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. 2022 Mar 28;30(7):11840-11847.
doi: 10.1364/OE.449126.

In-band pumped Tm,Ho:LiYF4 waveguide laser

Pavel Loiko, Esrom Kifle, Gurvan Brasse, Romain Thouroude, Florent Starecki, Abdelmjid Benayad, Alain Braud, Mathieu Laroche, Sylvain Girard, Hervé Gilles, Patrice Camy
Free article

In-band pumped Tm,Ho:LiYF4 waveguide laser

Pavel Loiko et al. Opt Express. .
Free article

Abstract

A 4.5 at.% Tm, 0.5 at.% Ho:LiYF4 planar waveguide (thickness: 25 μm) grown by Liquid Phase Epitaxy is in-band pumped by a Raman fiber laser at 1679 nm (the 3H6 → 3F4 Tm3+ transition). A continuous-wave waveguide laser generates a maximum output power of 540 mW at 2051nm with a slope efficiency of 32.6%, a laser threshold of 337 mW and a linear laser polarization (π). This represents the highest output power extracted from any Tm,Ho waveguide laser. No parasitic Tm3+ colasing is observed. The waveguide propagation losses are determined to be as low as 0.19 dB/cm.

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