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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 3, Iss. 2 — Feb. 10, 2005
  • pp: 103–106

Intense frequency upconversion fluorescence of Er(3+)/Yb(3+) co-doped lithium-strontium-lead-bismuth glasses

Hongtao Sun, Shiqing Xu, Baoyu Chen, Shixun Dai, Shilong Zhao, Lili Hu, and Zhonghong Jiang  »View Author Affiliations


Chinese Optics Letters, Vol. 3, Issue 2, pp. 103-106 (2005)


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Abstract

Infrared-to-visible upconversion fluorescence of Er(3+)/Yb(3+) co-doped lithium-strontium-lead-bismuth (LSPB) glasses for developing potential upconversion lasers has been studied under 975-nm excitation. Based on the results of energy transfer efficiency and upconversion spectra, the optimal Yb(3+)-Er(3+) concentration ratio is found to be 5:1. Intense green and red emissions centered at 525, 546, and 657 nm, corresponding to the transitions 2H_(11/2)-->4I_(15/2), 4S_(3/2)-->4I_(15/2), and 4F_(9/2)-->4I_(15/2), respectively, were observed. The quadratic dependence of the 525-, 546-, and 657-nm emissions on excitation power indicates that a two-photon absorption process occurs under 975-nm excitation. The high-populated 4I_(11/2) level is supposed to serve as the intermediate state responsible for the upconversion processes. The intense upconversion luminescence of Er(3+)/Yb(3+) co-doped LSPB glasses may be a potentially useful material for developing upconversion optical devices.

© 2005 Chinese Optics Letters

OCIS Codes
(160.5690) Materials : Rare-earth-doped materials
(300.6170) Spectroscopy : Spectra

Citation
Hongtao Sun, Shiqing Xu, Baoyu Chen, Shixun Dai, Shilong Zhao, Lili Hu, and Zhonghong Jiang, "Intense frequency upconversion fluorescence of Er(3+)/Yb(3+) co-doped lithium-strontium-lead-bismuth glasses," Chin. Opt. Lett. 3, 103-106 (2005)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-3-2-103

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