Pure gold saturable absorber for generating Q-switching pulses at 2 µm in Thulium-doped fiber laser cavity
Document Type
Article
Publication Date
1-1-2019
Abstract
We experimentally demonstrate Q-switched Thulium-doped fiber laser operating at 1949.19 nm using pure gold saturable absorber (Au-SA) as a Q-switcher. The Au-SA was fabricated by depositing gold particles molecules using electron beam evaporation on the surface of a polyvinyl alcohol (PVA) film. Subsequently, stable Q-switched pulses were obtained within the 1552 nm pump power range from 343.1 to 467.3 mW, with repetition rate tuned from 11.7 kHz to 21.95 kHz. At 467.3 mW pump power, the TDFL produced pulses train with the pulse width of 2.6 μs and the maximum pulse energy of 89.8 nJ. These results propose that pure gold could be a promising saturable absorber for pulse generation in 2 µm wavelength region. © 2019
Keywords
Q-switching, Thulium-doped fiber laser, Pure gold saturable absorber
Divisions
fac_eng,photonics
Funders
University of Malaya (Grant No. FG006-17AFR),National Key R&D Program of China ( 2016YFE0126500 ),National Natural Science Foundation of China ( 61575050 ),Key Program for Natural Science Foundation of Heilongjiang Province of China ( ZD2016012 ),Open Fund of the State Key Laboratory on Integrated Optoelectronics ( IOSKL2016KF03 )
Publication Title
Optical Fiber Technology
Volume
50
Publisher
Elsevier