Thulium-holmium doped fiber laser mode-locking with hafnium disulfide (HfS2) coated on D-shaped fiber

Ahmad, Harith and Kahar, Nor Hidayah Abdul and Yusoff, Norazriena and Reduan, Siti Aisyah (2021) Thulium-holmium doped fiber laser mode-locking with hafnium disulfide (HfS2) coated on D-shaped fiber. Optik, 246. ISSN 0030-4026, DOI

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The performance of hafnium disulfide (HfS2) was demonstrated in this study to generate a modelocked pulse in a thulium-holmium doped fiber laser (THDFL). The drop-cast method was used to deposit HfS2 solution onto a D-shaped single-mode optical fiber. The fabricated D-shaped fiber had a modulation depth and saturation intensity of 12.3% and 7.53 MW/cm2, respectively, according to nonlinear optical absorption measurements. The evanescent wave interaction with the HfS2 based SA embedded on a D-shaped optical fiber resulted in a mode-locked pulse at a pump power of 208.6 mW with a central wavelength and pulse duration of 1916.29 nm and 1.509 ps, respectively. Meanwhile, raising the pump power to 208.6 mW results in a repetition rate of 11.10 MHz. The output shows a stable mode-locked THDFL pulse with a signal to noise ratio (SNR) of around 75.74 dB. Overall, this research focuses on the potential of HfS2 used as SA coated on a D-shaped optical fiber for the generation of short pulses in a 2 mu m band region.

Item Type: Article
Funders: Universiti Malaya[RK021-2019], Universiti Malaya[TOP100PRC], Universiti Malaya[RU002-2020], Ministry of Education, Malaysia[HiCoE Phase II (PRC-2014)]
Uncontrolled Keywords: Saturable absorber; D-shaped fiber; Hafnium disulfide; Mode-locking; Thulium-holmium doped fiber laser
Subjects: Q Science > QC Physics
Divisions: Faculty of Science
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 15 Apr 2022 01:50
Last Modified: 15 Apr 2022 01:50

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