scholarly journals Intramode and Fermi relaxation in CO2, their influence on multiple-pass, short-pulse energy extraction

1987 ◽  
Vol 42 (2) ◽  
pp. 103-110 ◽  
Author(s):  
R. A. Rooth ◽  
J. A. van der Pol ◽  
E. H. Haselhoff
Keyword(s):  
Pulse Energy ◽  
Short Pulse ◽  
Energy Extraction ◽  
Multiple Pass

High-pulse energy extraction with high peak power from short-pulse eye safe all-fiber laser system

2006 ◽  
Author(s):  
Matthias Savage-Leuchs ◽  
Eric Eisenberg ◽  
Anping Liu ◽  
Jason Henrie ◽  
Mark Bowers
Keyword(s):  
Fiber Laser ◽  
Pulse Energy ◽  
Peak Power ◽  
Short Pulse ◽  
Laser System ◽  
High Peak ◽  
High Peak Power ◽  
Energy Extraction ◽  
High Pulse Energy ◽  
High Pulse

Short-pulse energy extraction from a chemically pumped oxygen-iodine laser

1986 ◽  
Author(s):  
George E. Busch ◽  
K. L. Marsh ◽  
J. P. Sercel ◽  
J. D. Simpson ◽  
A. J. Twarowski ◽  
...  
Keyword(s):  
Pulse Energy ◽  
Short Pulse ◽  
Energy Extraction ◽  
Iodine Laser

Study on the mechanism of inhomogeneous microdamage in short-pulse laser processing of carbon fiber reinforced plastic

2021 ◽  
pp. 073168442098359
Author(s):  
Luyao Xu ◽  
Jiuru Lu ◽  
Kangmei Li ◽  
Jun Hu
Keyword(s):  
Carbon Fiber ◽  
Pulse Energy ◽  
Short Pulse ◽  
Heterogeneous Material ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Reinforced ◽  
Processing Efficiency ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Carbon Fiber Reinforced

In this article, a micro-heterogeneous material simulation model with carbon fiber and resin phase about laser ablation on carbon fiber reinforced plastic (CFRP) is established by Ansys. The ablation process of CFRP by nanosecond ultraviolet laser is simulated, and the mechanism of pulse energy and spot spacing on the heat-affected zone (HAZ) is studied, then the process parameters are optimized with the goal of HAZ size and processing efficiency, and finally the validity of the model is verified by experiments. It is found that the residual gradient and the width of the radial HAZ increase with the increase of the spot spacing, and the width of the axial HAZ decreases slightly with the increase of the spot spacing, which indicates the existence of the optimal spot spacing. Second, the ablation depth increases with the increase of the pulse energy, and the carbon fiber retains a relatively complete degree of exposure when the pulse energy is low, which has a certain guiding significance for the cleaning and bonding of CFRP.

Ultrashort-pulse energy-extraction measurements in XeCl amplifiers

1990 ◽  
Vol 15 (2) ◽  
pp. 118 ◽  
Author(s):  
A. J. Taylor ◽  
T. R. Gosnell ◽  
J. P. Roberts
Keyword(s):  
Pulse Energy ◽  
Ultrashort Pulse ◽  
Energy Extraction

Comparative Research on the Quality of Micro Hole in Superalloy GH2135 and Stainless Steel 420J1 by Laser Processing

2016 ◽  
Vol 703 ◽  
pp. 27-33
Author(s):  
Liang Wang ◽  
Nai Fei Ren ◽  
Yun Long Wang ◽  
Lin Zhong Zhu
Keyword(s):  
Stainless Steel ◽  
Pulse Energy ◽  
Laser Processing ◽  
Pulse Width ◽  
Laser Scanning ◽  
Short Pulse ◽  
Test Method ◽  
Repetition Frequency ◽  
Orifice Diameter

Both superalloy GH2135 and stainless steel 420J1 were used as test materials to be processed by LASERTEC 80 PowerDrill three-dimensional solid laser processing center. The microstructure of the hole was investigated by super depth of field microscope and laser scanning microscope. The front and back orifice diameter, orifice deposits and thermal effect of accumulation zone were studied. The single factor test method was used to study the influence of pulse energy, pulse width and repetition frequency on the quality of micro holes. The results showed that the front and back diameter of the holes all increase with the increase of pulse energy from 0.4J-3.9J. And the front and back aperture are increase with the increase of pulse width from 0.9ms-1.9ms. Meanwhile, the variation of the aperture and pore taper is more noticeable with the repetition frequency changed from 10Hz-60Hz. The results revealed that pulse energy is one of the biggest influence factors, large pulse energy can lead to small hole taper within a certain range, and short pulse width can reduce orifice debris and splash. Both the recast layer and microcrack were existed in the two kinds of metal materials. The quality of holes drilling in GH2135 is better than 420J1.

60-fs pulses with 1 μJ pulse energy generated by nonlinear compression of a short-pulse fiber laser

2006 ◽  
Author(s):  
F. Röser ◽  
J. Rothhardt ◽  
C. Bruchmann ◽  
T. Schreiber ◽  
A. Liem ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Pulse Energy ◽  
Short Pulse ◽  
Nonlinear Compression
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