Acta Photonica Sinica ›› 2010, Vol. 39 ›› Issue (7): 1163-1168.doi: 10.3788/gzxb20103907.1163

• Optical Materials • Previous Articles     Next Articles

Investigation on Upconversion Spectroscopic Properties of Er3+-doped Novel GeS2-In2S3-CsIGlass

DENG Sheng-wei1, XU Tie-feng1, DAI Shi-xun1,2, NIE Qiu-hua1, Wang Xun-si1,SHEN Xiang1, ZHANG Xiang-hua1,3   

  1. (1 College of Information Science and Engineering, Ningbo University, Ningbo, Zhejiang |315211,China)
    (2 State Key Laboratory of Transient Optics and Photonics, Xi′an Institute of Optics and Precision Mechanics, Chinese Academy of Science,Xi′an 710119,China)
    (3 Laboratoire de Verres et Ceramiques, Universite de Rennes 1, Rennes 35042,France)
  • Received:2009-11-18 Revised:2010-01-11 Online:2010-07-25 Published:2010-07-25
  • About author:was born in 1978. Now, he is pursuing his M.S. degree at College of Information Science and Engineering, Ningbo University,and his research interests focus on optical fiber communications.

Abstract:

Er3+-doped 80GeS2-10In2S3-10CsI(mol%)chalcohalide glass was fabricated by melt-quenching technique. The thermal stability, Raman spectra, absorption spectra, upconversion emission spectra of glass samples were measured, and upconversion mechanisms of Er3+ in the glass were analyzed. The intensity parameters(Ωt,t=2,4,6), spontaneous transition probabilities(Α), fluorescence branching ratios(β), and radiative lifetimes(τrad) were calculated by using the Judd-Ofelt theory. Under 980 nm diode laser excitation, intense emission bands centered at 526 nm and 549 nm corresponding to the transitions of 2H11/2→4I15/2 and 4S3/2→4I15/2 , respectively, were observed for the first time in this glass, and intensity of 549 nm green light is more stronger. For 549 nm emission band, the upconversion fluorescence lifetime is 0.34 ms, and the quantum efficiency is 69%. The dependence of visible emission intensities upon excitation intensity was examined. A plot of logIUP vs  logIIR yields two fitted lines with slope 1.71 and 2.03, respectively, which indicates a two-photon process for green emission. Results suggest that Er3+-doped 80GeS2-10In2S3-10CsI chalcohalide glass may be a potential host material for upconversion green lasers.

Key words: Chalcohalide glass, Fluorescence, Up-conversion, Erbium ions

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