Quantum dot cadmium selenide as a saturable absorber for Q-switched and mode-locked double-clad ytterbium-doped fiber lasers

Mahyuddin, Mohamad Badrol Hisyam and Latiff, Anas Abdul and Rusdi, Muhammad Farid Mohd and Irawati, Ninik and Harun, Sulaiman Wadi (2017) Quantum dot cadmium selenide as a saturable absorber for Q-switched and mode-locked double-clad ytterbium-doped fiber lasers. Optics Communications, 397. pp. 147-152. ISSN 0030-4018

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Official URL: https://doi.org/10.1016/j.optcom.2017.04.010

Abstract

This paper demonstrates the integration of quantum dot (QD) cadmium selenide (CdSe) nanoparticles, which is embedded into polymethyl methacrylate (PMMA) film into an ytterbium-doped fiber laser (YDFL) cavity to produce Q-switched and mode-locked fiber lasers. The QD CdSe based film functions as a saturable absorber (SA). For Q-switching operation, stable pulse is generated within 970–1200 mW pump power, with tunable repetition rate and pulse width of 24.5–40.5 kHz and 6.8–3.7 µs, respectively. Maximum pulse energy and peak power are obtained about 1.1 µJ and 0.28 W, respectively. As we tune the polarization state of the laser cavity and use a single QD CdSe film, the mode-locking operation could also be generated within 310–468 mW pump power with repetition rate of 14.5 MHz and pulse width of 3.5 ps. Maximum pulse energy and peak power are obtained about 2 nJ and 0.11 W, respectively. These results may contribute to continuous research work on laser pulse generation, providing new opportunities of CdSe material in photonics applications.

Item Type: Article
Uncontrolled Keywords: Quantum dot cadmium selenide nanomaterials; Saturable absorber; Mode-locking operation; Q-switching operation; Fiber laser
Subjects: 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: 23 Nov 2018 07:40
Last Modified: 23 Nov 2018 07:40
URI: http://eprints.um.edu.my/id/eprint/19723

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