We studied the spatial beam profile of a high peak power, ultra-short laser pulse passing through a diffractive beam shaping system. In theoretical simulation, we considered the effects of both group velocity dispersion and nonlinear self-phase modulation on the reshaped beam profile. The output spatial and temporal intensity profile of a 100-fs laser pulse at different energy levels is calculated. We also present the experimental result of the fluence profile at the beam shaping system's target plane for a 1-mJ, 100-fs near infrared laser pulse which is generated from a multi-pass laser amplification system.
We extended the study of a diffractive laser beam shaping system which is originally designed for continuous waves (SPIE vol. 2863, pp 237-45, 1996). The beam profile of an ultra-short laser pulse passing through this optical system is calculated. Two different numerical methods, Monte Carlo and Gaussian method, are applied to this problem. We find that the Gaussian method yields better results because the step size algorithms used in this method are well suited for this specific problem. The Gaussian numerical simulation shows that the fluence still yields a top-hat radial distribution. Beam shaping of ultra-short laser pulses using this optical scheme is feasible.
Conference Committee Involvement (6)
Laser Beam Shaping XII
21 August 2011 | San Diego, California, United States
Laser Beam Shaping XI
2 August 2010 | San Diego, California, United States
Laser Beam Shaping X
3 August 2009 | San Diego, California, United States
Laser Beam Shaping IX
11 August 2008 | San Diego, California, United States
Laser Beam Shaping VIII
28 August 2007 | San Diego, California, United States
Laser Beam Shaping VII
13 August 2006 | San Diego, California, United States
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