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Proceedings Paper

Graphene saturable absorbers for VECSELs
Author(s): V. J. Wittwer; C. A. Zaugg; Z. Sun; D. Popa; S. Milana; T. S. Kulmala; R. S. Sundaram; M. Mangold; M. Golling; Y. Lee; J. H. Ahn; U. Keller; A. C. Ferrari
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Paper Abstract

We report mode-locking of an optically pumped VECSEL using a graphene-based saturable absorber mirror (GSAM). Self-starting and stable modelocked operation is demonstrated with 473 fs pulses at 1.5 GHz repetition rate and 949 nm center wavelength. Wavelength tuning is achieved over a 46 nm bandwidth. We discuss the mirror design, the fabrication of the GSAMs, and give an outlook on further optimization of the design, including dielectric top coatings to protect the graphene and to increase the flexibility in the design.

Paper Details

Date Published: 3 March 2014
PDF: 6 pages
Proc. SPIE 8966, Vertical External Cavity Surface Emitting Lasers (VECSELs) IV, 89660X (3 March 2014); doi: 10.1117/12.2039111
Show Author Affiliations
V. J. Wittwer, Univ. of Cambridge (United Kingdom)
C. A. Zaugg, ETH Zürich (Switzerland)
Z. Sun, Univ. of Cambridge (United Kingdom)
D. Popa, Univ. of Cambridge (United Kingdom)
S. Milana, Univ. of Cambridge (United Kingdom)
T. S. Kulmala, Univ. of Cambridge (United Kingdom)
R. S. Sundaram, Univ. of Cambridge (United Kingdom)
M. Mangold, ETH Zürich (Switzerland)
M. Golling, ETH Zürich (Switzerland)
Y. Lee, Yonsei Univ. (Korea, Republic of)
Sungkyunkwan Univ. (Korea, Republic of)
J. H. Ahn, Yonsei Univ. (Korea, Republic of)
Sungkyunkwan Univ. (Korea, Republic of)
U. Keller, ETH Zürich (Switzerland)
A. C. Ferrari, Univ. of Cambridge (United Kingdom)

Published in SPIE Proceedings Vol. 8966:
Vertical External Cavity Surface Emitting Lasers (VECSELs) IV
Jerome V. Moloney, Editor(s)

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