| 1 | Ytterbium-sensitized thulium-doped fiber laser with a single-mode output operating at 1900-nm region显示文摘A single-mode laser is demonstrated using a newly developed double-clad thulium-ytterbium-doped fiber (TYDF) in a linear cavity formed by two fiber Bragg gratings (FBGs). The YTF used is drawn from a D-shape preform fabricated using the modified chemical vapor deposition and solution doping technique. The laser is operated at 1 901.6 nm via the transition of thulium ions from 3F4 to 3H6 with the assistance of ytterbium to thulium ion energy transfer. The efficiencies of the laser are 0.71% and 0.75% at 927- and 905-nm multimode pumping, respectively. The thresholds of the launched pump power for 927- and 905-nm pumping are 1 314 and 1 458 mW, respectively. A 7-mW output is obtained at a 905-nm pump power of 2 400 mW. | S. W. Harun A. Halder M. C. Paul S. M. M. Ali N. Saidin S. S. A. Damanhuri H. Ahmad S. Das M. Pal S. K. Bhadra | 2012 | Chinese Optics Letters2012，10，10： | 0 |
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