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Model for a Thulium-doped silica fiber amplifier pumped at 1558nm and 793nm

Mustafa Khamis, Karin Ennser

International Journal of Engineering and Advanced Technology, Volume: 5, Issue: 4, Pages: 76 - 80

Swansea University Author: Karin Ennser

Abstract

This paper presents the static behavior of Thulium-doped fiber amplifier (TDFA) operating around 2 μm at two different pump wavelengths. The model considers the influences of the amplified spontaneous emission (ASE) noise, the wavelength and the power of the seed, the thulium-doped fiber length and...

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Published in: International Journal of Engineering and Advanced Technology
Published: 2016
URI: https://cronfa.swan.ac.uk/Record/cronfa28897
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Abstract: This paper presents the static behavior of Thulium-doped fiber amplifier (TDFA) operating around 2 μm at two different pump wavelengths. The model considers the influences of the amplified spontaneous emission (ASE) noise, the wavelength and the power of the seed, the thulium-doped fiber length and the pumping power into the TDFA. Numerical results show that the amplifier with the pump at 1558 nm is more efficient than one with the pump at 793 nm with core pumped low concentration thulium-doped silica fiber.Our findings reveal that in case of a pump at 1558 nm, the maximum gain reaches up to 34.4 dB with a 2 W pump power when a -10 dBm seed wavelength at 1900 nm is used. In contrast to a pump at 793 nm, only 30 dB maximum gain is achieved under the same conditions. Also, it is important to consider the selection of the seed wavelength in the TDFA design because high amplification can be achieved when the selected seed wavelength is near the center of the emission cross-section curve.
Keywords: optical amplifier, thulium-doped fibre, pumping scheme, static model, amplified spontaneous emission noise
College: Faculty of Science and Engineering
Issue: 4
Start Page: 76
End Page: 80