Linearly-polarized Tm-doped double-clad fiber laser |
| |
Authors: | D Z Yang W Liu T Chen W Ye and Y H Shen |
| |
Institution: | 1.State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering,Zhejiang University,Hangzhou,China |
| |
Abstract: | We report a linearly polarized Tm doped fiber laser. The fiber laser was set up by using a piece of polarization maintaining
Tm doped double clad fiber of 5 m length as gain medium and a polarization beam splitter as a polarization selector. The fiber
laser was pumped by a fiber pigtailed laser diode working at 790 nm with a maximum output power of 90 W. The linearly polarized
Tm laser operated at wavelength around 2030 nm. A maximum output power up to 21.9 W was achieved when the pump power was 63.27
W with a threshold of 11.92 W, a slope efficiency of about 43.7%, and a polarization extinction ratio of 92.7% (11.37 dB).
In addition to the blue fluorescence, we also observed the violet fluorescence under high pump power level. The up-conversion
fluorescence was considered to be attributed to the 1
G
4 → 3
H
6, and 1
D
2 → 3
F
4 transitions of Tm ions, respectively. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|