title: Diode-pumped 2-μm pulse laser with noncomposite Tm,Ho:YLF rod conduction-cooled down to -80°C.
abstract: Q-switched operation of a diode-side-pumped, conduction-cooled Tm,Ho:YLF laser oscillator with 100-mJ output at a pulse repetition rate of 20 Hz and an eye-safe wavelength of 2-μm was achieved. The noncomposite Tm,Ho:YLF laser rod was conduction-cooled down to -80°C through thermal contact of In films from Cu heat sinks, and the laser diode arrays were conduction-cooled to approximately 20°C using Cu heat sinks in a vacuum container. A ring resonator of 3.86 m length with an acousto-optic Q-switch was used. The pulse width was 125 ns, and optical-to-optical efficiency was approximately 7% for an output of 100 mJ. The laser is used at 2.05 μm for applications of Doppler wind lidar measurements, CO2differential absorption lidar measurements, and aerosol profiling.
authors.forename: Kohei
authors.initials: K
authors.lastname: Mizutani
authors.forename: Toshikazu
authors.initials: T
authors.lastname: Itabe
authors.forename: Shoken
authors.initials: S
authors.lastname: Ishii
authors.forename: Makoto
authors.initials: M
authors.lastname: Aoki
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Asai
authors.forename: Atsushi
authors.initials: A
authors.lastname: Sato
authors.forename: Hirotake
authors.initials: H
authors.lastname: Fukuoka
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Ishikawa
authors.forename: Kazufusa
authors.initials: K
authors.lastname: Noda