Short-pulsed Q-switched Thulium doped fiber laser with graphene oxide as a saturable absorber

Kasim, Nabilah and Latiff, Anas Abdul and Rusdi, Muhammad Farid Mohd and Hisham, M.B. and Harun, Sulaiman Wadi and Razak, Nor Farhah (2018) Short-pulsed Q-switched Thulium doped fiber laser with graphene oxide as a saturable absorber. Optik, 168. pp. 462-466. ISSN 0030-4026, DOI

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This paper reports a generation of short-pulsed thulium-doped fiber laser (TDFL) in Q-switching operation incorporation of homemade graphene oxide (GO) saturable absorber (SA). The GO SA is embedded with a polymer to form a GO film. A piece of the GO film is integrated into the TDFL cavity for generating a self-started Q-switching operation at 1943 nm wavelength. The 3-dB bandwidth, repetition rate, and pulse width of the laser are obtained as 9 nm, 15.76 kHz–25.08 kHz, and 5.08 μs–4.2 μs, respectively. The maximum pulse energy of 0.698 μJ obtainable at 344 mW pump power, with a peak power of 137.4 mW. With a shortest pulse width size at a maximum pump power of 491 mW, the higher peak power is determined about 162 mW. By integrating our stable Q-switched laser with an optical amplifier, numerous applications such as a material cutting with the eye-safe feature can be realized. This shows a small piece of the GO can modulate a light and use for the pulsed laser industry.

Item Type: Article
Funders: Universiti Teknologi Malaysia (Grant No: R.J130000.7826.4F928)
Uncontrolled Keywords: Fiber laser; Q-switching operation; Graphene; Saturable absorber
Subjects: Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Deputy Vice Chancellor (Research & Innovation) Office > Photonics Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 19 Jul 2019 09:05
Last Modified: 19 Jul 2019 09:05

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