title: Wavefront retrieval of amplified femtosecond beams by second-harmonic generation.
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.
authors: Departamento de Física Aplicada, Universidad de Salamanca, E-37008 Salamanca, Spain. rociobv@usal.es
authors: Rocío
authors: R
authors: Borrego-Varillas
authors: Carolina
authors: C
authors: Romero
authors: Javier R
authors: JR
authors: Vázquez de Aldana
authors: Juan M
authors: JM
authors: Bueno
authors: Luis
authors: L
authors: Roso