Bulk α-alumina embedded tapered fiber as Q-switcher in an erbium-doped fiber laser

Citation

Mahdi, Mohd Adzir and Yusoff, Norita Mohd and Liew, Josephine Ying Chyi and Ng, Eng Khoon and Zain, Ahmad Rifqi Md and Alresheedi, Mohammed Thamer and Mayzan, Mohd Zul Hilmi (2024) Bulk α-alumina embedded tapered fiber as Q-switcher in an erbium-doped fiber laser. Physica Scripta, 99 (6). pp. 1-10. ISSN 0031-8949; eISSN: 1402-4896

Abstract

We present bulk alpha-alumina (Al2O3) embedded in a polydimethylsiloxane (PDMS) matrix and deposited on a tapered fiber as a Q-switcher for microsecond pulse generation. The integration of the Al2O3-based saturable absorber (SA) in an erbium-doped fiber laser produced a stable Q-switched regime within a pump power range of 62.0–308.6 mW. The laser achieved a shortest pulse width of 7 microseconds with a repetition rate tunable from 19.17 to 43.24 kHz. Compared with previous Al2O3-SA reports, this work demonstrates significant improvement, delivering pulse energy up to 150.32 nJ and an estimated damage threshold exceeding 6.75 GW/cm2. These results suggest that Al2O3-SA is a promising next-generation light-absorbing material for high-energy photonic devices.

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Additional Metadata

Item Type:	Article
Divisions:	Faculty of Engineering Faculty of Science
DOI Number:	https://doi.org/10.1088/1402-4896/ad447f
Publisher:	Institute of Physics Publishing
Keywords:	Aluminum oxide; Fiber laser; Q-switched; Saturable absorber
Depositing User:	Ms. Che Wa Zakaria
Date Deposited:	29 Oct 2025 03:42
Last Modified:	29 Oct 2025 03:42
Altmetrics:	http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1088/1402-4896/ad447f
URI:	http://psasir.upm.edu.my/id/eprint/120211
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