Passively Q-switched erbium-doped fiber laser using quantum dots CdSe embedded in polymer film as saturable absorber

Ismail, Ezzatul Irradah and Kadir, N.A.A. and Latiff, Anas Abdul and Arof, Hamzah and Harun, Sulaiman Wadi (2019) Passively Q-switched erbium-doped fiber laser using quantum dots CdSe embedded in polymer film as saturable absorber. Optical and Quantum Electronics, 51 (6). p. 182. ISSN 0306-8919, DOI https://doi.org/10.1007/s11082-019-1897-6.

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Official URL: https://doi.org/10.1007/s11082-019-1897-6

Abstract

We demonstrate a passively Q-switched erbium doped fiber laser (EDFL) based on quantum dots (QD) CdSe as a saturable absorber (SA). The synthesized CdSe powder was embedded into a poly(methyl methacrylate) (PMMA) using emulsion polymerization process. The film is sandwiched between two fiber connector via an adapter to form a fiber-compatible SA device. By integrating the SA device into the EDFL ring cavity, the stable Q-switched operation is achieved at 1559.35 nm as the pump power is varied within 30–118 mW. The laser has a pump threshold of 20.4 mW. The pulse repetition rate shows an increasing trend from 33.2 to 68.45 kHz, whereas the pulse width exhibits a decreasing trend from 10.04 to 4.30 μs as the pump power is increased from 30 to 118 mW. The highest pulse energy of 11.83 nJ is obtained at a pump power of 118 mW. These results indicate that QD CdSe is a promising SA for Q-switching laser operation. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.

Item Type: Article
Funders: UNSPECIFIED
Uncontrolled Keywords: Q-switching; Quantum dots CdSe; Saturable absorber
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 22 Mar 2020 10:17
Last Modified: 22 Mar 2020 10:17
URI: http://eprints.um.edu.my/id/eprint/24083

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