Borrego-Varillas R, Romero C, Vázquez de Aldana JR, Bueno JM, Roso L. Wavefront retrieval of amplified femtosecond beams by second-harmonic generation.
OPTICS EXPRESS 2011;
19:22851-22862. [PMID:
22109163 DOI:
10.1364/oe.19.022851]
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Abstract
We present a new approach for wavefront characterization of near transform-limited intense femtosecond beams using the angular and spectral dependences of the second-harmonic generation conversion efficiency in uniaxial crystals. The method is applied to different aberrated beams and results are compared with the measurements performed with a commercial sensor, finding very good agreement. The phase retrieval dependence with different parameters (e.g. crystal thickness) is discussed. Successful application to sharpen intensity profiles is also demonstrated.
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