Tunable wide spacing all-fiber dual-wavelength holmium-doped fiber laser using a Lyot filter operating above 2 μm

Ahmad, Harith and Chiam, J W and Samion, M Z and Zaini, M K A and Zulkifli, Mohd Zamani and Thambiratnam, Kavintheran (2023) Tunable wide spacing all-fiber dual-wavelength holmium-doped fiber laser using a Lyot filter operating above 2 μm. Laser Physics, 34. pp. 1-6. ISSN 1054660X

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Abstract

In this work, we successfully demonstrated an all-fiber, dual-wavelength holmium-doped fiber laser (HDFL) with a tunable wavelength spacing range of 8 nm to 24 nm. The HDFL utilizes a Lyot filter to obtain a stable dual wavelength output, with the Lyot filter being constructed from a polarizer, a 20 m polarizing maintaining fiber (PMF) and two polarization controllers (PCs). The dual-wavelength HDFL has an operating wavelength range from 2072.1 nm to 2097.2 nm and a maximum spacing of 24 nm between the lasing wavelengths as well as a signal-to-noise ratio of up to 45 dB and a side mode suppression ratio as low as 0.15 dB. The HDFL is highly stable, with the lasing output have a low power fluctuation of only 2.3 dB over a continuous operation period of 75 min. The proposed HDFL would have substantial applications as a low cost laser source for sensing applications beyond the 2 μm region, particularly those that require a control signal.

Item Type:	Article (Journal)
Uncontrolled Keywords:	holmium-doped fiber, dual-wavelength, Lyot fi
Subjects:	Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Department of Physics Kulliyyah of Science
Depositing User:	Ts. Dr. Kavintheran Thambiratnam
Date Deposited:	20 Dec 2024 10:23
Last Modified:	20 Dec 2024 10:23
URI:	http://irep.iium.edu.my/id/eprint/116951

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