W.P. Risk, G.M. Loiacono
CLEO 1996
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.
W.P. Risk, G.M. Loiacono
CLEO 1996
R.M. Macfarlane, M. Krantz, et al.
Physica C: Superconductivity and its applications
W.P. Risk, W. Lenth
Optics Letters
F. Ramaz, R.M. Macfarlane, et al.
Journal of Luminescence