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Influence of interionic energy transfer mechanisms in Tm,Ho:YAG on the maximum extractable energy in regenerative amplifiers
Author(s): Ramon Springer; Tyndale Hannan; Christoph Pflaum
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Paper Abstract

The numerical simulation of a regenerative amplifier based on codoped Tm,Ho:YAG is presented. Within this work, a maximum pulse energy of 3.1 mJ is observed for 0.9 kW CW end-pumping at 785 nm. The simulation results demonstrate that interionic mechanisms such as upconversion and energy transfer significantly influence the population of states and consequently, the amplification. In detail, the most dominant mechanisms are identified by introducing the rate term kxNiNm as a quantity to compare the strength of all occuring interionic mechanisms. It can then be shown that the energy transfer mechanism E6512 between Holmium and Thulium ions is the greatest source of population loss for the upper lasing state 5 I7 in Holmium. In summary, the presented model represents an efficient tool to characterize the influence of interionic mechanisms on the extractable energy in solid-state media under pulsed operation.

Paper Details

Date Published: 17 May 2018
PDF: 8 pages
Proc. SPIE 10683, Fiber Lasers and Glass Photonics: Materials through Applications, 106832K (17 May 2018); doi: 10.1117/12.2306235
Show Author Affiliations
Ramon Springer, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Tyndale Hannan, Massachusetts Institute of Technology (MIT) (United States)
Christoph Pflaum, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)


Published in SPIE Proceedings Vol. 10683:
Fiber Lasers and Glass Photonics: Materials through Applications
Stefano Taccheo; Jacob I. Mackenzie; Maurizio Ferrari, Editor(s)

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