Artículos de revistas
Transverse pseudo-nonlinear effects measured in solid-state laser materials using a sensitive time-resolved technique
Fecha
2012Registro en:
APPLIED PHYSICS B-LASERS AND OPTICS, NEW YORK, v. 107, n. 3, Special Issue, supl. 1, Part 2, pp. 733-740, JUN, 2012
0946-2171
10.1007/s00340-012-5043-4
Autor
Godin, T.
Fromager, M.
Cagniot, E.
Poree, F.
Catunda, Tomaz
Moncorge, R.
Ait-Ameur, K.
Institución
Resumen
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.