2026-10-14T15:58:45Z https://www.scidb.cn/oai

10.57760/sciencedb.37097 2026-06-08T11:35:35Z

2026-06-08 A Slice Model for Two-Photon Absorption Fitting Formula in Z-Scan with Large F-number Focusing doi:10.57760/sciencedb.37097 en We propose a slice model to optimize the two-photon absorption (2PA) fitting formula for Z-scan technique, addressing the theoretical defect of conventional formulas, which neglect the influence of nonlinear absorption component on light intensity variation when calculating linear absorption component. This defect is negligible in conventional Z-scan setups with small F-number focusing but must be considered in large F-number focusing configurations where sample thickness is increased for engineering applications. We derive generalized equations describing energy variation and transmittance for any number of equal slices, and verify the model via Z-scan data of deuterated potassium dihydrogen phosphate (DKDP) samples irradiated by a 515 nm femtosecond laser, confirming its reliability Z-scan; DKDP crystal; Nonlinear absorption Xianghui Li Yafei Lian Yuanan Zhao Xun Sun Mingxia Xu Jianda Shao EMBARGO https://creativecommons.org/licenses/by-nc-sa/4.0/ dataset Science Data Bank