Open AccessWidely-tunable, passively Q-switched erbium-doped fiber laser with few-layer MoS_2 saturable absorber
Author(s) -
You Huang,
Zhigang Luo,
Yingyue Li,
Min Zhong,
Bin Xu,
KaiJun Che,
Huiying Xu,
Zhiping Caï,
Jian Peng,
Jian Weng
Publication year - 2014
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.025258
Subject(s) - saturable absorption , materials science , fiber laser , optics , q switching , pulse duration , laser , fiber , optoelectronics , pulse (music) , doping , wavelength , physics , detector , composite material
We propose and demonstrate a MoS2-based passively Q-switched Er-doped fiber laser with a wide tuning range of 1519.6-1567.7 nm. The few-layer MoS2 nano-platelets are prepared by the liquid-phase exfoliation method, and are then made into polymer-composite film to construct the fiber-compatible MoS2 saturable absorber (SA). It is measured at 1560 nm wavelength, that such MoS2 SA has the modulation depth of ∼ 2% and the saturable optical intensity of ∼ 10 MW/cm(2). By further inserting the filmy MoS2-SA into an Er-doped fiber laser, stable Q-switching operation with a 48.1 nm continuous tuning from S- to C-waveband is successfully achieved. The shortest pulse duration and the maximum pulse energy are 3.3 μs and 160 nJ, respectively. The repetition rate and the pulse duration under different operation conditions have been also characterized. To the best of our knowledge, it is the first demonstration of MoS2 Q-switched, widely-tunable fiber laser.