Femtosecond laser writing of Er3+-doped CaF2 crystalline patterns in glass.
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.
Liu
Yin
Y
State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China.
Zhu
Bin
B
Dai
Ye
Y
Qiao
Xvsheng
X
Ye
Song
S
Teng
Yu
Y
Guo
Qingtian
Q
Ma
Hongliang
H
Fan
Xianping
X
Qiu
Jianrong
J