Cryogenic Yb:YLF lasers mode-locked with saturable Bragg reflectors (original) (raw)

2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2021

Abstract

Yb:YLF is a broadly tunable (996-1076 nm) continuous-wave (cw) laser that allows generation of sub-100-fs long pulses upon mode-locking at room temperature [1] - [4] . Unfortunately, the power handling limitations of the thermo-mechanically weak YLF host at room temperature limited the average mode-locked output power to the 100 mW level in earlier studies. The advantages of cryogenic operation with respect to power scaling is well-known and ample explored in cw, q-switched and amplifier geometries in Yb:YLF systems and output power above 300 W has been achieved [5] - [8] . Interestingly, unlike other media like Yb:YAG, Yb:YLF possess a relatively broad gain bandwidth even at cryogenic temperatures (FWHM: ~10 nm in E//a axis). Despite that, to our knowledge, till this study [9] , mode-locking of Yb:YLF was not explored at cryogenic temperatures.

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