Wavelength switchable Q-switched fiber laser based on Fe3O4 nanoparticles

We experimentally demonstrate an erbium-doped Q-switched fiber laser at 1.5µm by incorporating Fe3O4 nanoparticles as a saturable absorber. A novel approach for SA formation is demonstrated by using the bubble poking method, through which we can fabricate SA films with different thicknesses with eas...

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Bibliographic Details
Published inOptik (Stuttgart) Vol. 243
Main Authors Yao, Junna, Jiang, Xinhua, Wang, Anting, Wang, Jinghao, Chen, Ruishan, Zhang, Jialang, Zhan, Qiwen
Format Journal Article
LanguageEnglish
Published Elsevier GmbH 01.10.2021
Subjects
Bubble poking method
Fe3O4 nanoparticles
Fiber lasers
Q-switched
Q-switched
Fe3O4 nanoparticles
Bubble poking method
Fiber lasers
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Summary:We experimentally demonstrate an erbium-doped Q-switched fiber laser at 1.5µm by incorporating Fe3O4 nanoparticles as a saturable absorber. A novel approach for SA formation is demonstrated by using the bubble poking method, through which we can fabricate SA films with different thicknesses with ease by changing the number of times of poking the bubbles. The fabricated SA possesses a modulation depth of ∼3.9% and saturable intensity of ∼0.57 MW/cm2. By inserting the SA into the laser cavity, Q-switched laser output is achieved at a pump threshold of 50mW and the central wavelength can be switched when the pump power is above 70mW. This Q-switched all-fiber laser operates stably with a maximum single pulse energy of 126nJ, a maximum repetition rate of 57.5kHz and a minimum pulse width of 5.7µs.
ISSN:0030-4026
1618-1336
DOI:10.1016/j.ijleo.2021.167279