Nonlinear characterization of materials using the D4 sigma method inside a Z-scan 4f-system

作者：Boudebs Georges^*; Besse Valentin; Cassagne Christophe; Leblond Herve; de Araujo Cid B

来源：Optics Letters, 2013, 38(13): 2206-2208.

DOI：10.1364/OL.38.002206

We show that direct measurement of the beam radius in Z-scan experiments using a CCD camera at the output of a 4f-imaging system allows higher sensitivity and better accuracy than Baryscan. One of the advantages is to be insensitive to pointing instability of pulsed lasers because no hard (physical) aperture is employed as in the usual Z-scan. In addition, the numerical calculations involved here and the measurement of the beam radius are simplified since we do not measure the transmittance through an aperture and it is not subject to mathematical artifacts related to a normalization process, especially when the diffracted light intensity is very low.

• 出版日期2013-7-1