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Chirped pulse amplification beam correction using computer generated holograms

L. IONEL1,* , C. P. CRISTESCU2

Affiliation

  1. National Institute for Laser, Plasma and Radiation Physics, Laser Department, Atomistilor Str. 409, P. O. Box MG-36, 077125 Magurele-Bucharest, Romania
  2. Department of Physics I, Faculty of Applied Sciences, Politehnica University of Bucharest, 313 Splaiul Independentei, RO-060042, Bucharest, Romania

Abstract

In this paper we present an alternative method to correct the shape of the Gaussian beam profile propagated through a chirped pulse amplification system employing computer generated holograms (CGHs). Considering the optical beam path from the experimental setup, we simulated the chirped pulse amplification Gaussian beam intensity profile using the numerical ray-tracing model from Rayica module of Mathematica. An iterative code based on Gerchberg-Saxton algorithm (GSA) was used to design computer generated holograms in order to make the correction of the aberrated Gaussian beam. The input images for GSA were generated in four distinct cases: after the stretcher and after the compressor using the dispersive element and in the same locations using an absorbent element. The results are relevant for different applications where the laser pulse shape correction is needed..

Keywords

Chirped pulse amplification, Ray-tracing, Spatial light modulator, Computer generated hologram.

Citation

L. IONEL, C. P. CRISTESCU, Chirped pulse amplification beam correction using computer generated holograms, Optoelectronics and Advanced Materials - Rapid Communications, 5, 9, September 2011, pp.906-910 (2011).

Submitted at: Sept. 2, 2011

Accepted at: Sept. 15, 2011