Cascade laser optimization for 3 H 4 → 3 H 5 and 3 F 4 → 3 H 6 sequent transitions in Tm 3+ -doped materials - Institut d'Optique Graduate School Access content directly
Journal Articles Optics Express Year : 2023

Cascade laser optimization for 3 H 4 → 3 H 5 and 3 F 4 → 3 H 6 sequent transitions in Tm 3+ -doped materials

Abstract

We study a cascade laser scheme involving the 3 H 4 → 3 H 5 and 3 F 4 → 3 H 6 consecutive transitions in Tm 3+ -doped materials as a promising technique to favor laser emission at 2.3 µm. We examine the conditions in terms of the Tm 3+ doping levels for which the cascade laser is beneficial or not. For this, Tm:LiYF 4 lasers based on crystals with several doping levels in the range of 2.5 - 6 at.% with and without cascade laser are studied. For low doping of 2.5 at.% Tm 3+ , adding the laser emission at 1.9 µm allows to double the output power at 2.3 µm, whereas for high doping of 6 at.%, allowing the laser to operate at 1.9 µm totally suppresses the laser emission at 2.3 µm. An analytical model is developed and confronted with experimental results to predict this doping-dependent phenomenon and forecast the potential benefits. This study of cascade laser emission on the 3 H 4 → 3 H 5 and 3 F 4 → 3 H 6 transitions versus the Tm 3+ doping level is finally extended to other well-known Tm 3+ -doped laser materials.
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Dates and versions

hal-04247277 , version 1 (18-10-2023)

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Hippolyte Dupont, Lauren Guillemot, Pavel Loiko, Rosa Maria Solé, Xavier Mateos, et al.. Cascade laser optimization for 3 H 4 → 3 H 5 and 3 F 4 → 3 H 6 sequent transitions in Tm 3+ -doped materials. Optics Express, 2023, 31 (21), pp.34201. ⟨10.1364/OE.501585⟩. ⟨hal-04247277⟩
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