Published in
Institute of Electrical and Electronics Engineers, IEEE Photonics Technology Letters, 1(28), p. 7-10, 2016
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Graphene Mode-Locked Fiber Laser at 2.8 $μ \text{m}$
,
Shuo Xu,
Yao Li,
Xinli Guo,
Kaushik Balakrishnan,
Robert A. Norwood,
Nasser Peyghambarian
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Abstract
Mid-infrared erbium (Er3+)-doped ZrF4-BaF2-LaF3-AlF3-NaF fiber laser mode-locked by multilayer graphene saturable absorber was demonstrated. Mode-locked pulses at 2.8 μm with an average output power of 18 mW at a repetition rate of 25.4 MHz, corresponding to a pulse energy of 0.7 nJ, were obtained. The pulsewidth was measured to be ∼42 ps by a home-made autocorrelator. Our experiment has validated the mode-locking capability of graphene in the 3-μm wavelength region.