A reflective field-mapping beam shaper for creating a Gaussian intensity distribution from a uniform intensity high-energy laser beam

2004 ◽  
Author(s):  
Stephen A. Hanes ◽  
Steven M. Long
Keyword(s):  
Laser Beam ◽  
Intensity Distribution ◽  
High Energy ◽  
Field Mapping ◽  
Energy Laser ◽  
High Energy Laser

Mid-Infrared High Energy Laser Beam Sensor

2009 ◽  
Vol 36 (8) ◽  
pp. 1979-1985 ◽  
Author(s):  
杨鹏翎 Yang Pengling ◽  
冯国斌 Feng Guobin ◽  
王群书 Wang Qunshu ◽  
王振宝 Wang Zhenbao ◽  
程建平 Cheng Jianping
Keyword(s):  
Laser Beam ◽  
High Energy ◽  
Mid Infrared ◽  
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.

Three-Dimensional Finite Element Analysis of Melting in an Alloy Irradiated With a High Energy Laser Beam

2003 ◽  
Author(s):  
Bhavani Kasula ◽  
Pradip Majumdar
Keyword(s):  
Mathematical Model ◽  
Material Processing ◽  
Finite Element ◽  
Laser Beam ◽  
Molten Pool ◽  
Three Dimensional ◽  
High Energy ◽  
Convective Boundary ◽  
Energy Laser ◽  
High Energy Laser

Lasers are being widely used in the material processing industry lately. In this work, study is performed on the resluting temperature and stress distribution, the width and depth of the melt pool in the heat-affected zone during material processing with a high energy Gussian laser beam. A three-dimensional enthalphy-based mathematical model is developed to study the effect of high energy laser beam on the formation of molten pool. The mathematical model is based on a three-dimensional transient heat equation taking into consideration the power intensity of the Gussian laser beam and phase diagram of the material. A computational algorithm is implemented to evaluate the temperature distributions as well as shape and size of molten pool. The numerical solution with the applied heat flux and convective boundary conditions is obtained usign a 3-D finite element code.

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