Nonlinear beam shaper for femtosecond laser pulses, from Gaussian to flat-top profile

Brigitte Mercier 1 Jean-Philippe Rousseau 1 A. Jullien 1 Laura Antonucci 1, 2
1 LOA - Laboratoire d'optique appliquée
2 LOB - Laboratoire d'optique et biosciences
Abstract : We present a straightforward method to transform a spatially Gaussian femtosecond laser beam into a flattop shaped beam. The proposed technique takes advantage of a nonlinear phase induced in positive Kerr medium followed by a simple optical system. The variation of the refractive index with the laser intensity creates a phase plate which induces changes in the beam profile after propagation; flat-top and doughnut profiles are observed. The shaping conditions are computed numerically and confirmed experimentally. The method does not introduce energy losses. The device is very simple, self-regulated, flexible and does not need a manufactured phase plate or precise alignment. This method can be useful for light-matter interaction and laser machining. Cop 2010 Elsevier B.V. All rights reserved.
Document type :
Journal articles
Complete list of metadatas
https://hal-polytechnique.archives-ouvertes.fr/hal-00805075
Contributor : Denis Roura <>
Submitted on : Wednesday, April 3, 2013 - 9:44:31 PM
Last modification on : Wednesday, July 3, 2019 - 10:48:01 AM

Identifiers

Collections

CNRS | X-LOA | X-LOB | X | ENSTA_LOA | PARISTECH | ENSTA | X-DEP-PHYS | X-DEP-BIO

Citation

Brigitte Mercier, Jean-Philippe Rousseau, A. Jullien, Laura Antonucci. Nonlinear beam shaper for femtosecond laser pulses, from Gaussian to flat-top profile. Optics Communications, Elsevier, 2010, 283 (14), pp.2900. ⟨10.1016/j.optcom.2010.04.004⟩. ⟨hal-00805075⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

314

Contact

CCSD