Journal
OPTICAL FIBER TECHNOLOGY
Volume 62, Issue -, Pages -Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.yofte.2021.102468
Keywords
Mode-locking; Thulium-Holmium doped fiber; Nanocomposite; Saturable absorber; Side polished fiber
Funding
- University of Malaya [RK021-2019, TOP100PRC, RU002-2020]
- Ministry of Higher Education [HiCoE Phase II Funding]
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A novel method for passively mode-locking pulse generation in a THDFL system using MoWS2-rGO nanocomposite as a saturable absorber was demonstrated. The THDFL produces mode-locked pulses with a pulse duration of 1.5 ps, showing excellent stability and potential applications in various fields, especially in medicine.
Passive mode-locking pulse generation in a Thulium-Holmium doped fiber laser (THDFL) with molybdenum tungsten disulfide-reduced graphene oxide (MoWS2-rGO) nanocomposite saturable absorber (SA) was demonstrated for operation in 2.0 mu m wavelength regions. Mode-locked pulse was achieved by the evanescent wave interaction with the MoWS2-rGO based SA embedded on a side polished fiber. The THDFL produces mode-locked pulses centered at 1908.6 nm with a repetition rate and pulse duration of 11.9 MHz and 1.5 ps, respectively. A high signal to noise ratio (SNR) of 48 dB as well as minimal power and wavelength fluctuations indicates the excellent stability of the mode-locking operation. To the best of our knowledge, it is the first demonstration of MoWS2-rGO used as a SA in the THDFL system. The proposed laser would benefit various domains, mainly medicine, for its operation in the eye-safe 2.0 mu m wavelength region.
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