Cobalt oxide nanocubes thin film as saturable absorber for generating Q-switched fiber lasers at 1 and 1.5 µm in ring cavity configuration

Al-Masoodi, Ahmed Hasan Hamood and Alani, Ibrahim A.M. and Ahmed, Mahmoud Hazzaa M. and Al-Masoodi, Abtisam Hasan Hamood and Alani, Ahmed A. and Wang, Pengfei and Harun, Sulaiman Wadi (2018) Cobalt oxide nanocubes thin film as saturable absorber for generating Q-switched fiber lasers at 1 and 1.5 µm in ring cavity configuration. Optical Fiber Technology, 45. pp. 128-136. ISSN 1068-5200, DOI

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We experimentally demonstrate Q-switched fiber lasers based on Ytterbium-doped fiber laser (YDFL) and Erbium-doped fiber laser (EDFL) cavity using cobalt oxide (Co3O4) nanocubes film as a saturable absorber (SA) to operate at 1043.64 nm and 1560.4 nm respectively. This material is embedded into polyethylene oxide (PEO) film to obtain a high nonlinear optical response that can be used for SA application. The Co3O4 nanocubes film was fabricated by a simple processing technique and it has a modulation depth of 4% and saturation intensity of 56 MW/cm2. By incorporating the Co3O4 nanocubes SA into the YDFL cavity, a stable Q-switched pulse train was generated with repetition rate increasing from 60.3 to 86.66 KHz, by increasing the pump power from 144.4 to 165.4 mW. At the pump power of 147.9 mW the pulse width and pulse energy are 4 µs and 154 nJ respectively. The EDFL generates a stable Q-switched pulses with repetition rate of 119.7 KHz, pulse width of 2.4 µs and pulse energy of 6 nJ at maximum pump power of 141 mW. This results propose that cobalt oxide could be a promising broadband SA for all fiber lasers wavelengths at 1 and 1.5 µm.

Item Type: Article
Funders: University of Malaya (Grant No. FG006-17AFR ), Al-Madinah International University (MEDIU) , Malaysia (Grant No: RMC-MEDIU003/E/2018 ), SAFEA P. R. China: OEI under "Belt and Road Initiative" in Cultural and Educational Sector, National Key R & D program ( 2016YFE0126500 ), Open Fund of the State Key Laboratory on Integrated Optoelectronics ( IOSKL2016KF03 ), "111" Project (B13015) to the Harbin Engineering University
Uncontrolled Keywords: Q-switched; Ytterbium-doped fiber; Erbium-doped fiber; Cobalt oxide Saturable absorber
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 > Department of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 24 Sep 2019 07:07
Last Modified: 24 Sep 2019 07:07

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