F. Ramaz, R.M. Macfarlane, et al.
Journal of Luminescence
Paper
551 nm Diode-Laser-Pumped Upconversion Laser
Abstract
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.
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