D.P. Burum, R.M. Macfarlane, et al.
Physics Letters A
Green laser emission at 551 nm was achieved in LiYF4: Er3+ by upconversion pumping with a near-infra-red diode laser at low temperature. Using a 2mm-long monolithic laser crystal the lasing threshold was reached with 34 mW of absorbed power from an AlGaAs diode-laser array. © 1989, The Institution of Electrical Engineers. All rights reserved.
D.P. Burum, R.M. Macfarlane, et al.
Physics Letters A
W.P. Risk, G.M. Loiacono
Applied Physics Letters
A.J. Silversmith, W. Lenth, et al.
Applied Physics Letters
D.M. Burland, U. Konzelmann, et al.
The Journal of Chemical Physics