Passively Q-switched fiber laser tunable by Sagnac interferometer operation

Noor, S.F.S.M. and Zulkipli, Nur Farhanah and Ahmad, Harith and Harun, Sulaiman Wadi (2019) Passively Q-switched fiber laser tunable by Sagnac interferometer operation. Optik, 179. pp. 1-7. ISSN 0030-4026

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Official URL: https://doi.org/10.1016/j.ijleo.2018.10.190

Abstract

In this paper, a stable passively Q-switched Erbium-doped fiber laser (EDFL) tunable by Sagnac interferometer operation was described by using a graphene oxide saturable absorber (SA) as a Q-switcher. The wavelength operation of the Q-switched EDFL was tunable from 1566.3 nm to 1559.3 nm by increasing the temperature of sagnac loop mirror (SLM) from 30 °C to 70 °C in the figure-of-eight laser configuration. At 1566.3 nm operation, by increasing the pump from the threshold power of 77.3 mW to 126.5 mW, the repetition rate can be increased from 30.7 kHz to 41.5 kHz while the pulse width was narrowed from 10.2 to 7.3 μs. The Q-switching threshold pump power increased with the increase of the temperature, which then shifted the operation to a shorter wavelength. However, the laser efficiency increased at a shorter wavelength operation. At 1561.4 nm operation, the maximum pulse energy of 20.5 nJ was obtained at 161.0 mW pump power.

Item Type: Article
Uncontrolled Keywords: Fiber lasers; Q-switching operation; Sagnac loop mirror; Temperature tuning
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 17 Jan 2019 01:19
Last Modified: 17 Jan 2019 01:19
URI: http://eprints.um.edu.my/id/eprint/20018

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