Upconversion luminescence of Er3+ in alkali bismuth gallate glasses

Abstract

Frequency upconversion of Er3+ in alkali bismuth gallate glasses have been investigated. The upconversion mechanisms are discussed, and the dominant mechanisms are excited state absorption for the H11/22→I15/24 and S3/24→I15/24 transitions, and energy transfer upconversion for the F9/24→I15/24 transition. Intense green (around 525–550 nm) and red (around 660 nm) emission bands were observed under 800 nm excitation. At a pump intensity of 15.6 W/cm2, frequency upconversion efficiencies of 2.1×10−2 and 4.8×10−3 were obtained for the green and red emissions, respectively. The results are the highest among doped oxide glasses, and are comparable to those reported for Er3+/Yb3+ codoped fluoride glasses.

Effect of Fuel on Structural and Optical Characterization of Gd2O3:Er3+ Phosphor

“…Subsequently, by absorption of another photon through an excited state absorption process or by accepting energy from another Er 3+ ion nearby via energy transfer up conversion, the second step population from the 4 I11/2 to the 4 F7/2 level takes place. The upper level 4 F7/2 can populate the luminescent levels 4 F9/2, 2 H11/2, 4 S3/2 which is responsible for red and green light emission by multiphonon relaxation ( Guo et al 2004, Man et al 2000.…”

“…The weak emission in the vicinity of 665nm is ascribed to the magnetic dipole transition. The mechanisms of the visible emissions of Er 3+ ions under 960nm excitation involve two well known up conversion mechanisms: (i) excited state absorption (ESA), (ii) energy transfer (ET) [Man et al 2000, Yang et al 2003. The ground state 4 I15/2 of Er 3+ ion absorbs 960 nm photon and populate the 4 I11/2 level by a ground state excitation process successively populate the 4 I13/2 state by multiphonon relaxation process.…”

Structural investigation of gallate glass using L3-edge extended X-ray absorption spectroscopy and computer simulation

“…In particularly, gallate glasses have relatively low vibrational frequencies by comparison with their halide counterparts [4,7].Consequently, these gallate glasses are of interest as the host glassy matrix for rare-earth atoms such as Pr, Nd, Ho, etc. [3,5,8].…”

“…These days there has been great interest in rare-earth gallate glasses primarily for their optical properties and applications as laser host materials, phosphors and other optical applications [1][2][3][4][5][6]. In particularly, gallate glasses have relatively low vibrational frequencies by comparison with their halide counterparts [4,7].Consequently, these gallate glasses are of interest as the host glassy matrix for rare-earth atoms such as Pr, Nd, Ho, etc.…”

Optical Transitions of Erbium-doped Sodium Lanthanum Gallate Glasses

“…Effective 1.3µm emission from Pr 3+ and 1.5µm emission from Er 3+ have been demonstrated in these glasses. [5,6] In this paper we investigate the properties of Erbiumdoped NLG glasses with a molar composition of 12%Na 2 -doped NLG glasses is prepared by doping Er 2 O 3 1wt% into the glasses raw chemicals. The glasses powders are melted at 1600~1650℃ in a platinum crucible using an electrically heated furnace.…”