Efficient graphene saturable absorbers on D-shaped optical fiber for ultrashort pulse generation
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Artigo
Date
2016
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Scientific Reports
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129
Authors
Zapata J.D.
Steinberg D.
Saito L.A.M.
De Oliveira R.E.P.
Cardenas A.M.
De Souza E.A.T.
Steinberg D.
Saito L.A.M.
De Oliveira R.E.P.
Cardenas A.M.
De Souza E.A.T.
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Volume Title
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Abstract
© 2016, Nature Publishing Group. All rights reserved.We demonstrated a method to construct high efficiency saturable absorbers based on the evanescent light field interaction of CVD monolayer graphene deposited on side-polished D-shaped optical fiber. A set of samples was fabricated with two different core-graphene distances (0 and 1 μm), covered with graphene ranging between 10 and 25 mm length. The mode-locking was achieved and the best pulse duration was 256 fs, the shortest pulse reported in the literature with CVD monolayer graphene in EDFL. As result, we find a criterion between the polarization relative extinction ratio in the samples and the pulse duration, which relates the better mode-locking performance with the higher polarization extinction ratio of the samples. This criterion also provides a better understanding of the graphene distributed saturable absorbers and their reproducible performance as optoelectronic devices for optical applications.