title: Sensitivity optimization of the one beam Z-scan technique and a Z-scan technique immune to nonlinear absorption.
abstract: It is presented a criteria for selecting the optimum aperture radius for the one beam Z-scan technique (OBZT), based on the analysis of the transmittance of the aperture. It is also presented a modification to the OBZT by directly measuring the beam radius in the far field with a rotating disk, which allows to determine simultaneously the non-linear absorptive coefficient and non-linear refractive index, much less sensitive to wave front distortions caused by inhomogeneities of the sample with a negligible loss of signal to noise ratio. It is demonstrated its equivalence to the OBZT.
authors.affiliation: Benemérita Universidad Autónoma de Puebla, Facultad de Ciencias de la Electrónica Av. San Claudio y 18 Sur. Col San Manuel, Puebla, Puebla. 72570, México. jpintle@ece.buap.mx
authors.forename: José A
authors.initials: JA
authors.lastname: Dávila Pintle
authors.forename: Edmundo Reynoso
authors.initials: ER
authors.lastname: Lara
authors.forename: Marcelo D
authors.initials: MD
authors.lastname: Iturbe Castillo