期刊
JOURNAL OF MODERN OPTICS
卷 65, 期 13, 页码 1559-1564出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09500340.2018.1455922
关键词
Fibre laser; triple-wavelength; Q-switching; zinc-oxide nanoparticles; passive saturable absorber
类别
We report on the generation of a triple-wavelength passively Q-switched ytterbium-doped fibre laser using a saturable absorber (SA) based on zinc oxide nanoparticles (ZnO NPs) film. The SA was fabricated by embedding ZnO NPs powder into a polyvinyl alcohol as a host polymer. By properly adjusting the pump power and the polarization state, single-, dual- and triple-wavelength Q-switching are stably generated without additional components (such as optical filter, or fibre grating). For the triple wavelength operation, the fibre laser generates a maximum pulse repetition of 87.9kHz with the shortest pulse duration of 2.7s. To the best of authors' knowledge, it's the first demonstration of triple-wavelength passively Q-switching fibre laser using ZnO NPs as a SA. Our results suggest that ZnO is a promising SA for multi-wavelength laser operation.
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