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Journal Articles Optics Letters Year : 2006

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

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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Dates and versions

hal-00554196 , version 1 (10-01-2011)

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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, 2006, 31 (14), pp.2214-2216. ⟨10.1364/OL.31.002214⟩. ⟨hal-00554196⟩
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