Atomic‐Layer Graphene as a Saturable Absorber for Ultrafast Pulsed Lasers

@article{Bao2009AtomicLayerGA,
  title={Atomic‐Layer Graphene as a Saturable Absorber for Ultrafast Pulsed Lasers},
  author={Qiaoliang Bao and Han Zhang and Yu Wang and Zhenhua Ni and Yongli Yan and Ze Xiang Shen and Kian Ping Loh and Dingyan Tang},
  journal={Advanced Functional Materials},
  year={2009},
  volume={19}
}
The optical conductance of monolayer graphene is defined solely by the fine structure constant, α = $e^2 /\hbar c$ (where e is the electron charge, $\hbar $ is Dirac's constant and c is the speed of light). The absorbance has been predicted to be independent of frequency. In principle, the interband optical absorption in zero‐gap graphene could be saturated readily under strong excitation due to Pauli blocking. Here, use of atomic layer graphene as saturable absorber in a mode‐locked fiber… 

Graphene-based saturable absorber for high average-power fiber lasers

Owing to its strong optical characteristics, graphene has emerged in the field of ultrafast lasers as a prominent saturable absorber. In this communication, we present a passively mode-locked Er:Yb

Graphene-based saturable absorbers in semiconductor lasers

  • S. HusainiR. Bedford
  • Physics
    Photonics West - Lasers and Applications in Science and Engineering
  • 2014
Due to its unique zero-bandgap structure, linear disperion of electrons and compatibility with various optoelec- tronic platforms, graphene has become one of the principal materials of interest with

Graphene-clad microfibre saturable absorber for ultrafast fibre lasers

TLDR
This work exploits a graphene-clad microfibre (GCM) saturable absorber in a mode-locked fibre laser for the generation of ultrafast pulses and proposes an all-surface technique that can guarantee a higher efficiency of light–graphene interactions than the aforementioned techniques.

Monolayer graphene as a saturable absorber in a mode-locked laser

We demonstrate that the intrinsic properties of monolayer graphene allow it to act as a more effective saturable absorber for mode-locking fiber lasers when compared to multilayer graphene. The

Ultrafast Nonlinear Optical Properties of a Graphene Saturable Mirror in the 2 μm Wavelength Region

Mid‐infrared ultrafast lasers have emerged as a promising platform for both science and industry because of their inherent high raw power and eye‐safe spectrum. 2D nanostructures such as graphene

Graphene Saturable Absorption and Applications in Fiber Laser

Graphene as an ideal ultra-thin two-dimensional (2D) form of carbon has not only unique electronic but also wonderful broadband nonlinear optics. Particularly, under strong laser radiation, graphene

Graphene-based Saturable Absorber for Pulsed Fiber Laser Generation

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

High-energy all-normal-dispersion graphene mode-locked Yb-doped fiber laser

Since the first report of graphene-based ultrafast erbium-doped fiber laser in 2009 [1], most of follow-up studies have been concentrated on performance optimization and improvement of graphene

Broadband Graphene Saturable Absorber for Pulsed Fiber Lasers at 1, 1.5, and 2 μm

Ultrafast fiber lasers with broad spectral coverage are in great demand for a variety of applications, such as spectroscopy, and biomedical diagnosis. Graphene is an ideal ultrawide-band saturable

Monolayer graphene saturable absorbers with strongly enhanced evanescent-field interaction for ultrafast fiber laser mode-locking.

TLDR
An efficient all-fiber saturable absorber (SA) that evanescently interacts with a graphene monolayer by employing an over-cladding structure on high-quality monolayers that uniformly covered the side-polished fiber is demonstrated.
...

References

SHOWING 1-10 OF 61 REFERENCES

Large energy soliton erbium-doped fiber laser with a graphene-polymer composite mode locker

Due to its unique electronic property and the Pauli blocking principle, atomic layer graphene possesses wavelength-independent ultrafast saturable absorption, which can be exploited for the ultrafast

Fine Structure Constant Defines Visual Transparency of Graphene

TLDR
It is shown that the opacity of suspended graphene is defined solely by the fine structure constant, a = e2/hc � 1/137 (where c is the speed of light), the parameter that describes coupling between light and relativistic electrons and that is traditionally associated with quantum electrodynamics rather than materials science.

Measurement of the optical conductivity of graphene.

TLDR
Graphene yielded a spectrally flat optical absorbance in agreement with a constant absorbance of pialpha, or a sheet conductivity of pie2/2h, predicted within a model of noninteracting massless Dirac fermions, which is explained by including the effects of doping and finite temperature, as well as contributions from intraband transitions.

Gate-Variable Optical Transitions in Graphene

TLDR
The strong and layer-dependent optical transitions of graphene and the tunability by simple electrical gating hold promise for new applications in infrared optics and optoelectronics.

Large-scale pattern growth of graphene films for stretchable transparent electrodes

TLDR
The direct synthesis of large-scale graphene films using chemical vapour deposition on thin nickel layers is reported, and two different methods of patterning the films and transferring them to arbitrary substrates are presented, implying that the quality of graphene grown by chemical vapours is as high as mechanically cleaved graphene.

Graphene thickness determination using reflection and contrast spectroscopy.

TLDR
Two easy-to-use methods to determine the number of graphene layers based on contrast spectra are provided: a graphic method and an analytical method, which show that the refractive index of graphene is different from that of graphite.

Resonant optical nonlinearities in semiconductors

  • E. Garmire
  • Physics
    IEEE Journal of Selected Topics in Quantum Electronics
  • 2000
Semiconductors provide some of the most promising materials for nonlinear optics, because of large resonant nonlinearities, control of recombination time (from milliseconds to femtoseconds),

Ultrafast fiber pulsed lasers incorporating carbon nanotubes

We present the first passively mode-locked fiber lasers based on a novel saturable absorber incorporating carbon nanotubes (SAINT). This device offers several key advantages such as: ultrafast

Measurement of Ultrafast Carrier Dynamics in Epitaxial Graphene

Using ultrafast optical pump-probe spectroscopy, we have measured carrier relaxation times in epitaxial graphene layers grown on SiC wafers. We find two distinct time scales associated with the

Raman Studies of Monolayer Graphene: The Substrate Effect

Graphene has attracted a lot of interest for fundamental studies as well as for potential applications. Till now, micromechanical cleavage (MC) of graphite has been used to produce high-quality
...