Carbon nanotube Q-switched Yb:KLuW surface channel waveguide lasers

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A channel waveguide (WC) buried immediately below the surface of a Yb:KLuW crystal is used as a laser gain medium for passive Q-switching by both evanescent- and direct-field interactions with single-walled carbon nanotubes (SWCNTs) near 1040 nm. The SWCNTs used as saturable absorbers (SAs) are deposited on top of the half-ring-type channel WG fabricated via femtosecond direct laser writing. The Q-switched WC laser delivers 88.5 ns pulses at a 1.16 MHz repetition rate with a maximum average output power of 680 mW. For the two different interaction schemes with SWCNT-SAs, the pulse characteristics, depending on the output coupling ratio and absorbed pump power, are experimentally investigated and compared to the results of theoretical analyses of the SA Q-switched operation.
Publisher
OPTICAL SOC AMER
Issue Date
2020-01
Language
English
Article Type
Article
Citation

OPTICS LETTERS, v.45, no.1, pp.216 - 219

ISSN
0146-9592
DOI
10.1364/OL.45.000216
URI
http://hdl.handle.net/10203/272602
Appears in Collection
PH-Journal Papers(저널논문)
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