Structuring a laser beam subject to optical Kerr effect for improving its focusing properties

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Optique binaire pour la mise en forme spatiale de faisceaux laser IR, visible et UV

Nous montrons les possibilités de mises en forme d'amplitude et de polarisation des faisceaux laser qu'offrent quelques Eléments Optiques Diffractifs binaires simples

Transverse pseudo-nonlinear effects measured in solid-state laser materials using a sensitive time-resolved technique

We present a detailed study of the Baryscan technique, a new efficient alternative to the widespread Z-scan technique which has been demonstrated [Opt. Lett. 36:8, 2011] to reach among the highest sensitivity levels. This method is based upon the measurement of optical nonlinearities by means of beam centroid displacements with a position sensitive detector and is able to deal with any kind of lensing effect. This technique is applied here to measure pump-induced electronic refractive index changes (population lens), which can be discriminated from parasitic thermal effects by using a time-resolved Baryscan experiment. This method is validated by evaluating the polarizability variation at the origin of the population lens observed in the reference Cr3+:GSGG laser material.Conseil Regional Basse-NormandieConseil Regional BasseNormandi