Lasers, Fiber Optics, and Communications

High-power Q-switched erbium-ytterbium codoped fiber laser using multiwalled carbon nanotubes saturable absorber

[+] Author Affiliations
Mohd Zulhakimi Ab Razak

Universiti Kebangsaan Malaysia, Institute of Microengineering and Nanoelectronics, Bangi, Selangor 43600, Malaysia

Zatul Saliza Saleh, Carol Livan Anyi, Sulaiman W. Harun, Hamzah Arof

University of Malaya, Department of Electrical Engineering, Faculty of Engineering, Kuala Lumpur 50603, Malaysia

Fauzan Ahmad

Universiti Teknologi Malaysia, Malaysia-Japan International Institute of Technology, Kuala Lumpur 54100, Malaysia

Opt. Eng. 55(10), 106112 (Oct 18, 2016). doi:10.1117/1.OE.55.10.106112
History: Received April 5, 2016; Accepted September 23, 2016
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Abstract.  Due to an enormous potential of pulsed lasers in applications such as manufacturing, metrology, environmental sensing, and biomedical diagnostics, a high-power and stable Q-switched erbium-ytterbium codoped double-clad fiber laser (EYDFL) incorporating of multiwall carbon nanotubes (MWCNTs) saturable absorber (SA) made based on polyvinyl alcohol (PVA) with a 32 ratio is demonstrated. The SA was fabricated by mixing a dilute PVA solution with an MWCNTs homogeneous solution. Subsequently, the mixture was sonicated and centrifuged to produce a homogeneous suspension that was left to dry at room temperature to form the MWCNTs-PVA film. The SA was formed by inserting the film between a pair of FC/PC fiber connectors. Then, it was integrated into the EYDFL’s ring cavity, which uses a 5-m-long erbium-ytterbium codoped fiber (EYDF). The lasing threshold for the Q-switched EYDFL was at 330 mW. At the maximum available pump power of 900 mW, the proposed EYDFL produced Q-switched pulses with a repetition rate of 74.85 kHz, pulsewidth of 3.6  μs, and an average output power of about 5 mW. The maximum energy per pulse of 85  nJ was obtained at pump power of 700  mW with peak power of 21 mW.

Figures in this Article
© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Mohd Zulhakimi Ab Razak ; Zatul Saliza Saleh ; Fauzan Ahmad ; Carol Livan Anyi ; Sulaiman W. Harun, et al.
"High-power Q-switched erbium-ytterbium codoped fiber laser using multiwalled carbon nanotubes saturable absorber", Opt. Eng. 55(10), 106112 (Oct 18, 2016). ; http://dx.doi.org/10.1117/1.OE.55.10.106112


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