Graphene mode-locked femtosecond laser at 2 μm wavelength.
We experimentally demonstrated a passively mode-locked femtosecond laser by using a graphene-based saturable absorber mirror (graphene SAM) in the spectral region of 2 μm. The graphene SAM was fabricated by transferring chemical-vapor-deposited, high-quality, and large-area graphene on a highly reflective plane mirror. Stable mode-locked laser pulses as short as 729 fs were obtained with a repetition rate of 98.7 MHz and an average output power of 60.2 mW at 2018 nm.
Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics, Shanghai Jiao Tong University, Shanghai, 200240, China.
J
J
Ma
G Q
GQ
Xie
P
P
Lv
W L
WL
Gao
P
P
Yuan
L J
LJ
Qian
H H
HH
Yu
H J
HJ
Zhang
J Y
JY
Wang
D Y
DY
Tang