Spectroscopic properties analyses and laser characterization simulation of Er3+,Eu3+:YAP single crystal.
Authors of this article are:
Zhang B, Wang Y, Zhang W, Li J, Zhu Z, You Z, Tu C.
A summary of the article is shown below:
Er,Eu:YAlO3 (abbr. as Er,Eu:YAP) crystal was grown by the Czochralski technique for the first time. Its absorption and fluorescence spectra as well as the fluorescence decay curves were measured and investigated. The spectral parameters including absorption cross-section and emission cross-section were calculated. It is found that the crystal has short lifetimes at 4I13/2 and 4I11/2 levels, large absorption cross-section at 974 nm and 790 nm, and large stimulated emission cross-section at 2704 nm. The co-dopant Eu3+ decreases the fluorescence lifetime of 4I11/2 level from 400 μs to 59.35 μs, and thus inhibits the self-termination effect of ~2.7 μm in some degree. We develop a theoretical model that simulates the laser characteristics of Er,Eu:YAP crystal numerically. Based on Er3+-Eu3+ energy level diagrams, the rate equation model was built and discussed. It was found that: when the pump rate increases gradually, the laser quantum efficiency reaches to its upper limit with a fixed value 2-p2, and this value is 1.35 for Er,Eu:YAP crystal. The results show that Er,Eu:YAP crystal is an excellent material candidate for ~2.7 μm laser.
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This article is a good source of information and a good way to become familiar with topics such as:
Energy transfer;Er(3+) ions;Er,Eu:YAP crystal;Laser characterization simulation;Spectroscopic properties
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