Graphene-based passively Q-switched dual-wavelength erbium-doped fiber laser.
We demonstrate a compact Q-switched dual-wavelength erbium-doped fiber (EDF) laser based on graphene as a saturable absorber (SA). By optically driven deposition of graphene on a fiber core, the SA is constructed and inserted into a diode-pumped EDF laser cavity. Also benefiting from the strong third-order optical nonlinearity of graphene to suppress the mode competition of EDF, a stable dual-wavelength Q-switching operation has been achieved using a two-reflection peak fiber Bragg grating as the external cavity mirror. The Q-switched EDF laser has a low pump threshold of 6.5 mW at 974 nm and a wide range of pulse-repetition rate from 3.3 to 65.9 kHz. The pulse duration and the pulse energy have been characterized. This is, to the best of our knowledge, the first demonstration of a graphene-based Q-switched laser.
Institute of Optoelectronic Technology, Department of Electronic Engineering, Xiamen University, Xiamen 361005, China. zqluo@xmu.edu.cn
Zhengqian
Z
Luo
Min
M
Zhou
Jian
J
Weng
Guoming
G
Huang
Huiying
H
Xu
Chenchun
C
Ye
Zhiping
Z
Cai
D004871:Erbium / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D007834:Lasers; D013057:Spectrum Analysis; D014867:Water / Q000737:chemistry
D014867:Water; D006108:Graphite; D004871:Erbium