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550 MHz Carbon Nanotube Mode-Locked Femtosecond Cr:YAG Laser
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- Authors
- Jun Wan Kim, Sun Young Choi, Won Tae Kim, Bong Joo Kang, Won Bae Cho, Guang-Hoon Kim, Fabian Rotermund
- Issue Date
- 2018-06
- Citation
- Chinese Optics Letters, v.16, no.6, pp.1-4
- ISSN
- 1671-7694
- Publisher
- Optical Society of America (OSA)
- Language
- English
- Type
- Journal Article
- 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 selfstarting 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.
- KSP Keywords
- Carbon nano-tube(CNT), Mode-locked, Output power, Pulse duration, Repetition rate, Saturable Absorber, Saturation fluence, YAG laser, laser modes, modulation depth