽  
Vol 59 (20) ◽  
pp. 6070
Author(s):  
Qi Xiao ◽  
Xue Pan ◽  
Jiangtao Guo ◽  
Xiaoqin Wang ◽  
Jiangfeng Wang ◽  
...  
Keyword(s):  
High Power ◽  
Pulse Width ◽  
High Stability ◽  
Beam Quality ◽  
Laser System ◽  
High Power Laser ◽  
Power Laser ◽  
High Beam ◽  
High Beam Quality

Seven-terawatt Ti:sapphire laser system operating at 50 Hz with high beam quality for laser Compton femtosecond X-ray generation

2003 ◽  
Vol 76 (5) ◽  
pp. 497-503 ◽  
Author(s):  
S. Ito ◽  
H. Ishikawa ◽  
T. Miura ◽  
K. Takasago ◽  
A. Endo ◽  
...  
Keyword(s):  
Beam Quality ◽  
Laser System ◽  
High Beam ◽  
X Ray ◽  
Ti:Sapphire Laser ◽  
System Operating ◽  
High Beam Quality

Parameters of Laser Welding and their Influence of Weld Seam

2015 ◽  
Vol 818 ◽  
pp. 260-263
Author(s):  
Peter Balog ◽  
Janette Brezinová ◽  
Peter Pastorek
Keyword(s):  
Laser Welding ◽  
Automotive Industry ◽  
New Technologies ◽  
Beam Quality ◽  
Laser System ◽  
Base Material ◽  
Lap Joints ◽  
Welding Parameters ◽  
Beam Diameter ◽  
Butt Welding

Lap joints are most used joints in automotive industry. These types of welds are usually created by spot welding, but new technologies who came to automotive industry considerably do weld process faster. Paper deals with laser welding parameters and their influence of weld seams. The parameters of welding are readjusting according to shape of weld, impurities of surface and gap. Steel S500MC with thickness of 1.0 and 2.2 mm was used as the base material. For welding was used fiber laser Ytterbium Laser System YLS with power of 6000 watt from IPG Company. Research was oriented on changing weld parameters and their influence of welds quality. It was found that butt welding joints are sensitive to gap and the gap tolerances which in turn is dependent on material thickness, beam diameter, welding speed and beam quality.

Beam quality of a new-type MOPO laser system for VUV laser lithography

2004 ◽  
Author(s):  
Osamu Wakabayashi ◽  
Tatsuya Ariga ◽  
Takahito Kumazaki ◽  
Koutarou Sasano ◽  
Takayuki Watanabe ◽  
...  
Keyword(s):  
Beam Quality ◽  
Laser System ◽  
Laser Lithography ◽  
New Type

High beam quality of nanosecond Nd:YAG slab laser system with SBS-PCM

2020 ◽  
Vol 475 ◽  
pp. 126273
Author(s):  
Jianyong Ding ◽  
Guangli Yu ◽  
Chunqi Fang ◽  
Jianlei Wang ◽  
Ruilin Zheng ◽  
...  
Keyword(s):  
Beam Quality ◽  
Laser System ◽  
High Beam ◽  
Slab Laser ◽  
High Beam Quality

Improvement of the Beam Quality of a Wave-Front Dividing Beam Combined Laser System Using a Serrated Aperture

2011 ◽  
Vol 60 (1T) ◽  
pp. 112-116
Author(s):  
Seongwoo Cha ◽  
Sangwoo Park ◽  
Hong Jin Kong
Keyword(s):  
Wave Front ◽  
Beam Quality ◽  
Laser System
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