Model for a Thulium-Doped Silica Fiber Amplifier Pumped at 1558 nm and 793 nm
M A Khamis1, K Ennser2
1M A Khamis, Department of Electronic and Electrical, College of Engineering, Swansea University, Swansea, UK.
2K Ennser, Department of Electronic and Electrical, College of Engineering, Swansea University, Swansea, UK.
Manuscript received on 15 April 2016 | Revised Manuscript received on 25 April 2016 | Manuscript Published on 30 April 2016 | PP: 76-80 | Volume-5 Issue-4, April 2016 | Retrieval Number: D4530045416/16©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: This paper investigates the static behavior of Thulium-doped fiber amplifier (TDFA) operating around 2 µm at two different pump wavelengths. The developed model provides 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. Simulation results show that the amplifier with pump at 1558 nm is more efficient than one with pump at 793 nm with core pumped low concentration thulium-doped silica fiber. Our findings reveal that a larger amplified signal can be achieved by increasing the pump power and the thulium-doped fiber length. In case of in-band pumping, 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 indirect pumping, only 30 dB maximum gain is achieved under the same conditions. Also, it is important to take into account the selection of the seed wavelength in the TDFA design because high amplification can be produced when the selection seed wavelength is near the center of the emission cross-section curve
Keywords: Amplified Spontaneous Emission, Cross-Relaxation Process, Silica Glass Material, Thulium-Doped Fiber Amplifier.
Scope of the Article: Radio Over Fiber