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- W4320811896 abstract "Laser emission in various regimes was obtained at room temperature in the three-micron range on Er 3+ transition 4 I 11/2 → 4 i 13/2 , despite a much larger lifetime of the terminal level. Various mechanisms have been considered in order to obtain efficient depopulation of 4 I 13/2 necessary to avoid the self-saturation of the laser emission: excited state absorption of the pump radiation from the terminal level, 1 energy transfer to impurities, 2 up-conver-sion, 3 and, most recently, cascading with 1.5µm emission from 4 I 13/2 to the ground level 4 I 15/2 , 4 While the up-conversion is an internal mechanism of the system of Er 3+ ions and a high Er concentration is necessary in order to be effective, all the other mechanisms require additional external conditions and could act at any Er concentration." @default.
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- W4320811896 date "1994-01-01" @default.
- W4320811896 modified "2023-10-16" @default.
- W4320811896 title "The effect of 1.5 mm cascading on 3 mm er3+ laser emission" @default.
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- W4320811896 doi "https://doi.org/10.1364/cleo_europe.1994.ctuk75" @default.
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