Graphene-based Saturable Absorber for Pulsed Fiber Laser Generation

Abstract

Recently, graphene has been considered as great candidate to be applied as the saturable absorber (SA) with its brilliant optical characteristics such as ultrafast recovery time and ultra-wideband absorption due to its zero bandgap energy and linear dispersion of Dirac electrons. This paper focuses on reviewing the generation of short pulses from passive mode-locked fiber lasers that employ graphene-based saturable absorber (GBSA). Various parameters that make it excellent for generation ultra-short pulsed including modulation depth, nonlinearity, saturation intensity, self-amplitude modulation, its crystal lattice structure, band gap energy distribution are discuss in details. Furthermore, comparison between single layers and multilayer GBSA is made to explain the effect of layers number on the behaviour of SA in ring cavity fiber lasers.

Comparative Study of Q-Switched Erbium Doped Fibre Laser with SWCNT-PVA Saturable Absorber of Different Ratios

“…Several attempts had been made to substitute SESAM with graphene nanomaterials as its exclusive honeycomb lattice structure which is composed of atomic thick sp 2 hybridised carbon enlightens electron mobility [23]. The striking features of graphene enacted as a zero-gap semiconductor with overlapping valance and conduction bands due to the bonding () and antibonding (*) orbital besides the lattice mislocating impediment and crystal inadequacy at high temperatures managed to carry it out as an auspicious SA with preferable performance [24][25][26].…”

Characterizations of Nanodiamond Composite Film for Photonics Applications

“…Carbon is a well-known form of solid-state allotropes with various properties and structure, such as sp 3 -bonded diamond, and sp 2 bonded graphite [16,17]. In the past decades, novel carbonbased nanomaterials entirely composed of sp 2 hybridized carbon atoms have been sophisticated in dimensionalities extended from fullerenes with zero-dimensional, carbon nanotubes (CNTs) with onedimensional and CNTs to graphene with two-dimensional [1,14,18,72]. Diamond is a sp 3 hybridization protracted network of three-dimensional of carbon atoms.…”