8 September 2004 Amplification and noises in real active fiber: experimental and mathematical model
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Proceedings Volume 5576, Lightguides and their Applications II; (2004) https://doi.org/10.1117/12.581630
Event: Lightguides and their Applications II, 2003, Krasnobrod, Poland
Signal amplification and noises in active fibers can be investigated both mathematically and experimentally. The investigation is connected with construction of appropriate models. The presented work is referring to the description and analysis of light intensity nature phenomenon appearing during optical signal amplification in optically pumped fibers. The mathematical model that describes the optical pumping and laser action phenomenon that occurs in unit fiber section length is called the energy level diagram. In case when the fiber is the erbium doped energy model is often represented as three level scheme that sometimes is simplified to two levels. Introducing openly the fiber length results in the equation set of radiation intensity propagation. In the physical model real components, which are examined, are applied. In this work in order to build the physical models of amplifier the following components were used: active fiber from 3M corporation, optical pump working at 980 nm from Power Technology, laser signal source for 1550 nm from Thorlabs and optical isolators, WDM-s and connectors. This opto-electronic circuit has been monitored using the computer system by set of Si and AlGaAs detectors. The results obtained by the authors show that simple models of signal amplification can be used, but at the same time the optical noise phenomena are much more complex and have significant broad band value. Their power at output of fiber amplifier, even working on standard operation point, can saturate the photo detector.
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Michal Borecki, Michal Borecki, Jerzy Kruszewski, Jerzy Kruszewski, } "Amplification and noises in real active fiber: experimental and mathematical model", Proc. SPIE 5576, Lightguides and their Applications II, (8 September 2004); doi: 10.1117/12.581630; https://doi.org/10.1117/12.581630

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