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

Mohd Zulhakimi Ab Razak; Zatul Saliza Saleh; Fauzan Ahmad; Caroline Livan Anyi; Sulaiman Wadi Harun; Hamzah bin Arof

doi:10.1117/1.OE.55.10.106112

18 October 2016 High-power Q-switched erbium-ytterbium codoped fiber laser using multiwalled carbon nanotubes saturable absorber

Mohd Zulhakimi Ab Razak, Zatul Saliza Saleh, Fauzan Ahmad, Caroline Livan Anyi, Sulaiman Wadi Harun, Hamzah bin Arof

Author Affiliations +

Optical Engineering, Vol. 55, Issue 10, 106112 (October 2016). https://doi.org/10.1117/1.OE.55.10.106112

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 3∶2 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.

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Mohd Zulhakimi Ab Razak, Zatul Saliza Saleh, Fauzan Ahmad, Caroline Livan Anyi, Sulaiman Wadi Harun, and Hamzah bin Arof "High-power Q-switched erbium-ytterbium codoped fiber laser using multiwalled carbon nanotubes saturable absorber," Optical Engineering 55(10), 106112 (18 October 2016). https://doi.org/10.1117/1.OE.55.10.106112

Published: 18 October 2016

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