Abstract
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.
© 2012 IEEE
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