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Er-Doped Fiber Laser Mode-Locked by CVD-Graphene Saturable Absorber

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8 Author(s)
Sobon, G. ; Laser & Fiber Electronics Group, Wroclaw University of Technology, Wroclaw, Poland ; Sotor, J. ; Pasternak, I. ; Grodecki, K.
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Erbium-doped fiber laser passively mode-locked by bilayer graphene is presented. The graphene layers were grown by chemical vapor deposition (CVD) on Cu substrate and transferred onto a fused silica window, forming a saturable absorber (SA). Low non-saturable losses and modulation depth as high as 55% allowed to achieve soliton pulses with over 11 nm bandwidth and nearly-transform limited 315 fs duration at 1564 nm center wavelength. The paper describes the design of the laser construction, as well as the graphene-SA preparation process. Our study demonstrates, that CVD-Cu graphene transferred on glass substrate may be used for efficient mode-locking of fiber lasers.

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Lightwave Technology, Journal of  (Volume:30 ,  Issue: 17 )