Citation

Lee, Lian Hong and Diblawe, Abdulkadir Mukhtar and Hong, Lip Zhan and San, Cheng Xiau and Tiu, Zian Cheak and Harun, Sulaiman Wadi (2025) Q-Switched 2 µm fiber laser with molybdenum ditelluride saturable absorber. Journal of Russian Laser Research. ISSN 1071-2836

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Abstract

In this experiment, we demonstrate the application of a Molybdenum ditelluride (MoTe2) thin film as a saturable absorber (SA) for inducing Q-switching in the 2.0 µm region. The fabrication of the MoTe2 involved a bottom-up approach, where a three-electrode configuration was employed for electrodeposition onto a conductive film substrate. This method offers distinct advantages over conventional top-down approaches, as it proves to be more cost-effective and provides greater control over film thickness through precise manipulation of deposition time. The MoTe2 thin film, nestled between two fiber ferrules, is seamlessly integrated into a Thulium-doped fiber laser (TDFL) cavity. Through this setup, we successfully realized a stable switched laser operating at 1910.3 nm, boasting a repetition rate of 4.61 kHz and a corresponding pulse width of 3.05 µs. Notably, the achieved pulse energy measured at 4.158 nJ, while the output power reached 0.173 mW under a maximum pump power of 677.04 mW at 1552 nm. These results indicate the promising potential of MoTe2 thin films as efficient and reliable SAs for advancing Q-switched fiber laser technology in the mid-infrared spectral regime.

Item Type:	Article
Uncontrolled Keywords:	Molybdenum
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN600-799 Metallurgy
Divisions:	Faculty of Engineering and Technology (FET)
Depositing User:	Ms Rosnani Abd Wahab
Date Deposited:	30 Sep 2025 08:15
Last Modified:	05 Oct 2025 15:31
URII:	http://shdl.mmu.edu.my/id/eprint/14607

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