Tunable Q-switched Erbium-Doped Fiber Laser Using Gold Nanoparticles Saturable Absorber
Document Type
Article
Publication Date
1-1-2019
Abstract
We have fabricated gold nanoparticles (GNP) based saturable absorber and used it to passively Q-switch an Erbium-doped fiber laser (EDFL). By adjusting a tunable filter, the laser operation is tunable from 1535 to 1560 nm. The highest slope efficiency of 23.38% is obtained at 1545 nm. At this operation wavelength, the repetition rate of the self-starting Q-switching pulses is increased from 19.2 to 36.4 kHz, while the pulse width is reduced from 18.2 to 11.1 μs, with increasing pump power from 14.9 to 37.7 mW. The maximum pulse energy of 195 nJ is obtained at 37.7 mW pump power. The proposed Q-switched laser is simple, cost-effective and thus suitable for environmental sensing, metrology and biomedical diagnostics ©2019 Old City Publishing, Inc.
Keywords
Gold nanoparticles, Q-switching, Tunable laser
Divisions
fac_eng
Funders
University of Malaya (Grant No. FG006-17AFR)
Publication Title
Nonlinear Optics, Quantum Optics
Volume
50
Issue
4
Publisher
Old City Publishing