In this work, the thermal lens (TL) technique is used to determine the fluorescence quantum efficiency (eta) of Yb3+-doped phosphate glasses. The role of nonradiative processes such as energy migration among Yb ions and the interaction with OH- radicals are presented and discussed. Two sets of samples with the same Yb concentrations were prepared, one at ambient conditions (set A) and the other in N-2 atmosphere (set N). The TL technique was shown to be very sensitive to the amount of OH radicals. Moreover, the eta values obtained from the TL method are in good agreement with the calculate ones (based on lifetime measurements). The results indicate that TL can be a valuable technique to evaluate the quantum efficiency and nonradiative rates in ion-doped materials. (C) 2005 American Institute of Physics.
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Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R ChinaChinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
Dai, SX
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Yang, JH
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Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R ChinaChinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
Yang, JH
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Wen, L
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Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R ChinaChinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
Wen, L
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Hu, LL
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Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R ChinaChinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
Hu, LL
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Jiang, ZH
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Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R ChinaChinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
机构:
Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R ChinaChinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
Dai, SX
;
Yang, JH
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Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R ChinaChinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
Yang, JH
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Wen, L
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Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R ChinaChinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
Wen, L
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Hu, LL
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Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R ChinaChinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
Hu, LL
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Jiang, ZH
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