Sensitivity optimization of the one beam Z-scan technique and a Z-scan technique immune to nonlinear absorption

Opt Express. 2013 Jul 1;21(13):15350-63. doi: 10.1364/OE.21.015350.


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.

Publication types

  • Research Support, Non-U.S. Gov't