We have demonstrated a diode-pumped Yb:LiYF<sub>4</sub> (Yb:YLF) laser oscillator for the first time to our knowledge. A wide tuning range of 25 nm and a high slope efficiency of 50% were obtained at a high laser-diode pump intensity of 100 kW/cm<sup>2</sup>. Emission and absorption spectra of the Yb:YLF crystal at 8 K represent a wide laser gain width of 38 nm, indicating efficient laser operation similar to that of a four-level laser system with a reduced saturation fluence of 11 J/cm<sup>2</sup>.
© 2001 Optical Society of America
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3380) Lasers and laser optics : Laser materials
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3600) Lasers and laser optics : Lasers, tunable
(140.5680) Lasers and laser optics : Rare earth and transition metal solid-state lasers
Junji Kawanaka, Hajime Nishioka, Norihiro Inoue, and Ken-ichi Ueda, "Tunable Continuous-Wave Yb:YLF Laser Operation with a Diode-Pumped Chirped-Pulse Amplification System," Appl. Opt. 40, 3542-3546 (2001)