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Influence of Excited-State-Energy Upconversion on Pulse Shape in Quasi-Continuous-Wave Diode-Pumped Er:LiYF _{4} Lasers

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5 Author(s)
Niklaus Ursus Wetter ; Centro de Lasers e Aplic., Inst. de Pesquisas Energeticas e Nucl., Sao Paulo, Brazil ; Alessandro Melo Deana ; Izilda Marcia Ranieri ; LaÉrcio Gomes
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In this paper, we demonstrate the temporal dependency of an Er:LiYF4 laser on the upper laser level energy transfer upconversion. By spectroscopic measurements and numerical simulations, we calculate a value for this upconversion of 9 × 10-17 cm3/s. We also report a 60% higher average output power for short-pulse duration, which is complementary to some earlier findings.

Published in:

IEEE Journal of Quantum Electronics  (Volume:46 ,  Issue: 1 )