Abstract
In the work, characteristics of the erbium-doped fiber amplifier (EDFA) are investigated. The amplification and noise figure dependences on different EDFA parameters in a 2.5 Gbit/s one-channel WDM transmission system are simulated and measured. Additionally, simulation of a four-channel 2.5 Gbit/s WDM system containing in-line amplifiers of the type was done in order to investigate the EDFA performance in multichannel systems. Almost identical results obtained for both the simulation model and the experimental system are indicative of high accuracy of the simulation. It is shown that the EDFA amplification depends on such parameters as the signal power, wavelength, EDF length, and configuration of the pump laser. Key words: Wavelength division multiplexing (WDM), erbium-doped fiber amplifier (EDFA).
Highlights
The capacity of fiber optical communication systems has undergone enormous growth during the last few years in response to huge capacity demand for data transmission (Cisco Systems, 2010)
At the choice of signal amplification method for the wavelength division multiplexing (WDM) systems the preference is given to the class of erbium-doped fiber amplifiers (EDFAs)
Afterwards a simulation model of a 4 channel WDM transmission system was introduced to assess the performance of the EDFA, when it is used as an in-line optical amplifier in a multichannel WDM
Summary
The capacity of fiber optical communication systems has undergone enormous growth during the last few years in response to huge capacity demand for data transmission (Cisco Systems, 2010). Sci. such amplifier parameters as input optical power, power and wavelength of the pumping radiation, length of the EDF and the achieved level of erbium population inversion. The latter was used since it allows observing and studying the EDFA intrinsic processes: The pump power and amplification propagation as well as appearance of ASE (amplified spontaneous emission) noise and its evolution along the fiber
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