title: Z-scan measurement of the nonlinear refractive index of Nd(3+), Y(3+)-codoped CaF(2) and SrF(2) crystals.
abstract: By performing the Z-scan measurements at 800 nm using a femtosecond pulsed laser, we are able to characterize the nonlinear refractive indices of Nd, Y codoped CaF(2) and SrF(2) crystals. Based on our measured results, we conclude that the doped fluoride crystal possesses a small nonlinear refractive index and the doping of Nd(3+) and Y(3+) ions in CaF(2) can change its third-order nonlinear index, but the contribution is minor. The doped fluoride crystal may have large potential to be developed as the next generation of gain material for a high-energy laser system.
authors.forename: Yue
authors.initials: Y
authors.lastname: Guo
authors.forename: Shunbin
authors.initials: S
authors.lastname: Lu
authors.forename: Liangbi
authors.initials: L
authors.lastname: Su
authors.forename: Chujun
authors.initials: C
authors.lastname: Zhao
authors.forename: Han
authors.initials: H
authors.lastname: Zhang
authors.forename: Shuangchun
authors.initials: S
authors.lastname: Wen