2-GHz carbon nanotube mode-locked Yb:YAG channel waveguide laser

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We demonstrate GHz-repetition rate mode-locked operation of a femtosecondlaser-inscribed Yb:YAG channel waveguide laser using single-walled carbon nanotube saturable absorber mirror (SWCNT-SAM). A 6.3-mm-long, type II Yb: YAG waveguide laser with an extended cavity configuration delivers mode-locked picosecond (ps) pulses at GHz repetition rates. The dispersion of the laser cavity is compensated by the combination of a multi-functional output coupler and the Gires-Tournois interferometer (GTI) effect arising from an air-gap between the facet of the waveguide and the output coupler. The incident beam fluence on the SWNCNT-SAM is controlled by adjusting two intracavity lenses to avoid optical damage on the polymer nanocomposite matrix containing the SWCNTs. The average output power of our mode-locked waveguide laser is 322 mW at a pump power of 3.2 W. Nearly Fourier-limited, stable 2-ps-short pulses are generated at a repetition rate of 2.08 GHz. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
Publisher
OPTICAL SOC AMER
Issue Date
2018-03
Language
English
Article Type
Article
Citation

OPTICS EXPRESS, v.26, no.5, pp.5140 - 5145

ISSN
1094-4087
DOI
10.1364/OE.26.005140
URI
http://hdl.handle.net/10203/242287
Appears in Collection
PH-Journal Papers(저널논문)
Files in This Item
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