The experimental evidence of the amplified spontaneous emission of Yb3+ ions in LiYbF4 crystal
2017
Abstract The experimental evidence of the amplified spontaneous emission of Yb 3+ ions in LiYbF 4 crystal, which partially stipulates up-conversion processes in Yb-sensitized phosphors, doped by rare-earth ions are presented for the first time. To do that the spatial distributions and the spectra of Yb 3+ ions luminescence along the excitation radiation propagation through the sample were studied simultaneously. The laser diode radiation (1 W, λ=932 nm) was used for the luminescence excitation and its surface power density was varied by shifting of the position of the laser beam waist within the sample (similar to Z-scanning).
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