Damanhuri, Siti Sarah Ahmad and Halder, Arindam and Paul, Mukul Chandra and Ali, Siti Munirah Muhammad and Saidin, Norazlina and Harun, Sulaiman Wadi and Ahmad, Harith and Das, Shyamal and Pal, Mrinmay and Bhadra, Shyamal Kumar (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 F-3(4) to H-3(6) 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-Perot 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
Subjects:	Processing Science
Divisions:	Fiber Optics and Photonics
Depositing User:	Bidhan Chaudhuri
Date Deposited:	09 Sep 2013 08:29
Last Modified:	08 Feb 2017 10:14
URI:	http://cgcri.csircentral.net/id/eprint/2109

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