title: Intense 2.7 μm and broadband 2.0 μm emission from diode-pumped Er3+/Tm3+/Ho(3+)-doped fluorophosphate glass.
abstract: This Letter reports intense emission at 2.7 μm and broadband emission at 2.0 μm from Er(3+)/Tm(3+)/Ho(3+)-doped fluorophosphate glass. The fluorescence characteristics and energy transfer upon excitation of a conventional 980 nm laser diode are investigated. Based on the fluorescence spectra and lifetime measurement, the effect of Tm(3+) and Ho(3+) ions on intense 2.7 μm emission in fluorophosphate glass is demonstrated. It is also found that the effective bandwidth of 2.0 μm emission due to Tm(3+) and Ho(3+) ions can reach as high as 196 nm. These results indicate that the advantageous spectroscopic characteristics of Er(3+)/Tm(3+)/Ho(3+) triply doped fluorophosphate glass together with the outstanding thermal properties may become an attractive host for the mid-IR solid state lasers.
authors.affiliation: Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences (CAS), Shanghai 201800, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Tian
authors.forename: Rongrong
authors.initials: R
authors.lastname: Xu
authors.forename: Lili
authors.initials: L
authors.lastname: Hu
authors.forename: Junjie
authors.initials: J
authors.lastname: Zhang
mesh_terms: D004871:Erbium / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D006695:Holmium / Q000737:chemistry*; D007834:Lasers; D010710:Phosphates / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013932:Thulium / Q000737:chemistry*
chemical_list: D010710:Phosphates; C012980:fluorophosphate; D004871:Erbium; D013932:Thulium; D005459:Fluorides; D006695:Holmium