Chin. Phys. Lett.  2017, Vol. 34 Issue (11): 114201    DOI: 10.1088/0256-307X/34/11/114201
 FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
Dual-Wavelength Passively Q-Switched Ytterbium-Doped Fiber Laser Based on Aluminum Oxide Nanoparticle Saturable Absorbers
S. K. M. Al-Hayali1**, S. Selleri2, A. H. Al-Janabi1
2Department of Information Engineering, Parma University, Viale delle Scienze 181/A, Parma, Italy
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Abstract We report on generation of a dual-wavelength, all-fiber, passively Q-switched ytterbium-doped fiber laser using aluminum oxide nanoparticle (Al$_{2}$O$_{3}$-NP) thin film. A thin film of Al$_{2}$O$_{3}$ was prepared by embedding Al$_{2}$O$_{3}$-NPs into a polyvinyl alcohol (PVA) as a host polymer, and then inserted between two fiber ferrules to act as a saturable absorber (SA). By incorporating the Al$_{2}$O$_{3}$-PVA SA into the laser cavity, a stable dual-wavelength pulse output centered at 1050 and 1060.7 nm is observed at threshold pump power of 80 mW. As the pump power is gradually increased from 80 to 300 mW, the repetition rate of the generated pulse increases from 16.23 to 59 kHz, while the pulse width decreases from 19 to 6 μs. To the best of our knowledge, this is the first demonstration for this type of SA operating in the 1 μm region.
Received: 22 August 2017      Published: 25 October 2017
 PACS: 42.55.Wd (Fiber lasers) 42.60.Gd (Q-switching)
Fund: Supported by the Iraqi Ministry of Higher Education and Scientific Research, and University of Baghdad.
 TRENDMD: Cite this article: S. K. M. Al-Hayali, S. Selleri, A. H. Al-Janabi 2017 Chin. Phys. Lett. 34 114201 URL: http://cpl.iphy.ac.cn/10.1088/0256-307X/34/11/114201       OR      http://cpl.iphy.ac.cn/Y2017/V34/I11/114201