Chinese Optics Letters, 2014, 12 (3): 031403, Published Online: Mar. 17, 2014
Q-switched ytterbium doped fiber laser using multi-walled carbon nanotubes saturable absorber Download: 790次
140.0140 Lasers and laser optics 060.0060 Fiber optics and optical communications 190.0190 Nonlinear optics
Abstract
A Q-switched ytterbium-doped fiber laser (YDFL) is proposed and demonstrated using a newly developed multi-walled carbon nanotubes polyethylene oxide (MWCNTs-PEO) film as a passive saturable absorber (SA). The saturable absorber is prepared by mixing the MWCNTs homogeneous solution into a dilute PEO polymer solution before it is left to dry at room temperature to produce thin film. Then the film is sandwiched between two FC/PC fiber connectors and integrated into the laser cavity for Q-switching pulse generation. The laser generates a stable pulse operating at wavelength of 1060.2 nm with a threshold pump power of 53.43 mW. The YDFL generates a stable pulse train with repetition rates ranging from 7.92 to 24.27 kHz by varying 980-nm pump power from 53.42 to 65.72 mW. At 59.55-mW pump power, the lowest pulse width and the highest pulse energy are obtained at 12.18 μs and 143.5 nJ, respectively.
N. Kasim, A. H., F. Ahmad, Y. Munajat, H. Ahmad, S. W.. Q-switched ytterbium doped fiber laser using multi-walled carbon nanotubes saturable absorber[J]. Chinese Optics Letters, 2014, 12(3): 031403.