Optically controlled in-line graphene saturable absorber for the manipulation of pulsed fiber laser operation

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We demonstrate an optically tunable graphene saturable absorber to manipulate the laser operation in pulsed fiber laser system. Owing to the strongly enhanced evanescent field interaction with monolayer graphene, we could realize an efficient control of modulation depth in the graphene saturable absorber by optical means through cross absorption modulation method. By integrating the tunable graphene saturable absorber into the fiber laser system, we could switch the laser operation from Q-switching through Q-switched mode-locking to continuous wave mode-locking by adjusting only the optical power of the control beam. In addition, we realized a hybrid Q-switching of fiber laser by periodical modulation of the absorption of the graphene saturable absorber, where we observed that the repetition rate of the Q-switched laser could be continuously tuned according to the modulation frequency of the applied external signal. (C) 2016 Optical Society of America
Publisher
OPTICAL SOC AMER
Issue Date
2016-09
Language
English
Article Type
Article
Keywords

EVANESCENT-FIELD INTERACTION; PASSIVE-MODE-LOCKING; OPTOELECTRONICS; PHOTONICS; MODULATOR

Citation

OPTICS EXPRESS, v.24, no.19, pp.21301 - 21307

ISSN
1094-4087
DOI
10.1364/OE.24.021301
URI
http://hdl.handle.net/10203/214468
Appears in Collection
PH-Journal Papers(저널논문)
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