Q-switched double-clad Ytterbium-doped fiber laser using MoS2 flakes saturable absorber

International Technical Postgraduate Conference

Tey, K.L.^1 ; Rahman, M.F.A.^2,5 ; Rosol, A.H.A.^4 ; Rusdi, M.F.M.^2 ; Mahyuddin, M.B.H.^2 ; Harun, S.W.^2 ; Latiff, A.A.^3

Kumpulan Abex SDN Bhd (167376-M), Shah Alam Selangor

40400, Malaysia^1

Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur

50603, Malaysia^2

Photonic Research Centre, University of Malaya, Kuala Lumpur

50603, Malaysia^3

Faculty of Electrical Engineering, Universiti Teknologi Mara, Selangor, Shah Alam

40450, Malaysia^4

Faculty of Engineering Technology (FTK), Kampus Teknologi, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, Durian Tunggal, Melaka

76100, Malaysia^5

关键词: Fiber connector;    Mechanical exfoliation;    Passive Q-switched;    Repetition rate;    Ring cavities;    Switching operations;    Ytterbium doped fibers;    Ytterbium-doped fiber lasers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/210/1/012054/pdf
DOI  :  10.1088/1757-899X/210/1/012054

来源: IOP

【 摘 要 】

By sandwiching MoS2thin flakes between two fiber ferrule connectors in the ring cavity, we successfully demonstrate the passive Q-switched fiber laser operation. The cavity consists of all-fiber double-clad ytterbium-doped fiber (YDF) as a gain medium and MoS2tape as a saturable absorber (SA). The SA was prepared from a commercial MoS2crystal (∼ 99.8 % purity) through mechanical exfoliation process. A piece of 1 mm x 1 mm tape contains MoS2thin flakes was sandwiched between two fiber connectors. By controlling loss and gain in the cavity, stable Q-switching operation were generated. The repetition rate was tunable from 4.8 kHz to 17.2 kHz as the pump power is varied from 753 mW to 1133 mW. The obtained pulse width is also narrowed from 21.3 μs to 10.44 μs with the same variation of pump power.