M. Schellhorn, "A comparison of resonantly pumped Ho:YLF and Ho:LLF lasers in CW and Q-switched operation,"
in Advances in Optical Materials,
OSA Technical Digest (CD)
(Optical Society of America, 2011), paper AWA08.
Ho:YLF and Ho:LLF are studied under identical pump conditions. Ho:LLF shows lower threshold and in CW operation higher slope efficiencies. 37 and 38.5 mJ were achieved at 100 Hz with Ho:LLF and Ho:YLF, respectively.