Diode-Pumped Mode-Locked Yb:KY(WO4)2 Laser Generating 46 fs Pulses

Identifier:  imarina:9551863

Handle: https://hdl.handle.net/20.500.11797/imarina9551863

Authors:  Li, Xiu-Ping; Lin, Zhang-Lang; Zeng, Huang-Jun; Ma, Bo; Zhang, Ge; Loiko, Pavel; Mateos, Xavier; Petrov, Valentin; Chen, Weidong

Abstract:
We report on sub-50 fs pulse generation from a diode-pumped mode-locked laser based on an ytterbium-doped monoclinic potassium yttrium double tungstate crystal operating in the 1 mu m spectral region. Pumping by a low-power, spatially single-mode, fiber-coupled laser diode at 976 nm, a maximum continuous-wave output power of 433 mW at 1066.1 nm was obtained. Using a quartz-based intracavity Lyot filter, an exceptionally broad continuous-wavelength tuning range of 98 nm was achieved. In the mode-locked regime, the diode-pumped Yb:KY(WO4)2 laser delivered soliton pulses as short as 46 fs at a central wavelength of 1069.2 nm by employing a SEmiconductor Saturable Absorber Mirror. To the best of our knowledge, these results represent the broadest continuous-wave tuning range and the shortest pulse duration ever reported for lasers based on ytterbium-doped monoclinic double tungstate crystals.