Ahmad, Harith and Kahar, Nor Hidayah Abdul and Yusoff, Norazriena and Hanafi, Ahmad Izzat Mohd and Ramli, Rizal and Harun, Sulaiman Wadi and Reduan, Siti Aisyah (2022) Passively mode-locked laser using HfSe2 as saturable absorber at 1.5?m and 2.0?m. Optics & Laser Technology, 155. ISSN 0030-3992, DOI https://doi.org/10.1016/j.optlastec.2022.108397.
Full text not available from this repository.Abstract
This research demonstrates mode-locked erbium-doped fiber laser (EDFL) and thulium-holmium doped fiber laser (THDFL) using hafnium diselenide (HfSe2) as saturable absorber (SA). The Kelly's sidebands were observed in both spectra, showing that both lasers operated in an anomalous dispersion region. A polarization controller was used to achieve reliable mode-locking operation at a threshold power of -46 mW and -254 mW for the EDFL and THDFL respectively. The center wavelengths obtained for the EDFL and THDFL were 1557 nm and 1912 nm, respectively. In EDFL, the output soliton generates 0.75 ps of pulse width and a repetition rate of 14.8 MHz, while THDFL has a pulse width of 1.15 ps and a repetition rate of 12.5 MHz. The pulses were highly stable for both gain mediums, verified by the signal-to-noise ratio (SNR) of 68 dB and 63 dB for EDFL and THDFL, respectively. In addition, there were no significant changes during the three-hour stability test, suggesting a longterm stability. This work shows a low-cost laser with possible application in C-band and near the 2.0 mu m region.
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Higher Education, Malaysia [Grant no. PRC-2014], Universiti Malaya [Grant no. RK021-2019, RU005-2021] |
| Uncontrolled Keywords: | Erbium-doped fiber; Hafnium diselenide; Microfiber; Mode-locking; Saturable absorber; Thulium–Holmium doped fiber |
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculty of Engineering > Department of Electrical Engineering Faculty of Science > Department of Physics Deputy Vice Chancellor (Research & Innovation) Office > Photonics Research Centre |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 03 Jun 2025 08:07 |
| Last Modified: | 03 Jun 2025 08:07 |
| URI: | http://eprints.um.edu.my/id/eprint/41847 |
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