| 光谱学与光谱分析 |
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| The Analysis of Sinusoidal Modulated Method Used for Measuring Fluorescence Lifetime |
| FENG Ying,HUANG Shi-hua* |
| Institute of Optoelectronics and Technology, Beijing Jiaotong University, Key Laboratory of Luminescence and Optical Information Ministry of Education, Beijing 100044, China |
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Abstract This paper has built a system with a sinusoidal modulated LED as the excitation source. Such exciter was used upon the sample Eu2L′3·nH2O(L′=C4H4O4). Both the excitation light and the 5D0—7F2 emission of Eu3+ ion were measured. Fluorescence lifetime, which approximate to 0.680 ms, can then be obtained from the measured excitation and fluorescence waveforms by non-linear least square curve fitting based on the principle of phase-shift measurement of fluorescence lifetime. Data processing methods considering respectively the high order harmonics in the modulation and multi-exponential decay of the fluorescence were discussed. A method of utilizing Fourier series expandedness to amendatory the result was put forward. Accordingly, the applicability for phase-shift method was expanded as well as a more exact result was acquired.
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Received: 2006-07-05
Accepted: 2006-10-16
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Corresponding Authors:
HUANG Shi-hua
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| Cite this article: |
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FENG Ying,HUANG Shi-hua. The Analysis of Sinusoidal Modulated Method Used for Measuring Fluorescence Lifetime[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(12): 2523-2526.
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| URL: |
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https://www.gpxygpfx.com/EN/Y2007/V27/I12/2523 |
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