title: Activation effect of Ho3+ at 2.84 μm MIR luminescence by Yb3+ ions in GGG crystal.
abstract: The use of Yb(3+) co-doping for the enhancement of Ho(3+):(5)I(6)→(5)I(7) mid-IR (MIR) emissions was investigated in GGG crystal for the first time. It is established that Yb(3+) highly increases Ho(3+) 2.84 μm emissions by transforming pump energy from the Yb(3+):(2)F(5/2) level to the laser upper level (5)I(6) of Ho(3+). The energy-transfer efficiency from Yb(3+):(2)F(5/2) to Ho(3+):(5)I(6) is calculated to be 96.2%. The absorption cross section, emission cross section, and fluorescence quantum efficiency are estimated and discussed. It is concluded that the Yb, Ho:GGG crystal is promising material for an LD-pumped 2.84 μm laser application.
authors: Yan
authors: Y
authors: Wang
authors: Jianfu
authors: J
authors: Li
authors: Zhaojie
authors: Z
authors: Zhu
authors: Zhenyu
authors: Z
authors: You
authors: Jinlong
authors: J
authors: Xu
authors: Chaoyang
authors: C
authors: Tu
mesh_terms: D005682:Gadolinium / Q000737:chemistry*; D005708:Gallium / Q000737:chemistry*; D006695:Holmium / Q000737:chemistry*; D007259:Infrared Rays; D013050:Spectrometry, Fluorescence; D015018:Ytterbium / Q000737:chemistry*
chemical_list: D005682:Gadolinium; D005708:Gallium; D015018:Ytterbium; D006695:Holmium