In-band pumped Tm,Ho:LiYF4 waveguide laser

A 4.5 at.% Tm, 0.5 at.% Ho:LiYF4 planar waveguide (thickness: 25 mu m) grown by Liquid Phase Epitaxy is in-band pumped by a Raman fiber laser at 1679 nm (the H-3(6) -> F-3(4) 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 (pi). 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. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

Automated summary

In this study, a 4.5 at.% Tm, 0.5 at.% Ho:LiYF4 planar waveguide grown by Liquid Phase Epitaxy was in-band pumped by a Raman fiber laser. The maximum output power of the waveguide laser reached 540 mW at 2051nm, with a slope efficiency of 32.6%, a laser threshold of 337 mW, and a linear laser polarization. These results represent the highest output power achieved from any Tm, Ho waveguide laser. The waveguide propagation losses were determined to be as low as 0.19 dB/cm.