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Applied Physics Letters / Volume 97 / Issue 21 / LASERS, OPTICS, AND OPTOELECTRONICS

Appl. Phys. Lett. 97, 211102 (2010); http://dx.doi.org/10.1063/1.3521257 (3 pages)

Multilayered graphene efficiently formed by mechanical exfoliation for nonlinear saturable absorbers in fiber mode-locked lasers

You Min Chang1, Hyungseok Kim2, Ju Han Lee1, and Yong-Won Song2

1School of Electrical and Computer Engineering, University of Seoul, Seoul 130-743, Republic of Korea
2Optoelectronic Materials Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea

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(Received 25 August 2010; accepted 6 November 2010; published online 22 November 2010)

An efficiently prepared graphene from a bulk graphite using mechanical exfoliation is experimentally investigated for the first practical application to ultrafast photonics. Overcoming the limitations of the method in its size and atomic layer control, the multilayered graphene guarantees a nonlinear intensity modulation. After confirming its excellent crystal quality and few-layered nanostructure employing Raman analysis and atomic force microscopy the graphene layer is introduced into a fiber laser as an intracavity saturable absorber to realize the passive mode-locking that produces picosecond pulses at the repetition rate of 10.9 MHz. Extinction ratio of the resultant pulsed output is higher than 40 dB.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

atomic force microscopy, atomic layer deposition, fibre lasers, graphene, high-speed optical techniques, laser mode locking, optical modulation, optical multilayers, Raman spectra

PACS

  • 42.70.-a

    Optical materials

  • 81.05.ue

    Graphene

  • 42.55.Wd

    Fiber lasers

  • 42.60.Fc

    Modulation, tuning, and mode locking

  • 42.65.Re

    Ultrafast processes; optical pulse generation and pulse compression

  • 78.67.Pt

    Multilayers; superlattices; photonic structures; metamaterials

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3521257

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    A. K. Castro Neto, F. Guinea, N. M. R. Peres, K. S. Novoselov, and A. K. Geim, Rev. Mod. Phys. 81, 109 (2009).

    Y. W. Song, S. Y. Jang, W. S. Han, and M. K. Bae, Appl. Phys. Lett. 96, 051122 (2010)APPLAB000096000005051122000001.


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