Effect of transverse distribution profile of thulium on the performance of thulium-doped fibre amplifiers

Emami, Siamak Dawazdah and Abdul-Rashid, Hairul Azhar and Ahmad, Harith and Ahmadi, A. and Harun, Sulaiman Wadi (2012) Effect of transverse distribution profile of thulium on the performance of thulium-doped fibre amplifiers. Ukrainian Journal of Physical Optics, 13 (2). pp. 74-81. ISSN 1609-1833

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Official URL: https://doi.org/10.3116/16091833/13/2/74/2012

Abstract

We study numerical models for different transverse thulium distribution profiles (TTDPs) characterising the fibres used in thulium-doped fibre amplifiers (TDFAs). Our models consider the overlap factor and the absorption/emission dynamics. Basing on the radial TTDP function of the form nT (r) = nT,max exp[-(| r-δ |/θ) β], we show that the TDFA gain increases with increasing β parameter and decreases as the θ parameter increases from 1 up to 3 μm, due to the overlap factor which affects the absorption and emission dynamics of the TDFA. The overlap factor increases with increasing β and decreases with increasing θ value. Finally, the noise figure increases as θ does so, due to suppression of the amplified spontaneous emission.

Item Type: Article
Uncontrolled Keywords: Thulium distribution profile; Thulium-doped fibres
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 02 Jan 2019 04:35
Last Modified: 02 Jan 2019 04:35
URI: http://eprints.um.edu.my/id/eprint/19882

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