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

Title
Multilayered graphene efficiently formed by mechanical exfoliation for nonlinear saturable absorbers in fiber mode-locked lasers
Authors
장유민김형석이주한송용원
Keywords
graphene; mechanical exfoliation; saturable absorber; mode-locking
Issue Date
2010-11
Publisher
Applied physics letters
Citation
VOL 97, NO 21, 211102-1-211102-3
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/38882
ISSN
0003-6951
Appears in Collections:
KIST Publication > Article
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