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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 8 — Mar. 10, 2012
  • pp: 1115–1121

Temperature-dependent photoluminescence spectra of Er-Tm codoped calcium boroaluminate glasses

Fei Xu, Lingling Zheng, Mingzhu Li, Fang Lu, Zhongquan Ma, Zuimin Jiang, Pinghua Zhou, Jianwei Shi, and Yu Pu  »View Author Affiliations


Applied Optics, Vol. 51, Issue 8, pp. 1115-1121 (2012)
http://dx.doi.org/10.1364/AO.51.001115


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Abstract

The temperature dependence of photoluminescence (PL) spectra of Er-Tm codoped calcium boroaluminate (CABAL) glasses with different dopant concentrations was investigated under 15–298 K, by pumping at 795 nm. The intensities of three band emissions located at 1.46, 1.53, and 1.80 μm decreased monotonically when increasing the temperature from at lower concentrations. However, the emissions peaked at 1.80 μm increase with the increasing temperature at higher concentrations. This was attributed to the increasing of cross relaxation (CR) resulting from the high doping concentration of Tm ions. This was evidenced by the much shorter fluorescence lifetime of 56 μs for the F34 emission due to F34H36 transition for the CABAL glass codoped with 2.00 mol.% Tm2O3, in comparison with 185 μs for that of 0.2 mol.% Tm2O3. The energy transfer (ET) and CR processes between Er3+ and Tm3+ ions have been discussed at different doping concentrations and operating temperatures. The nonexponential character of the decays of I413/2 and H34 with the increasing concentration indicated the occurring of a dipole-dipole quenching processes in the framework of a diffusion-limited regime. The average critical distances of CR between Tm3+ ions and ET between Er3+ and Tm3+ ions were approximately 1 nm.

© 2012 Optical Society of America

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(160.5690) Materials : Rare-earth-doped materials

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: September 15, 2011
Manuscript Accepted: October 23, 2011
Published: March 7, 2012

Citation
Fei Xu, Lingling Zheng, Mingzhu Li, Fang Lu, Zhongquan Ma, Zuimin Jiang, Pinghua Zhou, Jianwei Shi, and Yu Pu, "Temperature-dependent photoluminescence spectra of Er-Tm codoped calcium boroaluminate glasses," Appl. Opt. 51, 1115-1121 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-8-1115

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