Graphene Mode-Locked Ultrafast Laser

Graphene Mode-Locked Ultrafast Laser

2 Sep 2009 | Z. Sun, T. Hasan, F. Torrisi, D. Popa, G. Privitera, F. Wang, F.Bonaccorso, D. M. Basko, A. C. Ferrari
This paper presents the development of a graphene-based ultrafast laser using graphene-polymer composites. The researchers fabricated these composites through wet-chemistry techniques, incorporating single-layer and few-layer graphene flakes into a host polymer matrix. The graphene flakes, which retain their electronic structure, exhibit saturable absorption due to Pauli blocking following intense illumination, allowing them to mode-lock an Erbium-doped fiber laser operating at 1559 nm. The laser produces a pulse train with a spectral bandwidth of 5.24 nm and a pulse duration of approximately 460 fs, demonstrating the potential of graphene as a saturable absorber for ultrafast laser applications. The study highlights the advantages of using graphene over traditional materials like semiconductor Saturable Absorber Mirrors (SESAMs) and Single Wall Carbon Nanotubes (SWNTs), particularly in terms of tuning range and cost-effectiveness. The results pave the way for graphene-based photonics and integrated photonic systems.This paper presents the development of a graphene-based ultrafast laser using graphene-polymer composites. The researchers fabricated these composites through wet-chemistry techniques, incorporating single-layer and few-layer graphene flakes into a host polymer matrix. The graphene flakes, which retain their electronic structure, exhibit saturable absorption due to Pauli blocking following intense illumination, allowing them to mode-lock an Erbium-doped fiber laser operating at 1559 nm. The laser produces a pulse train with a spectral bandwidth of 5.24 nm and a pulse duration of approximately 460 fs, demonstrating the potential of graphene as a saturable absorber for ultrafast laser applications. The study highlights the advantages of using graphene over traditional materials like semiconductor Saturable Absorber Mirrors (SESAMs) and Single Wall Carbon Nanotubes (SWNTs), particularly in terms of tuning range and cost-effectiveness. The results pave the way for graphene-based photonics and integrated photonic systems.
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Understanding Graphene mode-locked ultrafast laser.