title: Femtosecond laser writing of Er3+-doped CaF2 crystalline patterns in glass.
abstract: We report on the use of 800 nm, 250 kHz femtosecond laser pulses to precipitate Er(3+)-doped CaF(2) crystals inside oxyfluoride glass, which was confirmed with x-ray diffraction analysis. Confocal upconversion luminescence spectra show that the precipitated crystals have greatly enhanced upconversion luminescence intensity in comparison with unmodified glass. We demonstrate the possibility of three-dimensional optical data storage in the glass by the use of the confocal upconversion luminescence imaging.
authors.affiliation: State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China.
authors.forename: Yin
authors.initials: Y
authors.lastname: Liu
authors.forename: Bin
authors.initials: B
authors.lastname: Zhu
authors.forename: Ye
authors.initials: Y
authors.lastname: Dai
authors.forename: Xvsheng
authors.initials: X
authors.lastname: Qiao
authors.forename: Song
authors.initials: S
authors.lastname: Ye
authors.forename: Yu
authors.initials: Y
authors.lastname: Teng
authors.forename: Qingtian
authors.initials: Q
authors.lastname: Guo
authors.forename: Hongliang
authors.initials: H
authors.lastname: Ma
authors.forename: Xianping
authors.initials: X
authors.lastname: Fan
authors.forename: Jianrong
authors.initials: J
authors.lastname: Qiu