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.