Femtosecond-laser-written Tm:KLu(WO4)(2) waveguide lasers

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Depressed-index channel waveguides with a circular and photonic crystal cladding structures are prepared in a bulk monoclinic Tm:KLu(WO4)(2) crystal by 3D direct femto-second laser writing. The channel waveguide structures are characterized and laser operation is achieved using external mirrors. In the continuous-wave mode, the maximum output power of 46 mW is achieved at 1912 nm corresponding to a slope efficiency of 15.2% and a laser threshold of only 21 mW. Passive Q-switching of a waveguide with a circular cladding is realized using single-walled carbon nanotubes. Stable 7 nJ/50 ns pulses are achieved at a repetition rate of 1.48 MHz. This first demonstration of similar to 2 mu m fs-laser-written waveguide lasers based on monoclinic double tungstates is promising for further lasers of this type doped with Tm3+ and Ho3+ ions. (C) 2017 Optical Society of America
Publisher
OPTICAL SOC AMER
Issue Date
2017-03
Language
English
Article Type
Article
Keywords

70-PERCENT SLOPE EFFICIENCY; DOUBLE TUNGSTATE; OUTPUT POWER; KLU(WO4)(2); DEVICES; GROWTH; GLASS; BULK

Citation

OPTICS LETTERS, v.42, no.6, pp.1169 - 1172

ISSN
0146-9592
DOI
10.1364/OL.42.001169
URI
http://hdl.handle.net/10203/223440
Appears in Collection
PH-Journal Papers(저널논문)
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