title: A resonantly-pumped tunable Q-switched Ho:YAG ceramic laser with diffraction-limit beam quality.
abstract: We demonstrated a Q-switched Ho:YAG ceramic laser operating at 2097 nm. The Ho:YAG ceramic laser was resonantly pumped by a Tm:YLF laser at 1908 nm. The laser performance with two Ho-doping concentrations of Ho:YAG ceramics in a U-shaped resonator was studied. Different pump spots were investigated to obtain high extract efficiency. The wavelength of Ho:YAG ceramic laser was tuned from 2090.70 nm to 2098.10 nm. The Q-switched pulse energy were 9.6 mJ at a pulse repetition frequency (PRF) of 200 Hz and 10.2 mJ at a PRF of 100 Hz, respectively. The beam quality M(2) factors were measured to be less than 1.1 in both directions.
authors: Lei
authors: L
authors: Wang
authors: Chunqing
authors: C
authors: Gao
authors: Mingwei
authors: M
authors: Gao
authors: Yan
authors: Y
authors: Li
authors: Fuyong
authors: F
authors: Yue
authors: Jian
authors: J
authors: Zhang
authors: Dingyuan
authors: D
authors: Tang