Adaptive correction of a tightly focused, high-intensity laser beam by use of a third-harmonic signal generated at an interface

Thomas A. Planchon 1 W. Amir 1 J. J. Field 1 C. G. Durfee 1 J. A. Squier 1 Pascal Rousseau 2 Olivier Albert 3 Gérard Mourou 3
1 Colorado School of Mines
2 CUOS - Center for Ultrafast Optical Sciences
3 LOA - Laboratoire d'optique appliquée
Abstract : By using the third-harmonic signal generated at an air-dielectric interface, we demonstrate a novel way of correcting wavefront aberrations induced by high-numerical-aperture optics. The third harmonic is used as the input physical parameter of a genetic algorithm working in closed loop with a 37-actuator deformable mirror. This method is simple and reliable and can be used to correct aberrations of tightly focused beams, a regime where other methods have limitations. Improvement of the third-harmonic signal generated with an f/1.2 parabolic mirror by 1 order of magnitude is demonstrated.
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Submitted on : Monday, January 10, 2011 - 2:32:15 PM
Last modification on : Wednesday, August 7, 2019 - 2:34:15 PM

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

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Thomas A. Planchon, W. Amir, J. J. Field, C. G. Durfee, J. A. Squier, et al.. Adaptive correction of a tightly focused, high-intensity laser beam by use of a third-harmonic signal generated at an interface. Optics Letters, Optical Society of America, 2006, 31 (14), pp.2214-2216. ⟨10.1364/OL.31.002214⟩. ⟨hal-00554196⟩

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