Chinese Optics Letters, 2018, 16 (6): 061404, Published Online: Jul. 2, 2018
550 MHz carbon nanotube mode-locked femtosecond Cr:YAG laser
140.4050 Mode-locked lasers 140.5680 Rare earth and transition metal solid-state lasers 140.7090 Ultrafast lasers
Abstract
We demonstrate a femtosecond Cr:YAG laser mode-locked by a carbon nanotube saturable absorber mirror (CNT-SAM) at a repetition rate of 550 MHz. By employing the CNT-SAM, which exhibits a modulation depth of 0.51% and a saturation fluence of 28 μJ / cm 2 at 1.5 μm, we achieved a compact bulk Cr:YAG laser with self-starting mode-locked operation near 1.5 μm, delivering an average output power of up to 147 mW and a pulse duration of 110 fs. To our knowledge, this system provides the highest repetition rate among reported CNT-SAM mode-locked Cr:YAG lasers and the shortest pulse duration among saturable absorber mode-locked Cr:YAG lasers with repetition rates above 500 MHz.
Jun Wan Kim, Sun Young Choi, Won Tae Kim, Bong Joo Kang, Won Bae Cho, Guang-Hoon Kim, Fabian Rotermund. 550 MHz carbon nanotube mode-locked femtosecond Cr:YAG laser[J]. Chinese Optics Letters, 2018, 16(6): 061404.