Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/22933
Title: Near- and mid-infrared photoluminescence in Ho3+ doped and Ho3+-Yb3+ codoped low-phonon-energy germanotellurite glasses
Authors: Zhou, B
Tao, L
Chan, CYY
Jin, W 
Tsang, YH 
Pun, EYB
Issue Date: 2013
Source: Journal of luminescence, 2013, v. 137, p. 132-137
Abstract: Intense infrared emissions at 1.20 μm (Ho3+: 5I6→5I8 transition) and 2.0 μm (Ho3+: 5I7→5I8 transition) wavelengths from holmium-ytterbium (Ho3+-Yb 3+) codoped low-phonon-energy germanotellurite glasses and fibers were observed. In comparison to Ho3+-singly doped glass, the incorporation of Yb3+ as sensitizer increases the quantum efficiency of the 1.20 μm wavelength emission from 2.4% to 7.9% through efficient energy transfer from Yb3+(2F5/2) to Ho 3+(5I6). Emission of 1.38 μm originating from the Ho3+: (5F4,5S 2)→5I5 transition was also recorded under 488 nm excitation. The observation of both 1.20 and 1.38 μm wavelength emissions is primarily due to the low phonon energy of the germanotellurite glasses and is 770 cm-1 in accordance to the Raman spectrum. Excellent gain performance is predicted by the long lifetime and the large stimulated emission cross-section. The results suggest that low-phonon-energy germanotellurite glass is a promising candidate for optical amplification at relatively unexplored 1.20 and 1.38 μm wavelength regions, and lasing operation at the eye-safe 2.0 μm wavelength region.
Keywords: Energy transfer
Ho3+ 1.20, 1.38 and 2.0 μm emissions
Low-phonon-energy germanotellurite glass
Photoluminescence
Publisher: Elsevier
Journal: Journal of Luminescence 
ISSN: 0022-2313
DOI: 10.1016/j.jlumin.2012.12.045
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

25
Last Week
0
Last month
1
Citations as of Sep 7, 2020

WEB OF SCIENCETM
Citations

23
Last Week
0
Last month
0
Citations as of Feb 12, 2020

Page view(s)

182
Last Week
0
Last month
Citations as of Sep 13, 2020

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.