Dynamic wavelength switching and continuous tunability in a composite Tm/Ho:YLF laser

We present a wavelength-conversion laser system using Tm/Ho:YLF composite crystals, based on a switchable output coupling system and F-P etalons for the first time, to our knowledge. The system enables flexible switching between Tm and Ho lasers and independently achieves tunable for both lasers. At 20.74 W pump power, the Tm laser at 1903.68 nm and the Ho laser at 2064.60 nm were achieved with maximum powers of 2.99 and 2.61 W. At 14.19 W pump power, continuous tuning of Tm (1875.60-1885.31 nm, 1902.75-1904.75 nm) and Ho (2050.75-2064.60 nm) lasers was achieved by adjusting the F-P etalons. This wavelength-conversion system can flexibly meet diverse requirements for laser types and wavelengths in different application scenarios, demonstrating broad application prospects.