Abstract
Ytterbium (Yb3+) doped rare-earth oxyorthosilicates with a general chemical formula of Yb3+:RE2SiO5 (where RE = Gd [1], Y [2], Lu [3] or Sc [4]), crystallize in the monoclinic system (sp. gr. C2/c,). One of the well-known representatives of this crystal family is the scandium oxyorthosilicate Yb:Sc2SiO5. It exhibits a relatively high thermal conductivity of 7.5 Wm-1K-1 (for 1 at.% Yb3+ doping) at room temperature and a negative thermo-optic coefficient of -6.3 × 10-6 K-1 [5], which ensures good heat removal and a relatively weak thermal lensing effect. The broad gain profiles and the moderate luminescence lifetime (0.7 ms) of Yb:Sc2SiO5 make it very suitable for the development of femtosecond mode-locked (ML) oscillators and amplifiers [6]. Power scalable operation of such oscillators is also possible in the thin-disk architecture. In this work, we demonstrate sub-40 fs soliton pulse generation from a diode-pumped SESAM ML Yb:Sc2SiO5 laser near 1070 nm.
© 2023 IEEE
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