In this paper, we report a high power cryogenic cooling Tm(6 at.-%),Ho(0.5 at.-%):YLF laser end-pumped by a 19-fiber-coupled-diodes module with the central wavelength of 792 nm at 20 deg.. The highest continuous-wave power of 3.6 W at 2.051 ?m is attained under pumping power of 13.6 W, corresponding to optical-optical conversion efficiency of 26%, and the slope efficiency is larger than 30%. The threshold power is only about 0.16 W because of the long lifetime, large effective emission cross section, and low re-absorption in Tm,Ho:YLF crystal.
© 2005 Chinese Optics Letters
Baoquan Yao, Youlun Ju, Yuezhu Wang, Wanjun He, and Yufeng Li, "3.6-W cryogenic Tm,Ho:YLF laser pumped by fiber-coupled diodes module," Chin. Opt. Lett. 3, 210-211 (2005)