Multi-millijoule, diode-pumped, picosecond regenerative amplifier at 999-nm wavelength with cryogenically-cooled Yb 3+ :LuLiF 4 crystal

A diode-pumped, cryogenically-cooled Yb 3+ :LuLiF 4 regenerative amplifier has been developed for the first time to our knowledge, which generated ~6-mJ, 13-ps pulses at 999 nm wavelength without a pulse compressor.