Blue continuously pumped upconversion lasing in Tm:YLiF4
- 25 May 1992
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 60 (21) , 2592-2594
- https://doi.org/10.1063/1.106919
Abstract
Blue upconversion laser operation in Tm:YLiF4 at 450.2 nm on the 1D2→3F4 transition, and at 483.0 nm on the 1G4→3H6 transition has been achieved using cw pumping with Ti Sapphire and DCM dye lasers. The 450.2‐nm laser was excited by sequential two‐photon absorption with 784.5‐nm and 648‐nm laser sources and was operated at temperatures up to 70 K. The 483.0‐nm laser was pumped with a single red‐dye laser using a wavelength resonant only with absorption from a metastable intermediate state but not with absorption from the ground state. With this avalanche absorption pumping scheme, 483.0‐nm laser emission was observed up to 160 K.Keywords
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