Single-crystal YAG fiber optics for the transmission of high energy laser energy

2011 ◽  
Author(s):  
X. S. Zhu ◽  
James A. Harrington ◽  
B. T. Laustsen ◽  
L. G. DeShazer
Keyword(s):  
Single Crystal ◽  
Fiber Optics ◽  
Laser Energy ◽  
High Energy ◽  
Energy Laser ◽  
High Energy Laser

Calibration methods and calibration systems of water-absorption-type high energy laser energy meters

2014 ◽  
Vol 26 (12) ◽  
pp. 120201 ◽  
Author(s):  
魏继锋 Wei Jifeng ◽  
张卫 Zhang Wei ◽  
何均章 He Junzhang ◽  
周山 Zhou Shan ◽  
彭勇 Peng Yong ◽  
...  
Keyword(s):  
Water Absorption ◽  
Laser Energy ◽  
High Energy ◽  
Calibration Methods ◽  
Energy Laser ◽  
High Energy Laser

Simulation on the Effects of Misaligned Coupling on the Output Intensity Distribution in Water-Jet Guided Laser

2011 ◽  
Vol 211-212 ◽  
pp. 400-405 ◽  
Author(s):  
Chun Qi Li ◽  
Li Jun Yan ◽  
Yang Wang ◽  
Jing Tang
Keyword(s):  
Intensity Distribution ◽  
Laser Energy ◽  
Coupling Efficiency ◽  
High Energy ◽  
Water Jet ◽  
Energy Output ◽  
Output Intensity ◽  
Material Processing Technology ◽  
Energy Laser ◽  
High Energy Laser

Water-jet guided laser machining is a kind of material processing technology using water optical waveguide which is formed by coupling a high energy laser beam into variable-length water jet. In order to design the coupling unit and form the effective energy-jet, the research on the distribution of output intensity is beneficial to understand the structure of the coupling unit and improve the coupling efficiency of laser energy. This paper lists the different coupling misalignments in the coupling unit when laser couplings into water-jet. In this paper, the distribution of energy output intensity in water-jet guided laser is simulated with the ray trace theory under several different types of coupling misalignments with ZEMAX software, the results show that misaligned coupling provide various morphology of energy output intensity distribution: center peak morphology, ring peak morphology, and uniform peak morphology, which provides a method to optimize the energy output intensity distribution of water-jet guided laser.

Technologies and development trends of directly measuring high energy laser energy

2017 ◽  
Vol 46 (7) ◽  
pp. 706004
Author(s):  
魏继锋 Wei Jifeng ◽  
胡晓阳 Hu Xiaoyang ◽  
张 凯 Zhang Kai ◽  
孙利群 Sun Liqun
Keyword(s):  
Laser Energy ◽  
High Energy ◽  
Development Trends ◽  
Energy Laser ◽  
High Energy Laser

High-energy laser effects on carbon fiber reinforced polymer composites with a focus on perforation time

2021 ◽  
pp. 002199832098888
Author(s):  
Johannes Wolfrum ◽  
Sebastian Eibl ◽  
Ellen Oeltjen ◽  
Jens Osterholz ◽  
Matthias Wickert
Keyword(s):  
Carbon Fiber ◽  
Laser Energy ◽  
High Energy ◽  
Fiber Reinforced Polymer ◽  
Laser Spot ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Energy Laser ◽  
High Energy Laser

Commercially available carbon fiber reinforced polymer matrix composite panels (Hexply® M18-1/G939 and 8552/IM7) with different thicknesses (1-6 mm) were exposed to continuous-wave high-energy laser radiation at various laser powers up to 10 kW under static conditions. The perforation times, the size of the damaged volume and the residual compressive strengths are determined and correlated to the irradiation parameters. It is found that for the time of perforation, the damaged volume, which is approximated by a cylinder shaped model, correlates linearly with the laser energy imposed onto the sample surface. This relationship can be used for a prediction of the perforation time for various laser powers, material thicknesses and laser spot diameters. Increasing laser energy results in a decay of residual compressive strength after impact. Visual inspection as well as micro-focused computed X-ray tomography and scanning electron microscopy indicate a small area of thermal damage outside the laser spot. Additionally, infrared spectroscopy characterizes incipient heat damage most sensitively.

scholarly journals Interaction of annular-focused laser beams with solid targets

2015 ◽  
Vol 33 (3) ◽  
pp. 541-550 ◽  
Author(s):  
N.E. Andreev ◽  
M.E. Povarnitsyn ◽  
M.E. Veysman ◽  
A.YA. Faenov ◽  
P.R. Levashov ◽  
...  
Keyword(s):  
Laser Energy ◽  
Laser Pulses ◽  
Heavy Ion ◽  
High Energy ◽  
Weakly Coupled ◽  
Wide Range ◽  
Energy Laser ◽  
High Energy Laser ◽  
Hydrodynamic Code ◽  
Two Temperature

AbstractThe two-temperature, 2D hydrodynamic code Hydro–ELectro–IOnization–2–Dimensional (HELIO2D), which takes into account self-consistently the laser energy absorption in a target, ionization, heating, and expansion of the created plasma is elaborated. The wide-range two-temperature equation of state is developed and used to model the metal target dynamics from room temperature to the conditions of weakly coupled plasma. The simulation results are compared and demonstrated a good agreement with experimental data on the Mg target being heated by laser pulses of the nanosecond high-energy laser for heavy ion experiments (NHELIX) at Gesellschaft fur Schwerionenforschung. The importance of using realistic models of matter properties is demonstrated.

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