Journal
OPTICS EXPRESS
Volume 28, Issue 4, Pages 5639-5647Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.385927
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Funding
- National Natural Science Foundation of China [61775119]
- Natural Science Foundation of Shandong Province [ZR2018MF033]
- National Basic Research Program of China (973 Program) [2018YFB1107403-2]
- Foundation of President of China Academy of Engineering Physics [YZJJLX2018005]
- Taishan Young Scholar Program of Shandong Province
- Qilu Young Scholar Program of Shandong University [tsqn201812010]
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We investigate the saturable absorption properties of Bi2Se3 in a bulk laser operating at 2 mu m wavelength region. The Bi2Se3 saturable absorber (SA) is prepared with the liquid-phase exfoliation method, which gives a saturable input flux of 4.3 mJ/cm(2), a modulation depth of similar to 10%, and a non-saturable absorption of 10.2%. With the Bi2Se3 saturable absorber, a passive Q-witching Tm:YAG ceramic laser is realized with a shortest pulse duration of 355 ns, a single pulse energy of 6.76 mu J and peak power of 19 W. We believe that this is the first report on Bi2Se3 Q-switched 2 mu m bulk laser. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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