Measurement of infrared level lifetime by upconversion luminescence

Based on repetition frequency-dependent excited state absorption (ESA) upconversion (UC) luminescence, a method to measure the lifetime of an IR intermediate level is proposed so long as ESA UC luminescence can occur in the rare earth ions. The feasibility of this idea is demonstrated via a theoreti...

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Bibliographic Details
Published in:Optics letters 2011-04, Vol.36 (7), p.1056-1058
Main Authors: LI, Ai-Hua, ZHENG, Zhi-Ren, QIANG LÜ, XU, Zhao-Peng, CHAO XU, XU, Yu-Heng, LIU, Wei-Long
Format: Article
Language:English
Subjects:
Absorption
Exact sciences and technology
Frequency conversion
harmonic generation, including high-order harmonic generation
Fundamental areas of phenomenology (including applications)
Infrared Rays
Lasers, Solid-State
Luminescent Measurements - methods
Nonlinear optics
Optics
Physics
Time Factors
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Summary:Based on repetition frequency-dependent excited state absorption (ESA) upconversion (UC) luminescence, a method to measure the lifetime of an IR intermediate level is proposed so long as ESA UC luminescence can occur in the rare earth ions. The feasibility of this idea is demonstrated via a theoretical simulation. A Er(3+):LiNbO₃ crystal ESA UC luminescence under femtosecond laser excitation is used to illustrate this measurement method, and the obtained 1.5 μm lifetime of 2.31 ms is shorter than previous reported values. This method can obviate the influence of radiation trapping effect on lifetime measurement, which is crucial in the traditional pulse sampling technique.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.36.001056