Realization of high-performance tri-layer graphene saturable absorber mirror fabricated via a one-step transfer process

Abstract

Graphene, as a saturable absorber (SA), has attracted much attention for its application in ultrashort pulse fiber lasers due to its ultrafast interband carrier relaxation and ultra-broadband wavelength operation. Nevertheless, during the stacking process of monolayer graphene layer, the induced nonuniform contact at the interface of graphene layers deteriorate the device performance. Herein, we report the fabrication of graphene saturable absorber mirrors (SAMs) via a one-step transfer process and the realization of the much enlarged modulation depth and the much reduced nonsaturable loss with tri-layer graphene (TLG) than single-layer graphene (SLG) due to the improved uniform contact at the interface. Moreover, the operation of 1550 nm mode-locked Er-doped fiber laser with the TLG SAM exhibits excellent output characteristics of the maximum output power of 9.9 mW, a slope efficiency of 2.4% and a pulse width of 714 fs. Our findings are expected to pave the way toward high-performance ultrashort pulse fiber lasers based on graphene SAs.

Graphene and Carbon Nanotube Dual-Decorated SiOx Composite Anode Material for Lithium-Ion Batteries

“…Moreover, high capacity (over 1200 mA h g –1 ) is coupled with a large volume swell during the Li + intercalation process, thus adversely affecting the electrode structure in terms of integrity and cycle stability . Moreover, the unstable solid electrolyte interphase (SEI) layer of SiO x together with considerable volume changes constantly decreases Coulombic efficiency. , Thus, several studies have proven that introducing carbon components into SiO x particles is an effective approach to form composite materials for improving conductivity and relieving the volume effect. − Graphene has high intrinsic conductivity and good mechanical property with a single-atom layer two-dimensional structure. , Carbon nanotube (CNT) is a one-dimensional structure with high electrical conductivity and structural stability. , Introducing graphene or CNTs with SiO x -forming composite anode materials can improve electrical conductivity, restrain the volume changes, and help form a steady SEI film. , However, many related composite material preparations require complicated and costly synthetic methods, thus hindering practical production and application …”

“…13−15 Graphene has high intrinsic conductivity and good mechanical property with a single-atom layer two-dimensional structure. 16,17 Carbon nanotube (CNT) is a one-dimensional structure with high electrical conductivity and structural stability. 18,19 Introducing graphene or CNTs with SiO x -forming composite anode materials can improve electrical conductivity, restrain the volume changes, and help form a steady SEI film.…”