Stable wavelength, narrow linewidth diode-pumped Tm: YLF laser with double etalons

Stable wavelength, narrow linewidth continuouswave (CW) Tm: YLF laser with double Fabry-Perot etalons by using the dual-end-pumping configuration is presented. We achieved the maximum output power of 14.0 W when the incident pump power of 56.3 W, corresponding to the optical-tooptical conversion efficiency of 24.9% and slope efficiency of 32.2%. The Tm: YLF laser operats at 1907.7 nm with FWHM of approximately 0.15 nm. The shift of the laser wavelength was only 0.2 nm with the incident pump power from 20.6 W to 56.3 W.