Effects of Yb/Tm Concentration and Pump Wavelength on the Performance of Ytterbium-Sensitized Thulium-Doped Fiber Laser

Damanhuri, S.S.A. and Halder, A. and Paul, Mukul Chandra and Ali, S.M.M. and Saidin, N. and Harun, Sulaiman Wadi and Ahmad, Harith and Das, S. and Pal, M. and Bhadra, S.K. (2013) Effects of Yb/Tm Concentration and Pump Wavelength on the Performance of Ytterbium-Sensitized Thulium-Doped Fiber Laser. IEEE Journal of Quantum Electronics, 49 (1). pp. 95-99. ISSN 0018-9197

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Abstract

A 1901.6-nm laser is demonstrated using the newly developed double-clad ytterbium-thulium-doped fiber (YTDF) samples in conjunction with 931-nm pumping through the transition of thulium ion from 3F4 to 3H6 with the assistance of ytterbium to thulium-ion energy transfer. The YTDF used was drawn from a D-shape preform, which was fabricated using the modified chemical vapor deposition and solution-doping technique. The laser operates at 1901.6 nm with an efficiency of 2.47% using 2-m-long YTDF in a Fabry-Pérot cavity with two fiber Bragg gratings. It is found that the higher ytterbium-to-thulium concentration ratio contributes to more efficient energy transfer between the sensitizer and acceptor ions in YTDF, which in turn lowers the threshold of the proposed ytterbium-thulium-doped fiber laser (YTFL). The lowest threshold pump power of the proposed YTFL is around 961 mW. The use of multimode pump with a wavelength slightly lower than 931 nm is also observed to improve both the laser's threshold and efficiency of the YTFL.

Item Type: Article
Uncontrolled Keywords: 2-μm fiber laser; Cladding pumping; Component; ytterbium-thulium-co-doped fiber
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 28 Oct 2015 05:37
Last Modified: 09 Oct 2018 05:58
URI: http://eprints.um.edu.my/id/eprint/14366

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