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- W2035037898 abstract "Abstract A thorough spectroscopic examination of the co-doped Yb:Ho:YSGG system was performed with the goal of achieving cw laser action on the 3 μm Ho 5I6→5I7 transition. Yb has very good pump absorption properties, and a highly efficient process transfers the excitation to the Ho upper laser level, which has a lifetime of ~400 μsec. The lower laser level lifetime can be reduced from 9msec to 1.5 msec by the addition of 2% Eu as a deactivator without adversely affecting the upper laser level population. An undesirable upconversion process was discovered, though its effect can be minimised using high Yb and Ho concentrations, as these make the energy transfer rate so fast that it dominates the upconversion rate. The ideal composition derived from our studies is 50% Yb:8% Ho:2% Eu, and laser operation at duty cycles in excess of 0.25 appears possible." @default.
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- W2035037898 date "1994-11-01" @default.
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- W2035037898 title "Is a cw 3 μm holmium laser possible? A spectroscopic study" @default.
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- W2035037898 doi "https://doi.org/10.1016/0022-4073(94)90023-x" @default.
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