Ytterbium-sensitized thulium-doped fiber laser with a single-mode output operating at 1900-nm region |
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| Authors: | S W Harun A Halder M C Paul S M M Ali N Saidin S S A Damanhuri H Ahmad S Das M Pal and S K Bhadra |
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| Institution: | 1 Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia 2 Fiber Optics and Photonics Division, Central Glass and Ceramic Research Institute, CSIR, Kolkata, India 3 Photonics Laboratory, Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia |
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| Abstract: | 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. |
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