title: Spectroscopic analysis and efficient diode-pumped 2.0μm emission in Ho(3+)/Tm(3+) codoped fluoride glass.
abstract: Intense 2.0μm emission has been obtained in Ho(3+)/Tm(3+) codoped ZBLAY glass pumped by common laser diode. Three intensity parameters and radiative properties have been determined from the absorption spectrum based on the Judd-Ofelt theory. The 2μm emission characteristics and the energy transfer mechanism upon excitation of a conventional 800nm laser diode are investigated. Efficient Tm(3+) to Ho(3+) energy transfer processes have been observed in present glass and investigated using steady-state and time-resolved optical spectroscopy measurement. The energy transfer microscopic parameter has been calculated with the Inokuti-Hirayama and Förster-Dexter models. High quantum efficiency of 2μm emission (80.35%) and large energy transfer coefficient from Tm(3+) to Ho(3+) indicates this Ho(3+)/Tm(3+) codoped ZBLAY glass is a promising material for 2.0μm laser.
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, PR China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Tian
authors.forename: Xufeng
authors.initials: X
authors.lastname: Jing
authors.forename: Shiqing
authors.initials: S
authors.lastname: Xu
mesh_terms: D000042:Absorption; D004581:Electronics; D004735:Energy Transfer; D005459:Fluorides / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D006695:Holmium / Q000737:chemistry*; D007700:Kinetics; D007834:Lasers; D013055:Spectrophotometry, Infrared; D013932:Thulium / Q000737:chemistry*; D013997:Time Factors
chemical_list: D013932:Thulium; D005459:Fluorides; D006695:Holmium
keywords: 2.0μm emission; Energy transfer microscopic parameter; ZBLAY glass