title: Fully conductively cooled, diode-pumped Ho:Tm:LuLiF4 laser oscillator/amplifier.
abstract: A fully conductively cooled and diode-pumped linear Ho:Tm:LuLiF laser oscillator can generate more than 1 J normal mode pulses at a 10 Hz pulse repetition rate where heat pipes are used for cooling pump diodes and laser crystal. As an amplifier, it can amplify the 80 mJ/180 ns pulses into 400 mJ pulses before the appearance of amplified spontaneous emission (ASE). The ASE threshold is about 5.6 J with a 40 mm long and side-polished laser crystal. For a 5 mJ input pulse and 5.6 J pump pulse, the double-pass gain exceeds 22.5. If the lateral surface of the laser crystal is fine ground, the ASE threshold can rise to higher than 8 J, but the efficiency will be lower due to large pump diffusion.
authors: Science Systems and Applications, Inc., One Enterprise Parkway, Hampton, Virginia, USA. yingxin.bai‑1@nasa.gov
authors: Yingxin
authors: Y
authors: Bai
authors: Jirong
authors: J
authors: Yu
authors: Mulugeta
authors: M
authors: Petros
authors: Bo
authors: B
authors: Trieu
authors: Paul
authors: P
authors: Petzar
authors: Upendra N
authors: UN
authors: Singh
mesh_terms: D053844:Lasers, Solid-State; D008962:Models, Theoretical; D013696:Temperature