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Q-switched erbium-doped fibre laser based on molybdenum disulfide and tungsten disulfide as saturable absorbers

1Mohamed K.H., 1Hamida B.A., 1Sheroz Khan, 1Hussein L.A., 1Ahmat M.O., 2El Ismail, 2Kadir N.A.A., 2Latif A.A. and 2Harun S.W.

1Department of Electrical Engineering, Faculty of Engineering, International Islamic University Malaysia (IIUM), Jalan Gombak, 53100 Kuala Lumpur, Malaysia
2Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia

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Abstract. A passively Q-switched erbium-doped fibre laser is experimentally implemented, using molybdenum disulfide (MoS2) and tungsten disulfide (WS2) as saturable absorbers. The results testify that a WS2-based Q-switched fibre laser generates more stable pulse trains, if compared with the MoS2-based saturable absorber. The wavelength region where the Q-switched pulses have been obtained is a so-called C-band region. The central wavelengths are 1559 and 1560 nm for MoS2 and WS2, respectively.

Keywords: Q-switching, erbium-doped fibres, MoS2, WS2, saturable absorbers

PACS: 42.60.Da, 42.55.Wd, 42.60.Gd
UDC: 535.37+681.7.068
Ukr. J. Phys. Opt. 18 20-27
doi: 10.3116/16091833/18/1/20/2017
Received: 08.11.2016

Анотація. Експериментально реалізовано ербієвий волоконний лазер з пасивною модуляцією добротності, який використовує дисульфід молібдену (MoS2) і дисульфід вольфраму (WS2 як насичені поглиначі. Результати засвідчують, що побудований на WS2 волоконний лазер генерує стабільніші послідовності імпульсів, порівняно з випадком насиченого поглинача на основі MoS2. Діапазон довжин хвиль, у якому було отримано з модульовані імпульси, відповідає так званій С-смузі. Центральні довжини хвиль для поглиначів на MoS2 і WS2 дорівнюють відповідно 1559 і 1560 нм.
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