Q-switched ytterbium-doped fiber laser via a thulium-doped fiber saturable absorber

Rahman, Mohd Fauzi Ab and Latiff, Anas Abdul and Rusdi, Muhammad Farid Mohd and Dimyati, Kaharudin and Harun, Sulaiman Wadi (2018) Q-switched ytterbium-doped fiber laser via a thulium-doped fiber saturable absorber. Applied Optics, 57 (22). pp. 6510-6515. ISSN 1559-128X

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Official URL: https://doi.org/10.1364/AO.57.006510

Abstract

We demonstrated a reliable and stable Q-switched ytterbium-doped fiber laser centered at 1069 nm by employing a segment of 11 cm thulium-doped fiber (TDF) as a saturable absorber (SA) in the ring cavity. The fiber SA has an optical absorption of 1.35 dB at the Q-switched operating regime. As we increased the pump power from 109 mW to the maximum available pump power of 206 mW, a consistent Q-switched laser with output power ranging from 1.8 to 4.8 mW was attained. The pulse width narrowed from 4.9 to 2.87 μs, whereas the repetition rate increased from 40 to 60.2 kHz. In addition, maximum pulse energy of 80.7 nJ and a maximum peak power of 28.1 mW were obtained at the maximum pump power. The signal to noise ratio (SNR) was around 47 dB. Our experimental study shows that a segment of TDF can be used as a Q-switcher in the 1 μm fiber laser cavity to facilitate a reliable and robust microsecond pulse generation.

Item Type: Article
Uncontrolled Keywords: Maximum pump power; Operating regimes; Pulse energies; Pulse generation; Repetition rate; Ring cavities; Thulium-doped fibers; Ytterbium-doped fiber lasers
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 17 Apr 2019 08:49
Last Modified: 17 Apr 2019 08:49
URI: http://eprints.um.edu.my/id/eprint/20977

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