Graphene Oxide saturable absorber for generating eye-safe Q-switched fiber laser

International Technical Postgraduate Conference

Rosol, A.H.A.^1 ; Jusoh, Z.^3 ; Rahman, H.A.^1 ; Rusdi, M.F.M.^2 ; Harun, S.W.^2 ; Latiff, A.A.^4,5

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

40450, Malaysia^1

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

50603, Malaysia^2

Faculty of Electrical Engineering, University Teknologi Mara (Terengganu), Dungun, Terengganu

23000, Malaysia^3

Photonic Research Centre, University of Malaya, Kuala Lumpur

50603, Malaysia^4

Faculty of Electronic and Computer Engineering (FKEKK), Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, Durian Tunggal, Melaka

76100, Malaysia^5

关键词: Fiber connector;    Poly (vinyl alcohol) (PVA);    Pulse fiber laser;    Q-switched fiber lasers;    Repetition rate;    Spectral bandwidth;    Switching pulse;    Thulium-doped fibers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/210/1/012042/pdf
DOI  :  10.1088/1757-899X/210/1/012042

来源: IOP

【 摘 要 】

This paper reports the generation of Q-switched fiber laser using thulium doped fiber (TDF) as a gain medium and graphene oxide (GO) as a saturable absorber (SA). The GO powder is embedded into polyvinyl alcohol (PVA) to form an SA film based on a drop-casting technique. GO-SA film is sandwiched between two fiber connectors and tighten by FC adapter before it is incorporated into an TDF laser cavity for Q-switching pulse generation. At 344 mW pump level, a stable Q-switching regime presence at 1943 nm with a 3-dB spectral bandwidth of 9 nm. The maximum repetition rate, pulse width, and pulse energy are at 25 kHz, 4.2 μs, and 0.68 μJ, respectively. All finding results are comparable with other reported pulse fiber lasers.