Ahmad, Harith and Ooi, Shok Ing and Tiu, Zian Cheak and Ismail, Mohd Faizal and Zulkfili, M. Z. and Yasin, Mohamad and Thambiratnam, Kavintheran (2021) Passively Q-switched thulium fluoride fiber laser operating in S-band region using N-doped graphene saturable absorber. Indian Journal of Physics, 95 (9). pp. 1837-1842. ISSN 0973-1458, DOI https://doi.org/10.1007/s12648-020-01815-2.
Full text not available from this repository.Abstract
A passively Q-switched S-band fiber laser is proposed and demonstrated using a thulium-doped fluoride fiber as laser gain medium. The proposed design possesses significant advantages including broader tuning wavelength range as compared to previously reported Q-switched S-band lasers. The laser cavity is configured in a simple forward-pumped ring design with a 1400 nm single upconversion pumping scheme. Q-switching is achieved using a polyvinyl alcohol/nitrogen-doped graphene nanosheet (PVA-N-Gns)-based thin-film saturable absorber. Stable Q-switched pulses are obtained at a center wavelength of 1504.7 nm over a pump power range from 101.8 to 280.6 mW. The generated pulses have a maximum pulse repetition rate of 36.85 kHz and minimum pulse width of 4.8 mu s at the pump power of 280.6 mW. The maximum pulse output power of 1.30 mW indicates a laser efficiency of approximately 0.63% while a signal-to-noise ratio of 57 dB shows pulse stability. The ability of the proposed cavity design to produce broad wavelength tunability range from 1450 to 1510 nm make it highly suitable for various application in the S and S + band regions.
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Higher Education, (MOHE) Malaysia under the grants HiCoE Phase II Funding, Universiti Malaya[RU 011-2019] |
| Uncontrolled Keywords: | Passive Q-switched;S-band;Nitrogen-doped graphene |
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculty of Science |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 23 Aug 2022 04:40 |
| Last Modified: | 23 Aug 2022 04:40 |
| URI: | http://eprints.um.edu.my/id/eprint/28868 |
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