Journal
PHOTONICS RESEARCH
Volume 6, Issue 9, Pages 893-899Publisher
CHINESE LASER PRESS
DOI: 10.1364/PRJ.6.000893
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Funding
- National Natural Science Foundation of China (NSFC) [11174159, 11304166, 61405139, 61475076]
- Natural Science Foundation of Tianjin City [14JCYBJC16400]
- International Cooperation Program - Ministry of Education of the People's Republic of China (MOE)
- Chinese National Key Basic Research Special Fund [2011CB922003]
- National Science Fund for Talent Training in Basic Sciences [J1103208]
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We report a passively Q-switched and mode-locked erbium-doped fiber laser (EDFL) based on PtSe2, a new two-dimensional material, as a saturable absorber (SA). Self-started Q-switching at 1560 nm in the EDFL was achieved at a threshold pump power of 65 mW, and at the maximum pump power of 450 mW, the maximum single Q-switched pulse energy is 143.2 nJ. Due to the polarization-dependent characteristics of the PtSe2-based SA, the laser can be switched from the Q-switched state to the mode-locked state by adjusting the polarization state. A mode-locked pulse train with a repetition rate of 23.3 MHz and a pulse width of 1.02 ps can be generated when the pump power increases to about 80 mW, and the stable mode-locked state is maintained until the pump power reaches its maximum 450 mW. The maximum single mode-locked pulse energy is 0.53 nJ. This is the first time to our knowledge that successful generation of stable Q-switched and mode-locked pulses in an Er-doped fiber laser has been obtained by using PtSe2 as a saturable absorber. (C) 2018 Chinese Laser Press
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