Journal
INFRARED PHYSICS & TECHNOLOGY
Volume 109, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.infrared.2020.103381
Keywords
Tm:Ca(Gd,Lu)AlO4 crystal; WS2 saturable absorber; Doubly Q-switch technology
Categories
Funding
- National Natural Science Foundation of China [61775119]
- National Key Research and Development Program of China [2016YFB1102201]
- Natural Science Foundation of Shandong Province, China [ZR2018MF033]
- Foundation of President of China Academy of Engineering Physics [YZJJLX2018005]
- Taishan Young Scholar Program of Shandong Province [tsqn201812010]
- Qilu Young Scholar Program of Shandong University
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A two-dimensional WS2 grown by chemical vapor deposition (CVD) is employed as saturable absorber. Using a novel crystal of Tm:Ca(Gd,Lu)AlO4, doubly Q-switched laser with acousto-optic modulator (AOM) and WS2 saturable absorber is presented. The shortest pulse width of 91 ns corresponding to a highest peak power of 1.2 kW is obtained when the modulation rate (MR) of AOM is 1 kHz. In comparison to the singly Q-switched lasers with WS2 or AOM, the maximum pulse width compression ratio is 15.38 and the highest peak power enhancement factor is 511.30. The experiment results show a promising saturable absorption of WS2 and that the doubly Q-switched laser is beneficial for compressing the pulse width and improving the peak power.
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