Performance of passively Q-switched ring erbium-doped fiber laser using a multiwalled carbon nanotubes polyethylene oxide (PEO) polymer composite-based saturable absorber

Autor: C. L. Anyi, N.R. Zulkepely, Roslan Md Nor, Sulaiman Wadi Harun, N. M. Ali, Fauzan Ahmad, H. Haris, Hamzah Arof, A.R. Muhammad
Rok vydání: 2015
Předmět:
Zdroj: Microwave and Optical Technology Letters. 57:1897-1901
ISSN: 0895-2477
DOI: 10.1002/mop.29224
Popis: The aim of this article is to report the fabrication and characterization of dispersed multiwalled carbon nanotubes (MWCNTs) polymer composites and use them as passive SAs in Q-switched Erbium-doped fiber (EDF) for ultrafast laser generation at 1.5-µm region. CNT polymer composites were fabricated into thin films by homogenizing different concentrations (1.8, 4.8, and 10.1 wt. %) of MWCNTs with host polymers polyethylene oxide. The fabricated thin film was then deposited between two fiber connectors as passive SA and incorporated into fiber laser's ring oscillator. The EDFL exhibited a central wavelength of 1560.5 nm when pump power is fixed at 42 mW. The Q-switching operation starts at the lowest threshold of 39.3 mW for all the three different SA concentrations. For 1.8 wt. % MWCNTs concentration, the pulse repetition rate of the Q-switched EDFL is started from 35.6 kHz, while for 4.8 wt. % and 10.1 wt. %, the pulse repetition rate started at 78.5 and 66.1 kHz, respectively. At the MWCNTs concentration of 1.8 wt. %, the pulse energy of the Q-switched EDFL increases from 7.9 to 24.7 nJ as the pump power increases from 39.3 to 58.8 mW. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1897–1901, 2015
Databáze: OpenAIRE
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